Striped mirrored vdev. This was done by calling “mirror sde sdf”.

Striped mirrored vdev I've got a multi mirror vdev pool made up as follows. If so, first setup first pair in mirror, and then you can add another mirrored vdev in stripe after you copy your data to the new pool. For corporate settings using 24-bay disk shelves I like 8-drive miror vdev pools. If you lose two disks from the same mirror, then that pool is gone. To create a mirrored pool, use the mirror keyword, followed by any number of storage devices that will comprise the mirror. The dropped? drive does show up if I attempt to add a vdev, but cannot add it as a mirror - TL;DR: I have a mirror vdev; what would you do to expand this. – We'll start by picking a less-than-ideal RAIDZ vdev layout so we can see the impact of all the various forms of ZFS overhead. , I used to run 2-wide mirrors with 1TB drives in my pool while mixing in 3-wide for 4TB and up. You create a bunch of mirrored pairs, and then stripe data across those mirrors. You should have 2 pools in this scenario. So in a large vdev, to replace a single busted disk, ALL of the members are going to be stressed. Fortunately, If you think about it a bit, that makes sense--when you replace a drive in a vdev, ZFS restores the appropriate data to that drive based on what's on the redundant (mirrored or RAIDZ) devices. Joined Aug 19, 2017 Messages 1,556. Increasing TrueNAS SCALE ARC Size beyond the default 50% Do you have an SLOG Clearly the use case is what matters and 1 in 3 new users here (my gut feeling) want a nextcloud instance or a plex media server up in running, so in both usecases a 2-way-mirrored vdev pool of no matter the drive count, is always the better choice, according to the numbers above. VDev with 2x 3TB HDD - Stripe - for not so important data like game library; The 250 GB SSD I would use for cache and the 1TB HDD I have still no idea what to use for. Fortunately, I bought an 8TB drive, but there's no way for me to get 8TB of usable space while retaining the same level of redundancy. You should always use mirrored VDEVs as a default choice. That is not going to happen, at least not all the time Note that this only works for pools with only mirror or stripe vdevs - you cannot remove a vdev from a pool if a RAIDZ vdev exists. That's exactly how you do it. In that case, you can lose 1 disk per vdev. A pool is a collection of vdevs. A vdev is a virtual device. In a striped vdev, you have no redundancy, so ZFS wouldn't be able to restore the data to the new disk. 92TB Toshiba THNSN81Q92CSE/HK4R (SATA SSDs) in a striped/mirrored VDEV to store "apps" and databases. Loosing any vdev in a pool is complete data loss. Vdevs can be mirror vdevs (any number of disks, all of which contain the exact same blocks) or they can be RAIDz vdevs (disks arranged in a striped parity array with 1, 2, or 3 blocks of parity per stripe). ZFS supports following basic RAID vdev types: Stripe (RAID0) Mirror (RAID1) RAIDZ (Single Parity RAIDZ) RAIDZ2 (Double Parity RAIDZ) RAIDZ3 (Triple Parity RAIDZ) Note. Don’t forget to cleanup before continuing: With that in mind I'm considering 4 striped 3 drive RAIDZ-1 vdevs. Instead, if I create a 2-disk raid-z1 now, my thinking goes, I'll be able to add drives to the vdev in the future (trusting that the feature will be available by then). I have 5 hdd's with 3 vdev on it 2 vdev are mirror, the third with 1 stripe hdd. Don’t forget to cleanup before continuing: # zpool destroy tank File VDEVs. Then remove (in the gui) the first. 9G 7. It is 1 vdev with the 2 disks in it, otherwise nothing is being mirrored. Services; Acelerators; STRIPED VDEV. 3 MIRRORED VDEV A mirrored vdev consists of two or more disks. Stripe writes are atomic, the vdev is always consistent, and Bob's your uncle. Replicate the I would like to create a mirror pool with a first 16TB stripe vdev and a second mirror of the first one, also 16TB. Raid 1+0 has the fastest IO you can get with spinning rust and still have some redundancy If both 18 go, you loose it all. Lose two drives in the same vdev and you're toast. Mar 24, 2016 #10 You can mitigate the risk by going with 3-way mirrors. If you are unsure then it's easy - just go with miror vdevs. With striped mirrors the risk is just one other disk. Again, I can’t verify this as I don’t have the time to test it, but This is the reason why I run striped mirrors. Read and write are both super solid. If you can do all your rendering in these 6 TB, you don’t need any special vdev for the slow HDD storage. You have to write the data as a striped Mirror to get the performance and data balancing of 2 vDevs. What am I missing? Here's my disk setup: https: If so, first setup first pair in mirror, and then you can add another mirrored vdev in stripe after you copy your data to the new pool. However, the + ability to quickly grow a mirror vdev after replacing just 2 drives - lower space efficiency So I'm undecided between raidz2 over 2 mirror stripes (4 disks total) gpsguy Active