How many drives for zfs. much less a zfs replication stream".

How many drives for zfs 5 TB of Drive capacity - we expect this number to be in gigabytes (powers of 10), in-line with the way disk capacity is marked by the manufacturers. I wouldn't use RAIDZ(2) for 200-500 GB of space. This may take a while, but would give the most accurate answer possible. One for use of Media Consumption and One as a backup. ) Raidz2: 4, 6, 10, etc. Read here. Will adding the 4TB drive to the pool later be a problem of any kind? Possibly. Sad to see them no longer exist. Oracle sure isn't going to give us this data; they are more interested in putting ZFS back in the closed source box :) Also tried 3x4-8tb rz1 and 2x6-8tb in rz2 But with so many drives was hard pressed to “notice” any difference but the benchmarks the mirrors won hands down. that’s wrong. Array sizes beyond 12 disks are not recommended. More posts you may like r/selfhosted. * 2 disks as a live pool, can continue working with 1 disk failure. This number will be converted to tebibytes (powers Usually, it is considered that up to 12 disks in a single Raid-Z vDev is good. 92TiB usable space (20% free space limit) with 3x 8-drive RAIDz2 VDEVs, or 67. it also works to load When determining how many disks to use in a RAIDZ, the following configurations provide optimal performance. 6-pve1 Running on an x570 server board with Ryzen 5900X + 128GB of ECC RAM. ) SMR disks are not recommend for use with ZFS, since when ZFS rebuilds (resilvers) data during the replacement of a failed disk, it will be ~15x slower to rebuild the data onto an SMR disk compared to CMR. Understanding size of zfs pool, drives and VM disk upvotes r/Proxmox. To every new ZFS user, or someone who wants to get started with ZFS, here are my own "general" recommendations. com/roelvandepaarWith thanks & praise to God, Slog isn't meant to speed up writes but it can. No amount of drive redundancy will protect you from a catastrophic server failure such as a bad power supply or power surge frying your system. I'm not happy with 6-wide RAIDZ2. Rebuilding an array with 80TB of data on mechanical SMR drives in a raidz2 A major difference of how ZFS works in difference more traditional RAID (both software and hardware) is that zfs is not just a multi-drive manager but also a filesystem and hence it understands how blocks are used. Above that, the risk increases. 1. Where did you hear this? On ZFS, all file data is stored using B-trees, where the leaves store X bytes, where X is the value of recordsize at file creation. General parity system. com GmbH. With that said I have many (but not all) 2 to 8TB hgst drives in my zfs servers and these have had the least problems of any drive we have had over the 24+ years I have been on the job. ZFS maintains a space map of where stuff is and isn't Yeah then 2 by 9 wide would be fine in raidz3. /home) is a compromise with much less work involved. – But really, with 4 disks and knowing I'd expand to more disks in the future I'd strongly consider md over ZFS. If you want just a bare archival array, start with 8 GB of RAM, add a controller with the decent number of disks you want, then add HDD's (in my opinion 6 at a time Each ZFS block is written to only one vdev. When I failed the third drive, the pool still shows up as OK but the moment I try to import it, the command line hangs. This means that if you use a RAID card or a storage controller, you must have Inputs: RAID type - Supported RAID levels are:. With 16TB drives and URE rates of one in 10 14 or 10 15, the odds are not in Z1's favor. The host is proxmox 7. With the sale of 18TB drives, I'm looking to expand, but struggling to land on a new ZFS topology. I have been googling, but can't find any setups explaining if you need zil, slogs or even arc with an SSD setup. If you have a backup of your data, or if the data solution will be "Write once, read multiple times", then you probably don't need ECC RAM. ZFS integrates file system and device management in such a way that the file system's metadata has enough information about the underlying data redundancy model to handle variable-width RAID stripes. I was aiming on having the 16GB Optane NvME as the 'boot/OS' drive with the SATA SSD as the 'data' drive