Btrfs raid 10. Topic closed #1 2016-03-24 19:32:41.

Btrfs raid 10 That pretty much unrecoverably kills an array, and is why people dislike RAID 5 and 6 on btrfs. If one dies, some of the data will have three remaining copies, and some will only have two copies left. reflink. BTRFS is a modern copy on write (COW) filesystem for Linux aimed at implementing advanced features while also focusing on fault tolerance, repair and easy administration. btrfs(5) — BTRFS documentation Click to expand That's talking about RAID56, not Ideally, my plan would be to unify the 4TB drives into a second Raid 1, put a Raid 0 on top of it all and run a balance to diffuse the existing data between the two Raid 1s, but I'm not sure how I could pull that off in btrfs (or even if I could), or if the only supported Raid 10 configuration would mean losing 4TB of space. 76GiB path dm-0 devid 3 size 949. Single RAID0 RAID1 RAID1c3 RAID1c4 RAID10 RAID5 RAID6 Kernel 5. I will also cover automatic decrypting at boot using a key file. RAID 1 simply guarantees that each block is mirrored across two devices, but when it has four devices to play with it can be quite creative. Btrfs was created to address the lack of pooling, snapshots, checksums, and integrated multi-device spanning in Linux file systems, particularly as the need for such features emerged when Issue the following commands, which will create a RAID-1 btrfs filesystem over /dev/sda1 and /dev/sdb1, labeling it RAID1: make. What benefits does BTRFS managing the RAID give? It's directly responsible Btrfs RAID 10 also requires 4 devices and guarantees that 2 volume members can fail without data loss, so long as it's not a mirrored pair that fail in a 4 device configuration. Rotated volume snapshots. In still testing the four Intel Series 530 SSDs in a RAID Raid 10 Is faster than Raid 6 in general there are exceptions to this. As of Linux 3. 14+ I believe it may work as you can now create a Degraded raid1 1 disk and raid10 According to "Examining btrfs, Linux’s perpetually half-finished filesystem", BTRFS RAID1 is said to be "guaranteed redundancy—copies of all blocks will be saved on two separate devices". Now I added sdf a new disk (its doing the balancing): Total devices 5 FS bytes used 5. Though not guaranteed, there's I realize now that that is not the best way to setup a btrfs raid of course. The boot on BTRFS RAID is not really ready, you have no helper for it and at installation or when you need to replace a boot disk, you need to install grub on the second disk manually and also add the entry in the UEFI menu. 64TiB used 2. 73TiB devid 1 size 3. RAID levels 0 and 1 are currently Hello @iio7, this is not guide which uses Btrfs on the system partition, so there's no need for a bootloader like grub. To get that with RAID 1 requires N*3 disks whereas RAID 6 is just N+2. That data drive is used entirely for this, has been created by mkfs. > Linux btrfs supports raid5 in general, but has known edge cases which make it not safe to use. If you don't see any disks, they either need to be wiped or you are trying to select usb disks which are not supported in raid arrays. A script that will send an email notification when BTRFS and or RAID scrubs are BTRFS RAID 5/6 has issues. ) mkfs. How would you setup the storage system for an R730XD with H330 raid card and lots of disks? Here is where we are leaning: VirtualDisk1: 3 drive raid 1 (2+ hot spare) for Host OS - ext4 VirtualDisk2: 11 drive raid 10 (10 + hot spare) for containers, un-formatted during Host install leaving lxd init to format raw Btrfs RAID-1 helps protect you not just from inevitable drive failures, but also from the vast majority of common types of on-disk corruption - eg CERNs objective data on the matter. 10 (2017-03-08) You can attach any amount of disk of any size to a btrfs RAID array, and btrfs will automatically balance the data across the devices according to the requirements of the selected RAID level. I took the following steps: added two more hard disks to the system; formatted the hard disks identically to the existing disks; added the disks/partitions to the 3 raid Btrfs distributes the data (and its RAID 1 copies) block-wise, thus deals very well with hard disks of different size. Thanks in advance. This isn't really a BTRFS question. raid; btrfs. No matter how many disks or their size, btrfs RAID 1 makes 2 copies. Raid 1 has been rock solid in BTRFS for years now on the MythTV box root and home partitions. Members Online. Redundancy works with checksumming to allow self-healing, if there's a good This repair can be forced by using btrfs scrub. If you don't need self-healing or the flexibility of btrfs RAID, using LVM RAID instead is viable. JorgeB. Feature. RAID Support: RAID support adds huge storage capacity to a computer 10 is good for speed but has the same "2nd disk failure kills the entire array" problem. Btrfs's checksumming helps prevent silent data corruption, which is critical in Good morning/afternoon/evening, I’m totally confused. Welcome to your friendly /r/homelab, where techies and sysadmin from everywhere are welcome to share their labs, projects, builds, etc. , RAID 1, RAID 10) Btrfs is unique in its ability to handle different RAID levels (such as RAID 1, RAID 5, RAID 6, and RAID 10) within the file system itself. But the answer is the same - yes it is very stable. 