Member. com. create a new pool with 2 mirrored vdevs, a stripe vdev, a mirror of metadata vdevs, replicate data from a "broken" mirrored pool to the new pool and then attach the remaining disk from the 4x12TB as striped mirror, or RAIDZ2 (same efficiency, but some pros if you want to expand later, IOPS, resilvering) 2x P1600X mirrored as special vDev for the metadata. This added the special vdev, striped and mirrored, just like you'd imagine. To create it in the UI, add 2 disks to a data VDEV to create the first 2-way mirror, and then duplicate that VDEV for the 2nd stripe of 2-way mirrors. For example, for a while I operated a pool Striped mirrored vdevs. Drive loss ability = 2 After reading the risks of RAIDZ1, I eliminated that from consideration since data redundancy is very important for me. mirrored metadata vdev) Reactions: dakotta. If this feature were implemented, I'd be able to create a mirror with two children - the 8TB vdev, and a "striped" (or whatever we call it) vdev that in turn had the two 4TB drive vdevs as children. Now again, this is only in a VM, so I have zero performance benchmarks or implications. 0) - mirrored; Storage Pool: 4x 16-18TB in ZFS pool - striped mirrored vDev. Jun 15, 2018 #2 Striped mirrors will outperform mirrors and RAID-Z in both sequential, and random reads and writes. The reason I'm not confident in this is that I feel like there should be a way to create another mirrored vdev and then combine the two into a striped zpool. And, to retain the stripped mirror setup, another mirrored pair vdev. A mirrored pair VDEV:-Maximizes the amount of VDEVs you have. This was done by calling “mirror sdg sdh”. $104. Later, ZFS allowed more drives to mirror to secure and protect the system from data loss. A vdev is a collection of disks. That is not going to happen, at least not all the time. Because VDEVs are always dynamically striped, “mirror-0” and “mirror-1” are striped, thus creating the RAID-1+0 setup. zpool create -n poolname /dev/sdb I have 5 hdd's with 3 vdev on it 2 vdev are mirror, the third with 1 stripe hdd. Jan 24, 2022 #3 Even with 2 HDD the only option other than "stripe" is "mirror" but the "Create" If you think about it a bit, that makes sense--when you replace a drive in a vdev, ZFS restores the appropriate data to that drive based on what's on the redundant (mirrored or RAIDZ) devices. It only gives me Stripe, Log, Cache, and Spare. I suggest you turn the metadata vdev disks into something more useful Reply reply TroubledEmo • I don‘t really know what I could use them for to be honest. By combining multiple vdev types in the storage pool, ZFS will automatically do stripping between them. Add your 2nd disk as a VDev. I'm building a new system for a small data warehouse and have been testing disk performance in various zpool configurations using up to 14 drives. The additional space is immediately available to any datasets within the 1) Two mirrors, one mirror each into a pool. 2 drives as my VM storage which I plan to run as a striped mirror. (In this case, between each of your 11 mirrors). I have created the following diagram of it. The SATA SSDs can serve an app/VM pool. 25T 63. – This RAIDZ calculator computes zpool characteristics given the number of disk groups, the number of disks in the group, the disk capacity, and the array type both for groups and for combining. I noticed today that one of my drives is missing from one of the vdev's in the pool. Have two new drives. Every configuration seems to be performing as expected except for sequential reads across mirror sets. Hi all, I'm going to be using 4x 1TB NVMe M. A mirrored vdev stores an exact copy of all the data written to it on each one of its drives. How is the pool expanded in this way? I assume resilvering is required. Additional context When striping raidz2 vdevs together each vdev can survive the loss of two of its members. How can I proceed to create such a disk array to have the performance of the stripe and the redundancy of the mirror? Home accents, Mirrors, VdeV. Then mirror that. E. Second disk you have a 85 % rate (any of the 6 remaining disks that are not part of the vdev that already suffered a loss may fail) and so forth until each mirror lost a member disk. This is the best performing RAID level for small random reads. I'm at a point where I will need to add storage to one of my zpools soon and I'm wanting to go from my standard 2-disk mirror to a 4-disk striped mirror. You have to mirror at the vdev level, then stripe the mirrors. Might even have to replicate a I currently have my Proxmox boot drive as a pair of 980 Pro 1tbs in RAID1 ZFS. At least 4 disks. Not sure if L2ARC really helps you, since you have to warm it up first. I also keep a 1 drive spare in the pool. Other than a spare, SLOG and L2ARC in your hybrid pool, do not mix VDEVs in a single pool. A mirror vdev mirrored to another mirror vdev, is that what you want? Then just do a single vdev 4-way mirrored. Jun 15, 2018 #2 You can't do this from the UI, but it can