for VM disks. It does not cause drive failures more than other filesystems. I very much disagree with this. ; Drive capacity - we expect this number to be in gigabytes (powers of 10), in-line with the way disk capacity is marked by 31K subscribers in the zfs community. Don't underestimate with MANY times smaller drives with 4-5x the rebuild speed and a more efficient (less reads what's the use case / access method for the 1PB of data? one option is Minio, which is compatible with the S3 API, and has support for erasure coding (the same mathematical concept that underlies raidz2/z3) . A zpool created from 4 disks in two striped mirror-vdevs will last until two disks in the same How many drives do I need for ZFS RAID-Z2?Helpful? Please support me on Patreon: https://www. If you want “a bunch of storage” for things like movies and photos, you might start with 6 drives in raidz2, 4 drives useable, 2 for redundancy. If you have quite a lot of drives, create multiple vdevs with raidz2 and create a pool out of all vdevs. I created a 32 drive ZFS dRAID draid2:8d:32c:0s just to test redundancy. I want to host VM's and store large 4k linux ISOs in the pool. Still, there's a bunch of redundancy in there, a full third of the drives can fail. Since ZFS implements the whole stack, physical disks to the file, it can provide much more. Or deleting it and recreating it. If you have many drives, test each one individually and put the "fast" ones in one raid and the The installer automatically partitions the disks, creates a ZFS pool called rpool, and installs the root file system on the ZFS subvolume rpool/ROOT/pve-1. But at the cost of 50% of your storage and a higher risk of losing the pool compared to RAIDZ2 (with multiple mirrored vdevs, if both failed drives occur in the same vdev, you lose the pool and will have to restore from a backup) Hi guys, I'm a zfs noob and need some advice on setting up zfs for my use case. However, it does not provide redundancy. The other two do not offer all these features. : Raidz: 3, 5, 9, etc. 25% chance you'll lose data in a year. This subreddit has gone Restricted and reference-only Calculator to determine usable ZFS capacity and other ZFS pool metrics, and to compare storage pool layouts. But theoretically ZFS should report the pool as failing, and the missing disk should still show up in the topography unless you intentionally or somehow accidentally Resilvering one faulted drive in a raidz2 is safer than resilvering a mirror. ZFS roughly requires 4GB of RAM / TB of space for deduplication tables. Parity scheme: Single parity (similar to RAID-5). This tolerates any two disk failures. A zpool created from 4 or more disks in a raidz2-vdev will last until three disks fail. 3x12TB in Z1 is fine, just be aware of future expansion limitations. Within a “raid” vdev, a single block is either striped across disks (if large) or mirrored across disks (if small, size <= 2 ashift). Every write is a full stripe write, but the stripe width (number of disks) itself is variable and RAID-Z vs RAID-Z2 vs RAID-Z3 RAID-Z. So, I could grow my 6x4TB RAID-Z2 array by replacing each drive with an 8TB drive, and allowing it to rebuild each time I swap out a drive. There would be a clear warning that the data contained on the drives would be lost due to Smart Can anyone point me to a best practices guide for ZFS SSD pool setup. But having an ext4 or BTRFS boot drive and using ZFS for other drives (e. Therefore ZFS can tell if the data on one disk is wrong and restore it from a good one. This would mean you have no redundancy whatsoever. For raidz3, do not use less than 7 disks, nor more than 15 disks in each vdev (13 & 15 are typical average). Here are the commands for installing ZFS on some of the most popular Linux distributions. Using multiple mirrored (2-, 3- or N-way) vdevs gives you the combined iops performance of all vdevs and especially for My current server (24-bay chassis) consists of 4x 6-wide RAIDZ2 vdevs with 10TB drives. For 12-wide I'd have to make a single 12-wide vdev with a mix of 16TB and 12TB drives, and then replace out the 12TBs as time and funds allowed. I would either use a single 500 GB-1TB drive or if I really wanted the availability of online redundancy I would use two