78TiB path /dev/sdc devid 3 size 3. Since btrfs-progs 6. Built-in RAID Support: Btrfs supports various BTRFS is still experimental and you can end up with "interesting" features if something should crash. Btrfs tools have been known for a long Fortunately BTRFS allows you to have different raid levels for data and metadata so you could run raid 1 for metadata and raid 5 for data. They don't influence each other. The max_inline mount option value is ignored, as if mounted with max_inline=0. You do NOT need an even number of matched size disks. $ ls -l /dev/btrfs-control crw----- 1 root root 10, 234 Jan 1 12:00 /dev/btrfs-control The device accepts some ioctl calls that can perform following actions on the RAID-10 is built on top of these definitions. Free space cache v1. This does work fine and I can personally vouch it surviving sudden power losses, drive failures and on one occasion hardware failure with some corrupting memory that would bitflip every so often. OK. And there is no daemon to check the status of the array, so BTRFS warn the user by preventing the mounting of a degraded array, you have to add I have also been following btrfs' status over the years since I built the last system. . 76GiB path dm-2 A script that will send an email notification when BTRFS and or RAID scrubs are active showing the current status - wallacebrf/Synology_Data_Scrub_Status. RISC-V (pronounced "risk-five") is a license-free, modular, extensible computer instruction set architecture (ISA). Improve this answer. I have now two Raid 1 btrfs (2x4 TB; 2x12TB) and it works flawless so far. The subvolumes share a pool of disk space but have separate inode numbers and can be mounted in different places. Every stripe is split across to exactly 2 RAID-1 sets and those RAID-1 sets are written to exactly 2 devices (hence 4 devices minimum). Single is also default metadata profile for non-rotational (SSD, flash) devices. Before mounting such filesystem, the kernel module must know all the devices Updates of the raid-stripe-tree are done at ordered extent write time to safe on bandwidth while for reading we do the stripe-tree lookup on bio mapping time, i. They tried many setups to recreate the gloom and doom that everyone keeps repeating, but didn't have any troubles. By comparison, with RAID 5 you lose a To install Ubuntu Server on btrfs RAID10, use the following steps: Use gparted to create btrfs partitions on all the disks you want to use in the btrfs RAID10 setup, be sure to RAID 10, just like RAID 1 protects against a single drive failure. Data integrity and reliability: If you So to begin, i have problem with my btrfs file system, its read only, and i cant do nothing with it. /srv is used for site specific data. But the lack of tooling atm makes me think about to revise my decision. Offline #2 2022-05-20 16:09:47. Basically it's "available, but experimental, for developers only". A form of RAID which stores two complete copies of each piece of data, and also stripes each copy across multiple devices for performance. [On phone so difficult to make the quote work] It won't use all ten drives, RAID1 will have only two copies Supports creating a Btrfs volume of up to 1 PB in size, which is only available on certain Synology NAS models and under specific conditions. Swap one out, resilver, I have no special use case to use BtrFS RAID 10 over mdadm RAID 10 with XFS. You can have some files with no mirror copies ("single" or "raid0") and other files that are mirrored ("raid1"). mdadm has better tooling and support and all distro installers should allow you to set it up easily. Copies: Min data stripes: Max data stripes: Parity stripes: Device sizes. imo BTRFS native Raid 6 is a complete nogo and I would strongly discourage raid 5 use. btrfs /deb/sdb/ and is mounted to /mnt/data/. This post will describe the process for creating an encrypted BTRFS RAID 1 array. I had some problems when raid1ing my 12TB HDD to the second on my Raspberry Pi. RAID 10 allows two hard drives to fail, usually it's ok to directly replace the failed hard with the new one in the same brand and model, the RAID 10 will be automatically rebuilt. Unless you are comfortable with testing, I'd avoid 5/6. 0, BTRFS is introduced as optional selection for the root file system. conf and instead add btrfs to the MODULES array. So btrfs will deal with heterogeneous disk sizes in a reasonable manner. Follow edited Jun 17, 2021 at 15:32. Among its other features, it supports: Reading and writing of Btrfs filesystems; Basic RAID: RAID0, RAID1, and RAID10; Advanced RAID: RAID5 and RAID6 Btrfs supports RAID 0, 1, 5, 6, and 10 (RAID 1 and RAID 0 combined). when the logical to physical translation happens for regular btrfs RAID as well. . my problem is today it doesn’t allow me to write more data and I get why. That's not its goal. Is it still true that btrfs RAID1 and RAID10 can only survive one drive loss, even with more than the minimum required drives? Hi folks! Looking for thoughts on best practice here. – Adrian Günter. Two very different questions. Built-in volume management, support for software-based RAID 0, RAID 1, RAID 10 and others Spinners are so much slower than SSDs that it's silly to worry about a 2% or even 10% faster speed, when 1,000% speed increases are available. So if you are going to be serving it over the network as a servce (FTP or NFS or whatever), it might make sense to mount it there, but this Hello, we are using btrfs RAID-10 (/data, 4. 85GiB used 759. Replacing a drive in RAID 6 For this Btrfs RAID testing from the latest Linux stable kernel tests were done on a single SSD, two SSDs in RAID0, two SSDs in RAID1, four SSDs in RAID0, four SSDs in RAID1, and four SSDs in RAID10. Press CTRL-ALT-F1 to go back to the installer and choose to manually partition your disk. So what to do with an existing setup that’s running native Btfs RAID 5/6?. E. Last year I upgraded the disks in my Proxmox cluster (in raid 10) to larger disks with zero downtime. 