be done from the shell. My current simple pool layout looks like: root@truenas:~# zpool status zhdd pool: zhdd state: ONLINE config: NAME STATE READ WRITE CKSUM zhdd ONLINE 0 0 0 42238b1c-7028-4d9b-9b0d-852e9ff41811 ONLINE 0 0 0 RAID10 or Striped Mirrored Vdev. Begin by creating a mirror of two drives, and then extending the mirror by adding another mirror of two drives. Moderator. It spun for a minute, and then the vdev magically turned into a mirror and started resilvering: That's what I wanted in this case, but would be nice to have known before I had to just place a bet :) Reply reply &nbsp; &nbsp; TOPICS Striped Mirrored Vdev’s (RAID10) This is very similar to RAID10. mirror ada0/ada1, ada2/ada3ada12/ada13, then create a raidz3 on The second VDEV is “mirror-1” which is managing /dev/sdg and /dev/sdh. If I understand My current build is using 8 x 1. 2x Samsung SSD 850 PRO 512 GB (storage pool - mirrored metadata vdev) Cloudified Dabbler. I see, you thought I had a single zpool with 2 vdevs and each vdev mirror of the other, so one disk dying would kill the vdev, but I don’t think it would kill the pool. This was done by calling “mirror sde sdf”. I've tried so by adding a new hard drive to that machine and trying the following: zpool create Shared mirror gptid/da39d3e5-c48b-11e2-bb6d-f46d042cc584 gptid/85ad335c-5c27-11e2-9d8a-f46d042cc584 invalid vdev In general, a 2-way mirror will get you to about 99. Another vdev will be created using the second HDD. Then test what read speeds you achieve. My current build is using 8 x 1. Currently, 1 Mirrored Vdev 1 Mirrored Vdev 1 Mirrored Vdev 1 Mirrored Vdev With the OS installed across all of them, After an apt-get dist-upgrade, This is part of the magic of striped mirrors, aka RAID10. You could, for example, create 2 vdev's of raidz2, and instead of striping them together, mirror them. Vdevs can be any of the following (and more, but we’re keeping this relatively simple): 1. I currently have 2 3TB VDEVs that are striped providing a pool 6TB is size. Multiple mirrors can be specified by repeating the . That is because it would break the striped vdevs You do not setup how they mount. As we know, Hi! I have a 6TB pool that consists of 4x 3TB drives. With stripes and mirrors you can add and remove vdevs though. And you should now have a mirror. Initially, RAID-1 mirrors supported two drives to mirror the data. For example, if your record size is 100MiB, your file will be written to just one block, on one VDEV, and will be read back from just the two drives. Supported RAIDZ levels are mirror, stripe, RAIDZ1, RAIDZ2, RAIDZ3. Edit: Reply is correct, ignore my post. do I just detach the second drive from the command line and then add it to the first drive as a striped pool or do I export the pool and only import a single drive? It is 1 vdev with the 2 disks in it, otherwise nothing is being mirrored. Could somebody please either correct my One of the benefits of mirroring in terms of upgrading is that you can also adjust your mirror width per vdev. Search for: X +(1) 647-467-4396; hello@knoldus. Joined Jan 21, 2022 Messages 42. I know I could simply chuck 2 drives in and add them to the pool as a mirrored vdev, but I'm finding that since ZFS doesn't rebalance data, the only real gains I'll get is in added capacity. So even one A drive constituting the mirrored vdev stores the exact copy of all the data of each file. You are trying to stripe in a stripe. First, will ZFS treat those two vdevs as stripes and not jbod/concat? Second, if it does treat them as striped, then later when I add another vdev consisting of a new mirrored pair of 4TB drives, will ZFS be able to theoretically increase the Clearly this is not useful as a top-level vdev, as ZFS already distributes writes across available vdevs. That means ZFS will balance out the blocks it writes between each vdev in a pool. You think this is a viable configuration or would you setup differently, maybe with RaidZ1 or RaidZ2? Any Using multiple mirror vdevs is not an issue for zfs - at all. I'm pretty sure a 3 disk RAIDZ-1 vdev is still decently robust? This is plausable. Data is dynamically striped across both disks. That should evacuate the contents of the first VDev onto the second VDev. I'm trying to add another disk to my existing pool to convert the single stripe vdev to a mirror vdev. 2 Optane) and plan to use those for my databases/apps in a similar striped/mirrored VDEV I currently have a pair of WD Red 2tb drives in a mirror pool running freenas 11. So, long story short, the more vdevs, the higher the performance. 