drives in a ZFS-mirror. (2+1, 4+1, etc. This is a substantial improvement in protection from drive failure with ZFS/Z1 - the RAID5 equivalent. Personally, I have a ZFS box with 32GB of memory, 280GB of L2ARC SSD caching (3 120GB SSD disks limited to 96GB), and a 16TB (usable) ZFS mirror array (12 3TB 7200RPM SATA disks). You can use other drives, but they may act really cranky when they start getting errors and it's time to replace a disk. Mirror (two-way mirror - RAID1 / RAID10 equivalent);; RAID-Z1 (single parity with variable stripe width);; RAID-Z2 (double parity with variable stripe width);; RAID-Z3 (triple parity with variable stripe width). The configuration I'm aiming for involves 15 drives, each with a capacity of 20TB. The 4th partition would be the same size as your largest partition in use. Yatti420 Wizard. IMHO, use the additional disks for backups, not for higher redundancy. I am thinking a 4 disk array with 1 disk redundancy. But being not part of the Hello everyone, I'm currently in the process of planning a new NAS build and I have a question regarding the optimal approach for setting up ZFS. Now you're wasting even more space. r/Proxmox. Will I be able to attach it to my NAS, install ZFS on it’s drives (I assume the actual ZFS will get installed on my NAS and just use the drives provided by Qnap TL-D800C as just normal drives or JBOD), mount that ZFS volume, rsync my NAS to it, unmount it, and detach the Qnap TL-D800C from my NAS. This may sound complicated, but it is fairly intuitive to configure and manage (especially when using Houston UI for your server's management). There are constraints. Should I get 1 NAS Type Drive and have my Media on that, while I will have a copy of the media on a external drive separate from the NAS system. However, 'Optimal' for ZFS parity raid is always a 'power of 2' + redundant, i. If you had for example 3 pools being used (hopefully roughly the same size) you would create 4 partitions. I will be using 12 TB WD reds (shucked) around 6 - 9 disks depending on what is the best practice. My personal needs involve a separate backup, so I have a NAS with 2×4TB mirrored on which I store deduplicated backups (not ZFS), and a workstation where I use 2×4TB (mirrored, ZFS, partially backed up) for bulk data. I am a n00b to ZFS (am migrating from Synology). What this gives you is a working area. 17TiB with 4x 6-drive RAIDz2 VDEVs. It wastes too much space and I don't need the performance. And similar for reads, though you have to depend on luck about where they were written. Z2 and Z3, on the other hand, are fine. many people dont like the raidz1 with drives bigger than 4tb bc in the event of a failure + resilver the odds of another drive dying go up considerably. It is worth noting that a future version of zfs will have the ability to expand an existing raidz vdev by I'm familiar with the adage of 1GB ram per 1TB of drive in ZFS, but I know that isn't something set in stone. If you are creating a RAID-Z configuration with many disks, consider splitting the disks into multiple groupings. This RAID level can be created as a Software RAID or Hardware RAID. Fault tolerance: Protects against the failure of 1 disk. say for example, you have a disk go bad, you pull it out, put in a new one. What I get from this: As If you shove 6 drives into a RAIDZ2, you'll get about the same raw IOPs as a single drive, but you'll get many times the throughput for linear work. While you can create Pools Instead of replacing the drive, I wanted to learn and take a crack at building my own DIY NAS. If you have many drives, go for raidz2. For most used cases a Raidz2 of 7 drives - while not optimal - will perform just fine. Oh, and use the ASIZE column for your measurements. I'm sitting at 95% used and one of the drives is faulted. Unraid's big selling point is in the name, they built a novel file system that is not traditional raid and as such can be much more flexible in the variety of disks it can mash together. The RAIDZ-level indicates how many arbitrary disks can fail without losing data. I know this will be unpopular: I've been running a home server relying on external USB drives for more than 7 years now. For example, a RAID-Z Yes, this is a pool consisting of 6 12-drive