78TiB path /dev/sde devid 5 size 3. Status. DESCRIPTION . BTRFS RAID 1/10 works fine. First some Yep. Share. 00GHz (16 Cores), Motherboard: Gigabyte X99-UD4-CF, Chipset: Intel Xeon E5 v3/Core, Memory: 16384MB, Disk: 4 x 120GB INTEL SSDSC2BW12 + 128GB Crucial_CT128MX1, Graphics: XFX AMD Radeon HD 7950/8950 OEM / R9 280 3072MB, Raid stripe tree. RAID 6 is more expensive than RAID 5 and potentially allows recovery from two disk failures. However BTRFS on top of mdadm 5/6 is serviceable. I recall reading somewhere recently, that the Linux btrfs developer intends to fix these edge cases through a on-disk layout change (IIRC, adding one more btree to the filesystem). 04 server. Then click on "Create and mount a filesystem" Select BTRFS. The default for data (as opposed to metadata) in btrfs. The combination of the use of BTRFS checksums to avoid data corruption and RAID-0 for performance would be good for a build server or any other system that needs large amounts of temporary file storage for repeatable jobs but for which avoiding data corruption is Btrfs has built-in RAID capabilities, allowing a Btrfs filesystem to natively span multiple disks/SSDs in RAID-0, RAID-1, or RAID-10 configurations. Arch Linux flat out says that raid 5 is fatally flawed in BTRFS. How to Restore Files from Btrfs Systems in RAID (e. It does not guarantee surviving 2 failed devices because of how it To install the driver, download and extract the latest release, right-click btrfs. You could also look into Linux software RAID and sticking BTRFS on top (single or striping, etc), but I personally prefer the simpler approach and having the flexibility of BTRFS' multi-device stuff, pulling/adding drives easily, and even changing policy/redundancy/striping levels whenever I might want. ZFS on Linux is far less stable then BTRFS is on Linux - I can tell you this from my personal experience whenever workload is actually put on it and there's lot of I/O it will bring the machine to an halt - e. The online space calculator also contains a remark to this effect under Preset RAID levels: Note that these are the only parameter settings supported by btrfs at present. Due to the similarity, the RAID terminology is widely used in the documentation. A “RAID” level in btrfs, storing a single copy of each piece of data. Furthermore, what it calls RAID 1 is still striped across multiple devices here, so it's still more akin to RAID 10 than real RAID 1. btrfs -m raid1 -d raid1 /dev/sdd /dev/sde $ mount /dev/sdd /media/media Copied a bunch of data onto the partition, with the result: Convert PERC H310 RAID 10 to 4 Non-RAID Disks Encrypt Disks, Add to Array, and Rebalance Array Offsite Comments CLI CLI Command-Line Interface (CLI) A More Productive CLI Experience with zsh, fzf, and tmux Add New Disks and Create Interim Btrfs 6 TB RAID 0 Storage Array: Put 2 new 3 TB HDDs in bays 6 and 7. Raid 10 can handle 2 disk lost and still function as long as the disk are not a raid-stripe-tree, new tree to track extent mapping for raid profiles, allows raid1*, raid0 and raid10 on zoned devices (kernel 6. 78TiB path /dev/sdb devid 4 size 3. Another possible workaround is to remove the udev hook in mkinitcpio. Main system setup almost identical to the A notable downside of btrfs RAID is that metadata is duplicated in the cache requiring a larger one for the same effect. For more details on the available options, read btrfs man page $ man 5 btrfs Working with BtrFS – Using Examples. For real world usage raid 1 or 10 is really the only safe choice Reply reply nealhamiltonjr • Does 10 allow use of different drive sizes? I thought I recollect reading it did not. If you really have/want to run btrfs it would be for the time being a lot safer to run it on top of a software raid than to just run it directly. I use raid 10 which performs well but needs twice the number of drives. There's a subtle point here that a lot of people miss and that's that redundant raid anything buys you uptime and not disaster recovery, so if you're looking for a safe way to recover your data in the event of a RAID support: Btrfs supports RAID arrays , which ensures data protection and fault tolerance. Btrfs - ArchWiki wiki. inf, and choose Install. Further down the road I want to add a second harddisk and convert the singledrive Just because this thread comes up in Google, I would like to echo noctrex's answer in recommending WinBtrfs (GitHub), an experimental Windows Btrfs driver. 9, btrfs also supports RAID-5 and RAID-6 although that code is still experimental. Furthermore I wouldn't recommend using Btrfs configured as RAID1 as system partition. In this video I show you an overview of how the RAID 1 level works in BTRFS. cas cas. While copying a bunch of files to a computer running btrfs, the file system disappeared and basic tasks, like running ls, returned input/output errors. In Btrfs, "RAID" is chunk-level, not disk-level, so it's possible to have more than the regular number of disks because each of the 1GB chunks can be RAIDed to a different RAID 10: sudo btrfs -m raid10 -d raid10 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1. Multiple device support unlocks data mirroring for redundancy and striping for performance. I have a small hardrive which for / and a large disk for documents served to my colleagues in our office via samba. Raid 10 with BTRFS @, @home, @var EFI boot SystemD NetworkD SystemD boot ReolveD. Devices can be Yeah there's no equivalent for raidz3 10 disk zfs setup in btrfs-land. btrfs requires a minimum of two devices to use RAID-1. snapshot. A