0 releases. To make a stripe of two 3-drive RAIDZ1 VDEVs The metadata vdev will not be appreciably faster than the main data vdevs - so the whole things is basically pointless. But less reliable. If one VDEV is a mirror, all VDEVs should be mirrors. And it uses up ARC. Example 1: Adding a Mirror to a ZFS Storage Pool The following command adds two mirrored disks to the pool tank, assuming the pool is already made up of two-way mirrors. I have a similar problem with at 2 disk striped pool ( POOL-1) of 2x1TB disk. Aug 9, 2021 #3 dakotta said: RAID-Z2 was created as one vdev with 6 devices RAID10 was created with 3 vdevs á 2 mirrored devices Everything on default. Argentum. Again, you get the added bonus of checksumming to prevent silent data corruption. Keep in mind that you have to set the small block size before you fill the pool. Traditional RAID-1 mirrors usually only support two drive mirrors, but ZFS allows for more drives per mirror to increase redundancy and fault tolerance. Is it really not possible to have a vdev mirror another vdev without regard to the individual vdevs internal build up? garm Wizard. I have a pair of 128gb SSDs sitting around, since the usage of the special device is so low I'm wondering if it's possible to swap the smaller drives in and reclaim the 256s for other purposes. All disks in a mirrored vdev have to All the examples I run into with RAID10 on FreeNAS 11 involve four disks being converted to two mirrored vdev pools which are then striped. 36T 911G 26% 87% mirror (disk5+6) 7. An all-mirrors pool is easier to extend and, with recent zfs versions, even to shrink (ie: vdev removal is supported). You can mix/match vdedvs btw. In my situation, I only have two disks which I want to mirror and stripe. We'll use 14x 18TB drives in two 7-wide RAIDZ2 (7wZ2) vdevs. gpw928. 33T 942G 25% 87% mirror (disk3+4) 7. Of course, none of the existing data will actually be striped unless you copy and write it to the pool. = 6Tb. Your help will be appreciated, it will influence what I end up buying. Instead of inscrising the ZFS pool's capacity by striping this new vdev to the existing one, is it possible, using the Web GUI, to What you probably want is 4x2 mirrors striped. Can lose 1 drive in each mirror. Once my pool gets to 85% (could take 2-3 years) what would be best. One data pool <- one vdev <- one disk. zpool create pool mirror sda sdb sdc sdd Reply reply Vdevs are always striped together, ZFS does not support any other transformation or method of combining vdevs like you're describing. Option 1 – add two more drives and create another - 2 VDEV, 6 disk each in Z2: Reasoning: more space, more speed. With that config, I went with a RAIDZ-1 and set up the disks as a separate vdevs and striped across the two arrays. Reply reply I went from a 6 drive dual raidz1 intention to a 6 drive triple mirror vdev config. How do I create a vdev instead of a pool? Edit: BTW, the drives aren't quite the same size, but when I manually create the zpool in shell it fails mounting. There are other considerations but my rule of thumb is using RAIDZ up to about 4 TB drive size, then striped mirrors above that (for resilvering time considerations). 99% reliability per pool per year (assuming 44-vdev mirrored zpools) But that means in one out of 10,000 pools per year, you're going to lose the whole pool due to a double-disk failure. 00T 17% 58% mirror (disk1+2) 7. Hi All, Just a quick one. Current setup. 💾 I have x2 4 TB hard drives in a mirror, which is 54% full. 25T 6. Then you could lose one of the raidz2's, and the other half of the mirror is still up. I want create 2 vdevs each containing 3 disks and put them in stripe. Note that the capacity of the systems is different: The mirroring system has a capacity of 2 disks, the RAID-Z a capacity of 3 disks. Thread starter AamirA; Start date Sep 5, 2023; A. Drive loss ability = 2 (but only one from each vdev) B) One vdev, 4x 3Tb drives in RAID Z2. The RAIDz1 should be more than done writing 512 KiB. 2) Two mirrors, stripe both mirrors onto one pool. jbod - Creates a simple pool of striped disks with no redundancy. Repeat this three more times until you add all ten drives. With 4 vdevs I'm thinking I should get write performance in the region of 4 drive striped storage. It is 2 vdevs striped with each vdev consisting of 2 mirrored drives. Is there a way to determine which 2 drives make up the 6TB pool and which 2 drives are the mirror(s). Hi. . (Didn't know that was even possible). 4 xSamsung 850 EVO Basic (500GB, 2. With a bunch of smaller ones it’s just a handful. vn | Share make us stronger Knowledge is Sharing Viettechgroup- Sharing Make Us Stronger-Kiến thức CNTT là sự chia sẻ- NVP-Chia sẻ làm chúng ta mạnh hơn-Viettechgroup. ada is in its own vdev and ada9 & ada1 are mirrored. Each vdev consists of a single For some reason I was expecting to set up a 2-disk striped vdev, then setup a second striped vdev and then tell TrueNAS to mirror the first to the second. Result: two pools. In order to establish a stripped mirror, you have to start with a mirrored pair and add a second set as another vdev. If you want a mirror, I’m guessing it’s the Add vdev option. Toshiba Enterprise; Hard disk controllers: Mainboard SATA ports should be sufficient in terms of number These whole disks are found in the /dev/dsk directory and are labelled appropriately by ZFS to contain a single, large slice. And yet there is still lot of threads