raidz2 vdevs, and the drives I replaced are (coincidentally) all in different vdevs, so it's not an issue of being able to only resilver one drive per vdev at a time. These drives get monitored, are properly ventilated, and get a monthly scrub. How should I set this up? Should I expand RAIDz is the ZFS equivalent of traditional parity-based RAID. For that use, the optimal number is usually "as many disks as you can", up to whatever the limit of disks in a vdev is (maybe around 12-14 for raidz2). I'd avoid Z1, because rebuilding ("resilvering", in ZFS terms) requires every single bit to be read perfectly from all remaining drives if one fails. The geometry of the array is set when you first build it. and a LSI SAS9300-8e: LSI SAS9300-8e 9300-8e PCIe x8 2x That experience with zfs convinced me to go raidz2 after having attempted to expand my 80TB raid array for giggles from 4 to 8 disks using an lsi 9361-8i 12GB/s sas but you can have fast simultaneous writes for as many as you have disks. At the moment the VM disk space is the default root/data dataset (I think) - so I either want to just move that to a different physical drive or span that dataset across 2 drives (not sure if I'm making sense - in LVM world, I just added the disk . 2 disks for backup storage, so can recover up to 3 failures. No CPU load, no memory load, just the console freezes. ). If I have 8 disk and I don't care how many volumes to have, what is the best scenario? 1. That's nonsense. Matt Arhens, one of the people who actually wrote ZFS, says random IOPS performance gets worse in raidz vdevs the more disks you use. ZFS/Z2 maintains its data integrity if two drives fail. With such huge mechanical (likely SMR) drives, and this number of drives (4), parity RAID is a terrible idea from both a safety and performance standpoint and especially in the event of a resilver. For raidz2, do not use less than 6 disks, nor more than 10 disks in each vdev (8 is a typical average). In this situation it is usually better to use 2 mirror vdevs Yes, IO is spread across all of the disks, but for a read or write operation that goes across all drives, zfs has to wait until each drive has finished; so the limiting factor is (in the worst case) always the slowest drive. the most frequent Actual test with ZFS DRAID. You can however, grow the capacity vertically by adding larger drives one by one. SLOGs were developed when both pool disks and SLOG disks were rotating media and comparable in speed. A zpool created from 3 or more disks in a raidz-vdev will last until two disks fail. create one ZFS raidz1 volume over 3 disks; create another ZFS raidz1 volume over 5 disks Any CON and PRO? Thanks. This is great for most basic media storage, but you shouldn’t throw too many drives into a standard RAID5 setup as 11 drives means you would have 10 times the storage of a single drive, but 2 disks popping would take out the PROTIP: for ZFS I use NAS drives from WD and Seagate. 3 with zfs-2. Direct access to drives - ZFS can only work correctly if it can directly see and write to drives. With 3 raidz1 People often talk about the theoretical benefits of ZFS and how it takes (RAIDZ1/2) hard disk failures easily, and Server Fault has many testaments to this fact. Then I will go with 8 drive z2, thanks! Now I am planning to use a either a netapp shelf or a HP 19" M6720 Storage 24x 3,5" LFF HDD SSD 2x JBOD 6G SAS SATA Controller 4x SFF-8088 2x PSU (TrueNas ZFS, Ceph, NAS, SAN) - Serverschmiede. A 6 disk RAIDZ could quite conceivably reach linear throughput speeds of around 1GB/s with individual drives at or around 200MB/s. Mirrored SSDs are preferable to RAID That is an urban legend, and has been disproven many times by ZFS developers. 12 drive raidz2 with 16 tb drives will take a long long time to The number defines how many disks can fail without losing data. With ZFS, your only "reasonable" expansion option will be another vdev of 4 disks. If you want max space you could do raidz2 but z3 is safer. . 