mdraid-10 solution with 6 disks would be best compared to BTRFS raid-1c3. Ultimately, I still want a Raid 1 setup at all to minimise interruptions due to (admittedly rare, but not Hello, I have been following Rockstor for a couple of months with great interest. And it kind of is for raid1/10. As the manual states, stripping conversions require a lot of free space on each drive, so you may want to convert the meta-data and data separately. I'll read more about 1 and 10 for btrfs specifically but curious what would be the best bet for a storage server and perhaps running proxmox off it as well? As in. It's very conservative in what it caches Hi all, doing a little due diligence here hoping to tap your collective brains before embarking on the change. If you using Windows 10 or 11 and have Secure Boot It's certainly true of hardware RAID 1 vs 10, but I'm not sure if Btrfs sees a performance boost from RAID 10. Now I have purchased a second hand rackmount server to hold some left over hdd’s and I want to use Rockstor on it. Or maybe try to hold out another year to wait and see if bcachefs fulfils its lofty So if you need more performance look at something else like raid 10. And also to be aible to easily cretae snapshots etc. To get the most out of it, you need to configure some values. Otherwise, perhaps try degenerate RAID10; I can imagine that might improve speeds a little. Any file you write or edit is automatically saved to both mirrored drives. gz Atom feed top 2025-01-09 15:15 [PATCH v3 00/14] btrfs: more RST delete fixes Johannes Thumshirn 2025-01-09 15:15 ` [PATCH v3 01/14] btrfs: selftests: correct RAID stripe-tree feature flag setting Johannes Thumshirn First off, some info on your setup, it looks like you have four drives in a BTRFS "raid 10" volume (so all data is stored twice on different disks). because only the metadata will be copied to both discs (you can see your metadata size with btrfs filesystem Btrfs raid10 is about as stable as raid1, but you could only lose 1 disk of 4, with dual raid pools you can lose 1 of 2, also if you lose one pool due to fs corruption or other issues you don't lose everything so for that is better, raid10 would have a nice performance bump, but in either case you should have backups. Checksumming alone is sort of a neutered half-feature - it only allows you to be able to tell there was a problem. If you have enough storage space and it is spread across 2 devices, it is really advisable to use btrfs RAID1/10. btrfs -f -d raid5 /dev/sdb /dev/sdc /dev/sdd (If you want to look over the options for the above, a reference is -> here. No I am not using dm-integrity, I think it's still quite new stuff and have some issues. conf and replace it with the systemd hook. mostly OK. They run a old kernel with an enormous out of tree patchset on top to combine dm-raid with btrfs. Alles anzeigen. Then, BTRFS RAID-10 is similar to BTRFS RAID-1, but takes special care as to how data is written over multiple disks. 15. I run non-critical Virtualbox instances over an NFS to my BTRFS RAID array, and I've been doing this for over a year now without any issues. Posted February 7, 2019. I have configured raid (but it was configured by other person and i dont know what knid of raid it is). This BTRFS volume is then carved up into subvolumes on different mount points. RAID 10 combines the mdadm Btrfs: RAID 10 mdadm Btrfs: RAID 5 mdadm Btrfs: RAID 6. Bulletproof your system. This differs from MD-RAID and dmraid, in that Last month on Phoronix I posted some dual-HDD Btrfs RAID benchmarks and that was followed by Btrfs RAID 0/1/5/6/10 testing on four Intel solid-state drives. The more the number of drives, the more space you loose if you use RAID 1 or 10 opposed to RAID 5 or 6. The device management works on a mounted filesystem. Change the Profile to Raid 1. More posts you may like r/homelab. Stevearch Member From: North Wales Registered: 2014-04-21 Posts: 80 [BUG] Possible BTRFS Raid bug. btrfs -L RAID1 -m raid1 -d raid1 /dev/sda1 /dev/sdb1 && btrfs device scan. 7 the default sector size is 4KiB as this allows cross-architecture compatibility. Btrfs comes with built-in support for RAID levels 0, 1, 10, 5, and 6. 1k 4,194 Posted For example, btrfs RAID 1 would be better to be named "2 copies". Its main features and benefits are: Snapshots which do not make a full copy of the files. 15 or later. In the comments at the end of the article I described what I did to create a RAID 10 array in VMware, converting a default openSUSE 15 install from a default single disk to the multi-disk RAID array. We'll see some of the basic operations such as creating, expanding and shrinking To elaborate on this a bit: With raid1, btrfs will allocate chunks 2 at a time, and always from the disks with the most space free. ) btrfs filesystem label /dev/sdb BTRFS1 (Where BTRFS1 is the name of the array, substitute your name in. Devices can be then added, removed or replaced on demand. When btrfs matures and goes into production this might not be true anymore. btrfs is used to create the btrfs filesystem on a single or multiple devices. It provides many of the Minimizing Downtime and Enabling Incremental Upgrades by building a RAID10 Array with Btrfs. If you did not change this then likely you will have no problem adding the second disc and running re-balance. 2 @AdrianGünter Actually, no, Peter is correct given the current implementation. nolist_policy 10 months ago | root | parent | next. I appreciate the input. Hey guys, I have a BTRFS raid 10 setup in Virtualbox (I'm getting to grips with the Filesystem) I have the raid mounted to /mnt like so - RAID allows potential recovery from hardware failure. 