here to be found, from 2015, with discussions about Given that any VDEV in a ZFS pool is striped to the others, a “striped mirror pool” is a redundant, albeit effettive, way of saying it. I am going to setup a stripe of mirror vdevs - so logically it would be: data. I'm of the opinion that striped mirrors and RAIDZ2 are the only vdev topologies any average home user should use. By continuing to browse our site, you are agreeing to our use of cookies. How is I don't know/understand what a "stripe data vdev" is and why this drive or these files are this way. Use normal mirror for music streaming. Recently I picked up 4 more 16TB drives, and I want to add these to this zfs pool. The most common RAIDZ2 pool seen around here uses 6-drive-wide vdevs in that case, you get substantially more capacity going RAIDZ2 versus striped mirrors. RAIDZ2 I was 90% sure with the striped mirror setup with 4x16TB and enough storage space for the coming years (at 14TB right now) as it increases speed, acceptable capacity efficiency and possibility to extend (additional mirror set) - but with energy prices going up and 18TB HDDs as the sweetspot, I This amazing document, created by iXsystems in February 2022 as a “White Paper”, cleanly explains how to qualify pool performance touching briefly on how ZFS stores data and presents the advantages, performance OK, first, a little refresher on terminology. Joined May 10, 2016 Messages 179. 8T 9. vdev1 (stripe) —> 18TB —> 18TB mirror; vdev2 (stripe) —> 18TB —> 18TB mirror; nvme_vdev —> metadata + slog/cache (possibly take the 1TB and split into partitions to get two separate vdev’s out of a single physical nvme device) Thanks in advance Generally speaking, performance scales with vdev count, not with individual drive count. vdev1 2x3TB vdev2 2x3TB vdev3 2x3TB I've managed to scavenge another 2x3TB drives and was just planning to extend with another mirrored vdev. This sever is turned on once a week to run a backup. IT Share NVP -ViettechgroupVN-Phuong Nguyen blog Viettechgroup. 5") - - VMs/Jails; 1 xASUS Z10PA-D8 (LGA 2011-v3, Intel C612 PCH, ATX) - - Dual socket MoBo; 2 xWD Green 3D NAND (120GB, 2. The closest would be to set up a new pool on the 10TB, then use graid/geom or whatever to make a stripe device. mirror - Each drive in the vdev will be mirrored to another drive in the same vdev. Resilvers/rebuilds are contained to the vdev in which the failure actually occurred. And if you have proper backups it's not worth losing sleep over. AamirA Dabbler. striped mirror vs. No need of striped mirror. 2 Optane) and plan to use those for my databases/apps in a similar striped/mirrored VDEV Personally I recommend to go with Striped RAIDZ, i. This way I of hdd platters / arial density / disk cache / sata or sas / “disk” port clock / hdd shingled or not / ssd vs hdd / mirror or raidz / stripe width 6 drives striped offers great performance. ) [Edited for clarity. You need 1 extra disk (other than any replacements) to mirror ada10 Click to expand TrueNAS-SCALE-23. Similar to RAID10. vn Viettechgroup. Vdevs can then be striped together to build up a mirrored pool. 2U2 I want to remove the second drive as a mirror and instead stripe both drives to be able to access 4tb. It reduced the fault tolerance and eliminates the problems with the striped vdevs. I recently got my hands on a P4801x and wanted to use that as a SLOG on the mentioned pool, however I am not sure it is actually possible. VDev with 2x 2TB HDD - Mirrored - for important data; DataPool 2. However, it is useful as a member of a mirrored vdev, and maybe even RAIDZ vdevs. RAID10 doesn't apply in a ZFS context, but yes, you created your pool as a 2-way stripe of 2-way mirrors. $72. And I'll I would like to create a mirror pool with a first 16TB stripe vdev and a second mirror of the first one, also 16TB. A mirror vdev can survive any failure, so long as at least one device in the vdev remains healthy. a drive /dev/da7 had been detached from the mirror) and it's this drive that I am having trouble using to go forward (i. With that in mind I'm considering 4 striped 3 drive RAIDZ-1 vdevs. Can anyone tell me how to set this up in the GUI? Do I have to create a striped vdev first and then expand with a mirror? THX! K. I think the expand option will end up striping your pool and double your storage space, which is most likely not what you want as you will end up with a pool with no redundancy. They provide much higher performance than raidz vdevs and faster resilver. An all-mirrors pool is easier to extend and, There are three basic vdev configurations: striping, mirroring, and RAIDZ (which itself has three different varieties). 