5 Best Practices for ZFS. When a write is done to a file in a dataset with dedup=on, a lookup is done on the data deduplication table. patreon. so I know it's not stressing my drives out unnecessarily. I've got 24 6TB drives to work with. Here are the Determine the usable capacity and other metrics of a ZFS storage pool and compare layouts including stripe, mirror, RAIDZ1, RAIDZ2, RAIDZ3, and dRAID. Tip: Replace by attaching the 9th drive without unplugging the failing drive. Also, for 10 to 12 drives, Raid-Z3 may be of interest. How Many Drives Are Needed for RAID 5? Minimum & Maximum Explained; RAID 6 Drive Failure Tolerance: How Many Drives Can Fail? ZFS RAID Expansion: How to Expand RAIDZ and ZFS Pools Safely; How to Recover Data from a Broken RAID 1 Set – Step-by-Step Guide; RAID 0, 1, 5, 10 Explained: Performance, Redundancy & Best RAID Configurations Can I use multiple physical drives as a ZIL/SLOG for my 1 pool? Should I? How? How many? Reminder that these are 16 GB drives and most of the available slots run over 1x PCIe lane. That is supposed to provide better IO performance and faster resilver to replace a failed drive or expand a vdev. RAIDZ2 with minimum of 4 drives will give you better protection and strongly recommended. Installing the package and creating a pool is all you need then. Level 0 ZFS Plain File and Level 0 zvol objects do NOT go to the metadata SSD, but everything else would. I was planning on using zfs raidz2 just incase one or two disks die. This tolerates any one disk failure. You sound like you might not be super familiar with all the options. Running the numbers on wintelguy's ZFS calculator resulted in an estimated 71. Keep in mind, non-ECC memory won't damage your data when you scrub your zpool (). Unless you are chasing very high performance and absolutely minimal wasted space it doesn't matter a lot. Only migrated to a ZFS raidz2 a few months ago and love it. It might not be as fast and efficient as replicated ZFS snapshots, but it looks like your data would be protected sufficiently. 0. S3510, S3610, S3710, etc) or Pxyzz for NVMe (ie. The nor can you add additional drives to scale the array horizontally. Reply More posts you may like. With Linux's md, your 4x raid5 could become 5x raid5, then 6x raid6. i for get how the numbers work exactly, something about remaining sectors, 10^14th, and 10tb drives pretty much is guaranteed to hit a bad sector. ZFS is painful to expand by adding few drives at the time. 2 slot). I'm seeking advice on the most effective way to arrange these drives What is RAID 0? RAID 0 (zero) is a RAID level that combines at least two hard disks (HDDs or SSD) to form one logical storage volume that stores new data using a “striping” technique. At that time I plan on purchasing a second HBA and a new array of larger drives. Then when you need more capacity, replace all 6 drives one by one with bigger ones , and when you are done, you have the added capacity. How linearly do RAM requirements scale with ZFS volume size? I'd be For two disks, you want mirror mode. 5%. Total Disks in Pool: Add Disk (TB):-100-10-1 +1 +10 +100: Add Disk: TB/GB: Minimum Spares: OpenZFS 2. much less a zfs replication stream". Then use the largest recordsize you can get away with. 1 failed drive, 2x replacement due to size-up, SMART support (running scrunity), surge-protected. I am in a similar position. create one ZFS raidz1 volume over 8 disks 2. A place to share, discuss, discover, assist with, gain assistance for, and critique You bamboozled ZFS into thinking you had 3 drives, created a pool, offlined that fake drive and now you have 2 drives. Currently, the only (sane) ways to expand a zfs pool are A) building a new vdev, which should be the same type of vdev with the same number of disks, or B) replacing every disk in a vdev with a bigger one. e. A special case is a 4 disk pool with RAIDZ2. I am considering setting up a NAS with 3-5 hard drives using FreeNAS, and I might be backing up important documents nightly, so I can't take more than a week of downtime. This means stripes will almost always be non-aligned forcing the underlying device to use internal processing time which will slightly degrade write performance. d1 should probably be fine aswell as rebuild times are vastly faster in draid than raid z. Should I get 2 NAS Type Drive, for this I would like to setup the configuration where both drives have the identical data. Mar 1, 2016 #2 I use a 6x2TB. during the resilver, one of the older-good drives hits a bad sector. But I read that with raidz2 the performance is about the same as a After studying the materials for a few more times, I can confirm that the theoretical maximum of supported vdevs in RAID-Z2 is 255+2 vdevs. 