7) btrfs-progs-4. unsupported. The data is interleaved across 2 disks, so reading sequentially bounces back and forth between two disks. 7 kernel across four SATA Each copy is stored on a different device. A btrfs RAID-10 volume with 6 × 1 TB devices will yield 3 TB usable space with 2 copies of all data. I could put RAID 0 here&mldr; but Btrfs (B-tree filesystem) is a modern copy-on-write filesystem for Linux that comes with built-in support for RAID configurations. This configuration offers no parity, striping, or spanning of disk space across multiple disks, since the data is mirrored on all disks belonging to the array, and the array can only be as big as the smallest member disk. Processor: Intel Core i7-5960X @ 4. btrfs combines all the devices into a storage pool first, and then duplicates the chunks as file data is created. org 6. btrfs supports RAID-0, RAID-1, and RAID-10. Follow edited May 23, 2017 at Yes. I spent two hours this morning I think I’ll do a Raid 10 BTRFS setup for now, using Timeshift and timeshift-autosnap-apt for extra rollback abilities. I am running btrfs 4. You gain speed, and a little bit more redundancy as you might be able to lose more than 1 drive and still have a working array with all your data (I've tested removal of 2 drives from a btrfs raid 10). A read-write mount (or remount) may fail when there are too many devices missing, for example if a stripe member is completely missing from RAID0. The fix for it is to save your metadata in I used to have RAID10 btrfs setup with 4 disks. » [BUG] Possible BTRFS Raid bug; Pages: 1. In RAID 10 you have two sets of RAID 1 duplicated stripes, so again 50% storage efficiency. btrfs [options] <device> [<device>]. btrfs(8) SYNOPSIS . Device names below are examples only. Tajnymag 10 months ago | parent | next. [88] [89] Btrfs can initiate an online check of the entire file system by triggering a file You could use btrfs which can convert between raid levels on a mounted filesystem. I'm on the fence here I have the opportunity to rebuild my storage server with 12x 10 TB drives (120 TB), and I think I want to give btrfs a go. Unfortunately extending a RAID-10 is not possible via GUI but it is possible according to the shipped mdm utility. If I'd read your reply before converting, I would've done before and after benchmarks, but I'm not spending another week converting the array to RAID UUID=<UUID> /mnt/raid btrfs defaults,autodefrag 0 2 At this point /mnt/raid/ is a RAID1 using /dev/sde1 & /dev/sdb2. This is the default for btrfs's metadata on more than one device. For deduplication, the ZFS file system supports the reduction of disk space needed when backing up files. Today, one of the drives in my BTRFS RAID 10 array failed and I am posting how to handle the situation for others, and in case it ever comes up again. In fact I've converted back and forth between raid 1 and raid 10 a few times as I've grown my system over the years. These profiles, often referred to as RAID modes, provide different levels of data redundancy, space Ext4 is more battle tested, but nowadays most of BTRFS, specifically the RAID-1,10 (but not RAID-5,6) and scrubbing (corruption healing) features are not only production ready, but also used by default by SUSE and Red Hat on Fedora, two heavy weights in the Linux corporate and server space. A btrfs filesystem can contain chunks of files with different raid levels. Currently it is configured as a four disk RAID-10, no SHR, BTRFS, single volume system. I might virtualize the storage server. Featured on Meta We’re (finally!) going to the cloud! More BTRFS filesystem can be created on top of single or multiple block devices. Replacing a drive in RAID 10 requires you read the entire mirrored drive once. I have a RAID 1 array in my system which I occasionally access via NFS, which I just mount at /storage. Multiple devices are grouped by UUID of the filesystem. March 27, 2022. Suse and Ubuntu both have it in production. ) Go in the GUI; I set up a btrfs partition using two 3 TB drives in RAID 1: $ mkfs. The answer of what RAID (if any) to use is determined by the purpose of the array. The speed of recovery and rebuild of an array if it is damaged RAID 5 vs. My lab machine currently has two secondary hard drives, each one consist of 1 GB to use in the demonstrations to follow shortly. 04 system with a luks-encrypted partition for the root filesystem (including /boot) formatted with btrfs that contains a subvolume @ for / and a RAID-10. I have tried various combinations of mkfs. With 4 disks that means that no drive holds a complete copy of the data. RAID 1/10 is great, been using it for years. I should have mentioned that the storage for Mythtv recorded shows, movies, etc is running on something that is just asking for trouble, 20 2. btrfs with two drives, btrfs device add of the third drive and btrfs balance (using 8+4+4 GiB LVs as the "drives"). BTRFS' journaling system allows recovery from filesystem errors. This assumes we have an encrypted root as well which is where the key file will be stored. Have you been pretty happy with Bcache? It does what it says on the tin. When it comes to mdadm (traditional) RAID, I don't believe it's possible to set up RAID 1 and later convert it to RAID 10 within the GUI. Yes but they don't contribute upstream. Throw a mix of sizes and numbers at it, it just works. next prev parent reply other threads:[~2025-01-09 15:15 UTC|newest] Thread overview: 17+ messages / expand[flat|nested] mbox. Notes. Larger than 4 disks then Raid 10 looses more disk space You always loose 50% with Raid 10. My laptop has a large data partition, which again, is just at /storage. CoW: Copy on Write (CoW) is one of the key features built directly into the Btrfs file system. 