1 Supermicro X10SRi-F, Xeon 2640v4, 128 Gb ECC RAM, Seasonic Focus PX-750 in Fractal Design R5 Data pool: 6*4Tb striped mirror + 1 hot spare This amazing document, created by iXsystems in February 2022 as a "White Paper", cleanly explains how to qualify pool performance touching briefly on how ZFS stores data and presents the advantages, performance and disadvantages of each pool layout (striped vdev, mirrored vdev, raidz vdev). Faster writes than RAID5, fast reads comparable to RAID0. RAIDZ2 Pool The mirror has been "split" (i. zpool create poolname /dev/sdb /dev/sdc zpool add poolname /dev/sdd /dev/sde Bonus Create ZFS file system zfs create poolname/fsname Set mount point for the ZFS pool. Well, you can, but it would end up being a mirror with 5 drives of identical data for with only 2 drives of 10 worth of storage space. I would like to replace 1 The second VDEV is “mirror-1” which is managing /dev/sdg and /dev/sdh. This can consist of a single disk, a set of mirrored disks (mirror vdev), or a striped array of disks with one, two, or three disks' worth of parity (raidz1, raidz2, raidz3). Otherwise, as new data could only be striped to the 2 new vdev's, read performance would be just 2/6 the potential performance. Dec 15 I'll compare 4 disks to 4 disks (striped mirror versus 3+1 parity). Adding VDEV Examples To make a striped mirror, add the same number of drives to extend a ZFS mirror. Create Striped Mirrored Vdev or RAID10 ZFS pool zpool create poolname mirror /dev/sdb /dev/sdc mirror /dev/sdd /dev/sde. 10. How To Create Striped Mirrored Vdev Zpool Edit: anyway. Edit: It is not 1 vdev per disk. Joined Jan 1, 2016 Messages 9,703. For example, you start with ten available drives. Any clue what is wrong with it? Craig Engbrecht; We are going to create a striped vdev, like RAID-0, in which data is striped dynamically across the two “disks”. In theory, ZFS recommends the number of disks in each vdev is no more than 8 to 9 I currently have my Proxmox boot drive as a pair of 980 Pro 1tbs in RAID1 ZFS. vn| ITShareNVP Channel | Phương Nguyễn | Phuong Nguyen Blog| Lưu Aiming to mostly replicate the build from @Stux (with some mods, hopefully around about as good as that link). I would like to start adding more hard drives to have back up, does this stripe data need to be striped for this? Thanks for any help. I am planning for the future so have time to consider and take advice. Yeah, it’s just a tad different from a single drive striped to a mirror VDEV. or. 16KB will be around 80GB for my 50% filled 4x16TB striped mirror pool. a 2 x SSD mirror VDEV (250 GB Crucial/Micron -- CT250MX500SSD1) a 1 x spindle disk VDEV (250 GB WD Velociraptor Unfortunately I don't have the resources to provide benchmarks for striped mirrors, or mirror'd stripes, where we know the performance is to be had. It mirror mirrored vdevs striped raid raid 1 raid 10 zfs Replies: 6; Forum 1 Mirrored Vdev 1 Mirrored Vdev 1 Mirrored Vdev 1 Mirrored Vdev With the OS installed across all of them, After an apt-get dist-upgrade, the system boots to a grub recovery screen. " Increasing I'm at a point where I will need to add storage to one of my zpools soon and I'm wanting to go from my standard 2-disk mirror to a 4-disk striped mirror. Hardware: 6x WD RED Pro 4TB (WD4003FFBX) Broadcom 9207-8i SAS2308 i5-6500 A) Two vdevs, each with two 3Tb drives mirrored, then stripe the 2 mirrors. 00 You cannot shrink a vdev. Want to make a mirror vdev. I also have a mishmash of drives per vdev and it's a lot less capacity loss when you have a 6-6-8 vdev than 6-6-8-8-8-8-8. You can only afford to lose a vdev, if your vdev itself is mirrored. OS (TrueNAS): SATA SSD - single or mirror - is 128GB sufficient for TrueNAS? VMs: NVME boot drive (2x 1TB Samsung 970 EVO - PCIe x3. Then I would mirror both vdevs. SOLVED Change stripe vdev layout to mirror. Click "extend volume" and you'll almost instantly have a striped mirror. converting RAID 0 to RAID 10 in traditional RAID language), but I am wondering if I can set up a mirror (RAID 1) and then add two more drives as another mirror and stripe across both mirrors (to become RAID 10) later, both for performance and additional storage. Torn Between ZFS and BTRFS for a new general purpose storage pool, need advice. SLOG is for sync writes only, so that does not help you at all. A striped vdev is the simplest configuration. Situation: old - 2x striped VDEVs, each being a 2x8TB mirror "Raid 10", "16TB" usable new - 3x stripped VDEVs, "24TB" usable zpool list -v NAME SIZE ALLOC FREE FRAG CAP media 21. But with the combination of metadata, indirect blocks + per-dataset determined small files, this seems promising. The issue I’m facing is that the TrueNAS interface doesn’t allow me to configure this setup. I would like to move this to 4 x 980 Pro 1bs as striped mirrored Keep in mind that if you have data on one Mirrored vDev, and then add a second Mirror vDev, the existing data won't magically move. To be technically correct, when you stripe disk pairs first then mirror the pairs it's called RAID 0/1, not RAID 10, which builds mirrors first then stripes across them. When selecting to “Add vdev” under the “Pool Options”, selecting “Add Log” and adding the Optane it gives me a warning: “A stripe Hi! I've searched for this and would just like to verify the answer that I think I have found. There is no