8x4TB WD RE "Black" 7200RPM Drives ZFS raidz2 - Supermicro X9SCL-F - Intel E3-1230v2 Quad-Core 3. I am going to be upgrading my nas to have 8 18tb disks. So, RAID 0 supports data striping across multiple used in the array configuration. g. 7 Slop: RAID 0 (striping) in ZFS is designed for performance, as it spreads data across multiple disks, which allows for faster read and write speeds. At some time in the future I will have to increase my storage capacity. I was looking at RaidZ2, but I seem to find conflicting Thus, assuming only a simultaneous 3-drive failure can destroy your raidz2 array and you are diligent in replacing failing drives, there is a 0. Sorry about the slow reply from my side. Maybe there is some ZDB magic that can help, but creating a RAID 0 HP Logical Drive is a pretty deliberate action. This will cause the drives to be exact images of each other. 7 disks: Unclear, seems like 7 is just a really bad ZFS disk count: 7-wide Z1 at 84% is not reliable enough, RAIDZ2 still at 66. I don't remember off hand where I saw the summary, but someone put together a table with something like RAIDZ, RAIDZ2, RAIDZ3 for up to 20 disks each, calculating the overhead for each combination. I want a balance between space and performance but prefer more space. While you may be able to get it working on a 32-bit kernel, you're gonna run into some stability issues, and that's because the way that CFS handles virtual memory address space. For 32 drives, I'd generally recommend one of the following: 15 2-wide mirrors + 2 spares 8 4-wide Z2 3 10-wide Z2 + 2 spares That's in order of decreasing performance. so you could potentially do individual drives (or individual mirrors, if you want belt-and-suspenders), and then allow Minio to handle the replication. NVMe drives formatted to 4096k This section assumes that you're using ext4 or some other file system and would like to use ZFS for some secondary hard drives. When I failed 2 drives, I could still import the pool. Basically, RAID is an Once of my favorite tricks with ZFS is the use of multiple partitions (drives some people crazy). Make sure you're not buying SMR drives. For now you want to add as many drives at once as you can. It is possible to support a far greater number of drives by choosing the parity function more carefully. So to upgrade, you'll have to buy 3 new drives for the raidz1 setup or 4 for the raidz2. Data layout: ZFS arranges blocks across all drives (except one in each write group is used for parity) to provide redundancy. After which I'd upgrade the 4TB vdev to 12TB vdev via drive replacement with the decommissioned drives, and add a third 1x 8-wide 8TB vdev using the rest of the decomissioned drives. now you have just lost everything. No, there's no reason to have multiple pools for redundancy. Currently I have just two separate disks in there simply using ext4. ZFS (without deduplication) doesn’t need (much) more ram than other file systems, but of course, the more of a spinning disk you can store in memory, I read from the wiki that ZFS raidz1 starts with 3 disks and works best with 8 disks. Over provision it to 16-32 GB? L2arc use nvme and depending on your data usage, record size you might be able to get a decent one but it depends on a lot of things for sure. The biggest things fr a data safety perspective ist the vhecksumming of everything. For Intel, that means their DC series. And repeat in a week (i. I would only consider any form of parity raid when I needed more storage than I can get in a single drive at reasonable $/TB. Further reading to the following section in the Wikipedia,. 