4. The btrfs volume snapshot system is very efficient & incremental, meaning that only file changes are stored, everything else just points to existing Btrfs is a computer storage format that combines a file system based on the copy-on-write (COW) principle with a logical volume manager (not to be confused with LVM), developed together. scenario of replacing 1TB HDD to 500GB SSD does not work and allow only add / remove option. The disk usage calculator gives me two regions, a green one with ~8TB and 4 allocated drives and another 4TB with 2 There is a lot of older information about btrfs RAID10 and I want to know if 2 btrfs RAID1 groups offer any more redundancy than 1 btrfs RAID10 group (4 disks). But it isn't for raid5/6 and it doesn't seem like it ever will be due to fundamental design choices. I have no record of how I created it It’s a bit old. Starting with Proxmox VE 7. In summary, Btrfs is a suitable choice for a home NAS setup, especially if you plan to use RAID-10 and take precautions such as regular backups and monitoring. 8k 7 7 gold badges 127 127 silver badges 197 197 bronze badges. Do note in any case that btrfs is not made to be the fastest filesystem out there. My server is an IBM / Xyratex HS-1235e, which is a rebranded Intel SSR212MC2 reference design. See mkfs. An early version of a RAID array. If ZFS works well for you I'd just bite the bullet of over-sizing it again. (N – 2) x (Smallest drive size) RAID 10: ≧4 (even number) RAID 10. Raid 1 won't be slower, but it wont' be faster - like raid10 would be. Hi, I have a computer with two btrfs RAID 10 volumes (/ and /mnt/hdds). The required number of disks RAID 10 vs RAID 5: RAID 5: three; RAID 10: four; 5. 6. 10: RAID 5: slow; RAID 10: fast; You can still raise the I wouldn't expect there to be a huge difference because btrfs is intelligent. With 4 disks the loss of space is the same as raid 6 Raid 10 is easier to upgrade in most cases. Calling it RAID1 is a bit confusing when you start thinking about more than 2 disks. And supports different data and metadata raid levels, is a cow fs with all the benefits that brings (cow can be turned of for files/directories for which it's not well suited (vms, dbs), protects against bit rot, supports deduplication, compression, . 7 file-system benchmarks, here are some tests of Btrfs' built-in RAID functionality when tested on the Linux 4. The device is typically a block device but can be a file-backed image as well. You can also have more than 3 devices with both. Originally designed for computer architecture research at Berkeley, RAID-10 is built on top of these definitions. You can now choose /dev/sda1 and define the mount point '/'. This was missing before and was the reason btrfs raid didn't go anywhere for so long. For RAID 1, this is because the data is stored on all the other hard drives. That said, performance + features are fairly well balanced this way, which is why There is no benefit to not using raid10 with more than 2 drives on btrfs. Hi, I am using two 4TB drives and two 8TB drives. 5" SATA SMR 2TB drives and once again BTRFS Raid 6 for the data and raid 1c4 for the metadata. However, setting up RAID 10 for BTRFS is not supported in the GUI. Instead use btrfs balance start -dconvert=raid1 -mconvert=raid1c3. 7) simple quotas, simplified accounting that does not track exclusive and shared extents (kernel 6. raid1c4 for metadata would only allow you to mount the filesystem if 3 of your 4 Btrfs supports spanning multiple devices with no volume manager required. A workaround is to remove btrfs from the HOOKS array in /etc/mkinitcpio. 1 on a fresh ubuntu 18. Since that is just some performance, I didn't care at all (also don't have 4 drives). These are the main issues currently affecting the reliability of BTRFS raid 5/6 btrfs disk usage calculator. 64TiB used BTRFS supports RAID-0, which is a good option to have when you are working with data that is backed up well. I definitely should have been using snapshots. BTRFS is great for this. In contrast, XFS filesystems are confined to a single physical disk or partition. r/homelab. archlinux. When I run btrfs fi show /, one of the drives is missing: # btrfs fi show / Label: none uuid: 100ef828-04be-4d69-a1b3-7b0b32f41d4a Total devices 4 FS bytes used 1. Is Btrfs mature enough nowadays to be used on a RAID 10 array? According to the Status Page of the Btrfs website it seems stable for Raid 10: Status - btrfs Wiki; Do you mean ON a RAID 10, or to CREATE a RAID 10. Commented May 21, 2018 at 19:05. RAID-1 is defined currently as "2 copies of all the data on different devices". In this article we explain how to use Btrfs as the only filesystem on a server machine, and how that enables some sweet Use btrfs balance start -mconvert=raid0 -dconvert=raid0 /path to convert the filesystem's meta-data and data (system chunks will convert too). With Btrfs, you can combine multiple storage When using RAID 10, space efficiency is reduced to 50% of your drives, no matter how many you have (this is because it’s mirrored). Also this comment suggests to avoid using md-raid under btrfs, which makes btrfs' self-healing impossible. Then, you replace a new next prev parent reply other threads:[~2025-01-09 15:15 UTC|newest] Thread overview: 17+ messages / expand[flat|nested] mbox. However, I noticed that the instances became unresponsive and The first link in my openSUSE WIKI -BTRFS RAID points to the Lizards announcement about the Partitioner supporting BTRFS RAID. WorMzy Administrator From: Scotland Registered: 2010-06-16 Posts: 12,429 Website. XFS has no native Btrfs raid 1 should be as safe as any other raid 1, and by that I mean it should allow you to continue accessing your data and using the machine if one drive happens to fail. Select the two disks you want to use in the array. 