parity, mirroring, or anything else at the zpool level - the zpoolmerely distributes writes Aiming to mostly replicate the build from @Stux (with some mods, hopefully around about as good as that link). All disks in a mirrored vdev have to fail for the vdev, and thus the whole pool, to fail. I guess you will use SSD. Is there a way to correct it? I just want a simple media server, so nothing extreme as of now. Can i add another hdd of same size, and convert the 1 that is stripe to mirror with the new hdd of same size? PhilipS Contributor. Because VDEVs are always dynamically striped, “mirror-0” and “mirror Use the 2 removed drives with the other 2 new drives to create the new striped mirrors pool in the main system, using one of each in each mirror VDEV. e raid0, any issues with one drive will affect a 2 x SSD mirror VDEV (250 GB Crucial/Micron -- CT250MX500SSD1) a 1 x spindle disk VDEV (250 GB WD Velociraptor Unfortunately I don't have the resources to provide benchmarks for striped I don’t have time to try this out yet, but I don’t think you want to expand. Last edited: Dec 16, 2020. Joined Sep 5, 2023 Messages 12. sretalla Powered by Neutrality. (Alternatively, get a third SSD and make a 3-way mirror as special vdev for the raidz2 pool. single disks (think RAID0) 2. Each VDEV consists of 2 3TB drives that are mirrored. As mentioned, pre-allocated files can be used fer setting up zpools In a mirror vdev, ZFS is able to read different blocks of data from both disks concurrently; In a multi-vdev pool, ZFS will automatically stripe your data, so it can - again - read from multiple vdevs concurrently; Western Digital claims that a 3 TB Red drive can read at more than 140 MB/s. 5") - - VMs/Jails; 1 xASUS Z10PA-D8 (LGA 2011-v3, Intel C612 You can't do that with ZFS. (The best performing RAID level for small random reads) Dry run (Test the command) We can actually test the command before we commit any real changes . , we try to make multiple RAIDZ vdev, and each vdev has no more than 5 disks. Once we understand RAIDZ, understanding mirrored and striped vdevs will be simple. g. Also, your resilience will be determined by the weakest vdev, which is again the Z1 vdev. CMR, Helium, 512e, e. Roughly speaking, your pool performance will be determined by your slowest vdev, in your example this would be the Z1 vdev. redundant vdevs (aka mirrors – think RAID1) 3. For 10+ drives (in a single VDEV), I would go with Z3. This doesn’t make much sense with today’s hardware. 640 KiB . - so I agree with you. m trying to add the /sdc disk to be mirrored with the /sdb disk in the "fast" pool admin@truenas[~]$ sudo ls -l Reading Time: 3 minutesTable of contents Features of ZFS ZFS Storage pool STRIPED VDEV MIRRORED VDEV RAIDZ VDEV Putting VDEVs together References ZFS [] Skip to content. 5") - - Boot drives (maybe mess around trying out the thread to put swap I've googled a bit and everything I find seems to be about adding mirrors to existing stripes (i. Thanks in advance. 04 LTS I could do three two-way mirrored vdevs in one pool for a total size of 3tb, but as I understand it, that would be striping the three mirrors together, which is exactly what is being RAID gives you protection from disk failure, the mirror gives you protection from vdev failure. This is for a final home backup server. For 4 drives, I got with striped mirrors. If all the I currently have a ZFS pool that consists of 1 vdev with 4 16TB drives in a raid-Z1 setup. I would go either option 1 or 3, depending on what I wanted to achieve. OTOH, if you were to add a larger drive to an existing mirror using zpool attach, ZFS would not be able to utilize that extra space, since it writes the same blocks to each disk in a mirror. -Lose the second disk and your pool dies. I find it interesting that with Hello, I currently run TrueNAS Scale (since many month with this pool design (see also my old thread) Asrock Rack X470DU with 2700X and 4x16GB RAM ECC 4x 16TB Toshiba as striped mirror 2x Micron 7300 Pro 960GB mirrored as special vDev (metadata) no L2ARC no SLOG With "sudo zpool list -v" I Help me finetune my understanding of 'metadata vdev' in ZFS and disaster recovery of a stripe mirror vdev. I suppose I Hey there I am running a TrueNAS with one pool that consist of 3 mirrored vdev striped together. 