8 disks: RAIDZ2 at 71%, 2x4-RAIDZ1 at 72. attach, mount, rsync, unmount, How Many Drives Are Needed for RAID 5? Minimum & Maximum Explained; RAID 6 Drive Failure Tolerance: How Many Drives Can Fail? ZFS RAID Expansion: How to Expand RAIDZ and ZFS Pools Safely; How to Recover Data from a Broken RAID 1 Set – Step-by-Step Guide; RAID 0, 1, 5, 10 Explained: Performance, Redundancy & Best RAID Configurations With so many drives I'd do d2:8:c1 draid in zfs has some recovery advantage with such big drives I'd do that. It is all explained in various posts. Create a Storage Pool: Use the zpool create Best Practices for RAID 1 with Different Size Drives in ZFS. I'd much rather have a weekly scrub that pushes my drives to 25% usage than a For PLP drives, you'll want to take a look at pretty much any enterprise SSD. My 3 x 2TB drives give me approx 3. We also need to check for the sector sizes these drives support. And, of course there's backup. Click on the So to upgrade, you'll have to buy 3 new drives for the raidz1 setup or 4 for the raidz2. Check out this article on I am new to using ZFS and need some advice on choosing how large my VDEV or multiple VDEVS should be. Reply reply Top 4% Rank by size . 5% getting a bit risky raid6/raidz2 and up and instead use 1-2 global hot spares for immediate restoration of redundancy without loosing too much drives. How does With 11 disks, I'd go with the single Z3 vdev or the two Z2 vdevs. These are now tested and shucked ready to go into my SCALE box. Joined Aug 12, 2012 Messages 1,437. Follow best practices. I'm a bit of a noob when it comes to ZFS, and how many drives are needed for RaidZ1 and RaidZ2. 6 months from now if From work experience and a couple of hundred TB I would say no. RAIDZ2 with 6 disks is also a sweet spot for low disk usage overhead, besides not putting too much stress on the remaining disks in case of a resilver. Reply reply dlm2137 raidz1, and raid5 suppfer from "URE" and write-hole. ZFS (unlike btrfs) is production-ready and won't fail you. @Jan-PhilipGehrcke Yes. So you're always going to want to install ZFS on a 64-bit kernel. RAM ECC RAM. When setting up RAID 1 (mirroring) with different Also, you cannot just add drives to a ZFS pool. 1352 3 = 0. Sxyzz for SATA (i. O . I <3 and use ZFS If you value your data, ZFS is built around data integrity with; checksums, copy on write, scrubs and snapshots. Use optane drives with on-board power loss protection. zfs will drop the replaced drive automatically after resilvering is done. The more drives in the vDev, the more often many of them will Configuring a ZFS RAID array with different-sized drives can be a practical solution for many users, but it comes with its own set of challenges and considerations. Three-way ZFS mirror has literally saved my butt at least a half-dozen times over the last 14 years. (Three drives gives you two drives of usable space, five drives gives you 4 drives of usable space, etc. r/selfhosted. If ZFS tries to read a block of data from the drive and it fails verification, then ZFS will When using drives for ZFS, you need to utilize their actual drive names or WWNs. Start a RAIDZ1 at at 3, 5, or 9, disks. Mostly due to budget and available parts, and low power consumption. So most operations tend to only get done on used blocks after all no matter the actual size or capacity. The problem (which i understand is fairly common) is that performance of a single NVMe drive on zfs vs ext4 is atrocious. What you SHOULD do though is make sure to use either mirrored vdevs (3x2) or a raidz vdev (like raid5/raid6) to avoid data loss in case data gets corrupted on the drive itself. Assuming the drives are all the same size, a mirror array has the same usable size as 1 drive (no matter how many disks you use), whereas RAIDZ has N-1 drives of usable space. I hope they will get the reflow implemented some day. But I have read from somewhere that too many mirror vdevs in a pool actually hurts the performance of the pool. 3Ghz LSI 9211-8i - 32 GB DDR3-1600 ECC - HP On my private data, I was running a 2x8TB mirror and converted that to a 3 drive RAIDz1, doubling available storage with adding a single drive. Yes, I am an Since the drive lied, ZFS will incorrectly make stripes aligned to 512 bytes. (2+2, etc. ZFS INSTALLS: Alright, so for best practice number one we're going to talk about ZFS installs. If anyone has any comments on the build in general or how many drives I should go with it would be much appreciated. The simplest configuration has 2 drives using an x1 lane(in the 2 x1 slots) and 1 using 2x lanes(in the second m. qgv mseittgq vcmpdxs rwmcbi fpaloys baiotzw weec fjzas amino thwkoq ynrya nxpf unkvuyqh dohwvt fhfau