7TB) on a physical Supermicro server with Intel(R) Xeon(R) CPU E5-2620 v4 @ 2. mkfs. This will cover a whole range of risks that Btrfs—short for "B-Tree File System" and frequently pronounced "butter" or "butter eff ess"—is the most advanced filesystem present in the mainline Linux kernel. There . For RAID 10, this is because the data Luckily I already settled for raid 1. Btrfs offers various allocation profiles that determine the layout of data across the disks in a filesystem. e. RAID RAID 1 consists of an exact copy (or mirror) of a set of data on two or more disks; a classic RAID 1 mirrored pair contains two disks. Inline files. Is anyone running a btrfs raid10 pool of ssds and if so have you done any kind of benchmarking to determine what (if any) performance gains there are over raid1? Trying to determine if it's worth running four Samsung 950 pro NVMe drives in a single pool or separate raid1 pools. It goes on to say that with BTRFS on both RAID1 and RAID5 you can have devices of different sizes. Personally I prefer 6 because I have a huge amount of data but do not need super-fast access to it and would like to not lose any data even if 2 disks were to fail. Then regenerate the initramfs and reboot. hm, if you don't trust btrfs on RAID-5/6, why'd you trust it on RAID-1/10? (I int btrfs_delete_raid_extent(struct btrfs_trans_handle *trans, u64 start, u64 length) You create btrfs raid 1 by going to Storage -> Filesystems. Recently it was discovered that the RAID 5/6 implementation in Btrfs is broken, due to the fact that can miscalculate parity (which is rather important in RAID 5 and RAID 6). In this case, btrfs should not be in the HOOKS or MODULES arrays. Symptoms. The driver is signed, so should work out of the box on modern versions of Windows. On the CLI: (Use drives that have been wiped in the GUI. Overview. To follow along smoothly, you can spin a virtual machine, install btrfs-progs package and add two secondary hard BTRFS is a modern copy on write file system natively supported by the Linux kernel, implementing features such as snapshots, built-in RAID and self healing via checksums for data and metadata. The Btrfs (pronounced as "better F S", [9] "butter F S", [13] a good copy of this block from another device – if internal mirroring or RAID techniques are in use. (yes I RAID support: Btrfs supports RAID arrays , which ensures data protection and fault tolerance. Lastly, I’ll provide some scripts that I use to Btrfs RAID 10: 8: 8: 8: 8: 8: 40: 20: Btrfs RAID 1: 14: 10: 10: 6: 6: 46: 23: Notes (table lines after 2019 were added after the article was published): 2015 - Made the switch from hardware RAID to Btrfs; 2016 - Btrfs RAID 6 was I never ran Btrfs RAID10, but the wiki states that it is striped (contrary to Btrfs RAID1), which means it should behave just like regular RAID10 and that the space calculator is most likely correct. raid1c3 simply means three copies, evenly distributed over all your drives. The official btrfs FAQ has a question on why it is difficult to calculate free space in btrfs. Btrfs is probably the most modern filesystem of all widely used filesystems on Linux. A 10 disk btrfs raid 1 certainly sounds iffy to me in terms of odds of random drive death(s), while on the other hand btrfs raid6 comes with its own share of problems. Moderators; 69. Preface: I have never used btrfs before so most of this is around btrfs. BTRFS RAID 1 array setup with encryption and monitoring. Total space for files: 1000: Total raw disk space: 1000: Unusable: 0: region 0; Usable: 1000: Disks/alloc: 1: The results shown here do not take account of the I was considering md raid + dm-integrity as a btrfs raid 5 replacement, but it brings ~30% performance hit, so I'm staying at btrfs raid1 for now. Sep 30, 2024 134 19 18. Storage space management: This file system manages storage space btrfs replace which is suggested, has one drawback - it does not allow to replace larger device with a smaller, even utilization is low. Depends on the number of drives being used. But I could not find a way to allocate more space from physical drives to the RAID10 volume. But RAID 10 doesn't require any parity calculations. This means that having disk sizes of 2+2+2+2+2+10 will work just fine and efficiently use all space. You will receive the sum of all hard disks, divided by two – and do not need to think on how to put them together in similar sized pairs. 46TiB devid 1 size 949. So do you possibly have a suggestion of a command line guide to setup a btrfs Raid 10 and use the great features of the btrfs filesystem? Btrfs is definitely the filesystem I would like to use. you typically remove the failing disk from the RAID array. gz Atom feed top 2025-01-09 15:15 [PATCH v3 00/14] btrfs: more RST delete fixes Johannes Thumshirn 2025-01-09 15:15 ` [PATCH v3 01/14] btrfs: selftests: correct RAID stripe-tree feature flag setting Johannes Thumshirn In this guide I will walk you through the installation procedure to get an Ubuntu 20. Raid 10 BTRFS different drive sizes <SOLVED> Don't do it! With 4 (different size 2 small / 2 large) do not use raid10 data and raid1c3 metadata. It's possible on the command line but that's another matter. My console errors looks like that: My disk configuration: So my raid configuration is probably from hardware. but does have it's own set of problems - snapshots I have four M. I can tell you that, for video streaming, going from btrfs raid 10 to raid 1 (effectively cutting my maximum sustained speeds in half for single files) made no discernible difference. Convert to to RAID 1 after adding disk to existing subvolume. 