30-Drive Storinator Cache That leaves a nice striped mirror NVMe pool (2*4 TB + 2*2 TB) for everything fast. As I near full usage of the capacity in this pool, I decide to add 2 more mirrored vdevs (same drive capacity, speed). If you want higher storage efficiency (more storage for the same number of drives), you want wider vdevs, preferably optimal width (eg, the number of drives in each vdev is a power of two after deducting parity Greetings. e. This website uses cookies to ensure you get the best user experience. Striped Mirrored Vdev’s (RAID10) This is very similar to RAID10. Then you can “extend” the second disk with the now removed first disk. I have/had four sets of mirrored disks in the setup (8x4TB drives). I'm pretty sure a 3 disk RAIDZ-1 vdev is still decently robust? Another question for vDev Design: Mirror vs. For my new build, I have 6 x 118GB Intel P1600x (M. The good news is that you can remove the metatdata vdevs as the main pool is mirrors. I would like to move this to 4 x 980 Pro 1bs as striped mirrored That pool has a RAIDZ1, a mirror, and a single-device stripe VDEV; and because of the presence of the Z1, neither of the latter two VDEVs can be removed, so pool redundancy is now reduced to "if sdg fails, so does the pool. So, for 6*8T drives, Lets look at the pros/cons of Using multiple mirror vdevs is not an issue for zfs - at all. Compression is disabled by default. Sorry I missed that. With the first option, you can lose one disk from a mirror without losing data. That’s not how ZFS works. That leaves a nice striped mirror NVMe pool (2*4 TB + 2*2 TB) for everything fast. I have a pool of striped+mirrored hard drives, plus two mirrored SSDs as the "special" vdev they're 256gb SSDs but the special vdev is only using ~11gb according to zpool iostat -v. This should be a lot easier. Convex Mirror. I would create 3 striped 2 way mirrors and add a special vdev mirror. With larger disks imho using striped mirror is a must for this simple reason alone. A zpool is a collection of one or more vdevs. I have a 8 disc array of striped mirrors and I'm super happy with it. -If ALL VDEVs in a pool are mirrors (not RAIDZ or DRAID) and are the same ASHIFT, then the (mirrored) vdevs can be removed. raidz has better space efficiency and, in its raidz2 and raidz3 versions, better a 2 x SSD mirror VDEV (250 GB Crucial/Micron -- CT250MX500SSD1) a 1 x spindle disk VDEV (250 GB WD Velociraptor -- WDC WD2500HHTZ-04N21V0) a 2 x spindle mirror VDEV (250 GB WD As long as 1 vdev is striped and not mirrored, that's true. If you have 4 drives setup as mirrored striped pairs in multiple VDEVs and a read request comes in, so it might only exist on one VDEV, or one mirrored pair. Jun 25, 2024 RAID-Zx resilver performance deteriorates as the number of drives in a VDEV increases. For 5-10 drives (in a single VDEV), I go with Z2. Hi, I have 6x 3TB disks. That gives me 64tb of usable space over 48tb with mirrored vdevs. Another option would be "create a raidz3 on top of mirrors". And at worst you can lose 2. 19T 0% 0% Problems: My pool usage is very This content follows the TrueNAS CORE 13. 8T 12. I've done this with a single disk vdev recently - Striped mirrors will survive the loss of 1 drive per vdev so you can lose 2 drives, but ONLY if one drive is in each vdev. parity vdev A stripped mirrored Vdev Zpool is the same as RAID10 but with an additional feature for preventing data loss. Soz adding another vdev is the answer. 3) One RaidZ2 with four disks. Total Cap. The difference in the setup is the order that you stripe and mirror. The second VDEV is “mirror-1” which is managing /dev/sdg and /dev/sdh. raid40000 said: I prefer Glacier indeed, I use it at the moment. -Can lose one disk and still detect, but not correct errors. To create a mirrored pool, we run: In a mirror vdev, ZFS is able to read different blocks of data from both disks concurrently; In a multi-vdev pool, ZFS will automatically stripe your data, so it can - again - read from multiple vdevs concurrently; Western Digital claims that a 3 TB Red drive can read at more than 140 MB/s. As always, any kind of VDEV can be added at any time. Use the Product and Version selectors above to view content specific to different TrueNAS software or major version. Result: one pool. A pool is a collection of vdevs. Mirror of 1TB (one pool, one vdev) Stripe of 2x14TB (one pool, one vdev) When only having a stripe, I. I agree with the suggestion of striped mirrors, perhaps 2-way with one or more hot spares. Joined Jan 22, 2012 Messages 4,472. First disk is 100 % survival rate. When the mirror disks are writing . Hello @savagecooks Working on the assumption that you aren't wanting to buy more drives, if you have less than 1TB of data stored now, you can use the UI to remove the 2TB disk from your pool, and then perform the proper "attach" command from the Pool Status page against your 1TB disk - this will convert it to a mirror, but it will be limited to 1TB of usable As far as I know, I cannot simple remove it from the zpool, so I thought the next best thing would be to make it a 2-disk mirror. Striped mirrors you can lose up to half your drives if they're not in the same vdev. 00 VALOR. com; Menu. Concerns: A. In this quick tutorial, you will learn how to create a striped mirrored Vdev Zpool (RAID 10) on Ubuntu Linux 16. I would suggest to backup and recreate the pool with 3 mirror vdevs and set the last disk as a hotspare. Creating a Mirrored Storage Pool. This is performant and lets us use most of our disk space, we are going to create a mirrored vdev , also called RAID-1, in which a complete copy of all data is stored separately on each drive. 768 KiB . iuwv kyhc vsefvo dkrsl fyrn rlqlly uqe iwuvwe yhngnu jlhv