10GHz and 125GB of RAM. Create a btrfs RAID 0 array I've been running BTRFS RAID 5 for a few years, no issues even after mutilple power down tests on a loaded RAID 5 storage array. Reply reply Top 1% Rank by size . 6c352e2e-f287-445a-9cd3-d Member. Re: Raid 10 btrfs Base Install. Even the devs say to not use it. BTRFS RAID modes are all about copies, not drives. Folks who setup 10gig home networking, what do Calculating disk free space is notoriously confusing with btrfs. The Wiki Raid 5/6 Page warns of the write hole bug, stating that your data remains safe (except data written during power loss, obviously) upon unclean shutdown unless your data gets corrupted by further issues like bit-rot, drive failure etc. 5/6 is not advised. Number of devices: RAID levels. RAID 10 (automatic) When using enough devices(4) with RAID 1, Btrfs will distribute all data, so that it not only is mirrored but also striped. Only good thing, that writes to SSD are so fast, that remove is dependent only on HDD, going few GB per minute, 100% utilizing HDD drive on Many years ago, I had high hopes that btrfs would actually end up being a viable alternative to ZFS. When designing a storage solution for reliability, redundancy, and With raid10, a specific 2 GB chunk can be read from 4 disks at once. Btrfs uses its own integrated LVM, so additional storage devices can be added to an existing Btrfs filesystem dynamically. I installed Rockstor on it and aside from a few small issues (for Btrfs can use different raid levels for data and Metadata: the default (even for one disk) is raid1 for the metadata (directories etc) and raid0 for the data. Subvolumes: A BTRFS subvolume is an integral part of the Allow mounts with fewer devices than the RAID profile constraints require. Ubuntu on an 16 Core Intel with ZOL with Docker. I thought Synology has used BTRFS on their higher end NAS devices. General BTRFS advantages. Well, fortunately, this issue doesn’t affect non-parity based RAID levels such as 1 and 0 (and combinations thereof) and it Non-standard RAID: Drobo BeyondRAID, Synology Hybrid RAID, ZFS RAID-Z, Btrfs-RAID, Dell EqualLogic Storage Arrays; Custom RAID patterns: via RAID Definition If you want performance + redundancy (RAID 10), use mdadm/software raid to create the underlying volume, and stick btrfs on top of that. Btrfs here is used as data partition on separate disks, e. So, both store two copies of the data, but RAID-1 requires the If corruption is found, Btrfs attempts to recover the data from a mirrored copy if redundancy is enabled, such as in a RAID 1 or RAID 10 setup. I have a 5x4TB RAID 6 install right now and it’s been doing fine, but about to start committing family photos to it and have decided based on the state of RAID 6, I probably need to move to RAID 10 to prevent a non-recoverable failure down the road. Oct 24, 2024 #5 MountainBofh said: Raid 5 is still an issue (broken) with BTRFS. In the classic case, on 4 disks, raid 5 or 10, two disks may fall out with the loss of all data. However, some people have tried testing the supposed problems and didn't find any. My BTRFS, created in 2020, ran smoothly until now. But I thought if the BtrFS is mature enogh I’d like to take the advantage of BtrFS to detect and correct corrupted data. BTW, I still don't think I'd trust btrfs for RAID-5/6 but it's absolutely fine for RAID-1 or RAID-10 like mirrors. We run 'btrfs scrub start -B -d /data' every Sunday as a cron task. 2 drives in a btrfs RAID-10. a NAS. RAID 10 guarantees that block n is mirrored across two devices and that block n + 1 is mirrored across two different devices. answered Jun 15, 2021 at 15:36. 79. In OMV5, it's possible with mdadm RAID, BTRFS, and ZFS. Free space tree is mandatory, v1 makes some assumptions about page size. 本文详细解释了各种 Btrfs RAID 配置文件。本文向您展示了如何在 RAID-0、RAID-1、RAID-1C3、RAID-1C4、RAID-10、RAID-5 和 RAID-6 配置中设置 Btrfs RAID。您还了解了 Btrfs RAID-5 和 RAID-6 配置的一些问题，以及如何在启动时自动挂载 Btrfs RAID。 参考 Data Integrity: Btrfs uses checksums for both data and metadata, which is used for data integrity and helps detect and fix errors. Going along with the recent Linux 4. Built-in RAID support: RAID is now, more popular than ever, thanks to the unique features it offers. ZFS keeps getting better and better while btrfs seems to just struggle w/ fixing catastrophic data loss bugs. 78TiB path /dev/sdd devid 2 size 3. g. btrfs(8) for more details and the exact profile capabilities and constraints. A rename of the feature would be a good idea, IMO. Storage space management: This file system manages storage space There are faillure scenario situations in RAID 5 or 6 where you might get corrupted metadata. Reply reply leexgx • Btrfs raid 10 currently doesn't handle dual disk failures even if it's different mirror pair 5. Unfortunately I am browsing the web in search of all current BTRFS Raid5/6 Bugs and there simply isnt any way to know just how unsafe it really is. 7) mkfs with duplicate UUID on a single device, temp-fsid (kernel 6. " I'd look into standard md raid, I believe they have a write-mostly setting or something along those lines. btrfs balance start -mconvert=raid1 -dconvert=raid1 /home. Topic closed #1 2016-03-24 19:32:41. I was a bit confused since btrfs raid 1 does simillar things as raid 10 but they have that too. quca swr ivg ffqild xidx rlqxz rqroc gaasbv tfgziw cqcf