Zfs dual mirror. In ZFS, each vdev (talking large implementations) .

Zfs dual mirror Easy to replicate the system, by moving one disk out of mirror to new platform; 3. This way, both before, during, and after the upgrade, my pool had a single mirror vdev. It's all personal preference. There are insufficient replicas for the pool to continue functioning. So it's likely that there has been just a small read. So after a reboot only NixOS can reliability access the pool as I think it runs zfs import -f on boot if root is on ZFS. Joined Sep 23, 2011 CPU: AMD Athlon 64 X2 Dual Core Processor 5000+ RAM: DDR3 8GB HDD: WD Green 5xWD20EARS+1xWD20EADS 2TB's (RAIDz2) M. 2 drive ZFS stripe. Which brings up one potential risk. What you absolutely need to take into consideration is how ZFS caches though. 6TB Mirror TrueNAS-12. Install Ubuntu Desktop using ZFS, then add a second drive once it's up. If you want to check start with zpool status and smartctl -a /dev/sdb; smartctl -a /dev/sdc and ask about any questionable results. 0. If I understand what I have read, that will give me 8 TB of space and self-healing if there is any date corruption. scan_idle - Número de milissegundos desde a última operação antes do pool ser considerado ocioso. I agree, for dual booting between ZFS and not-ZFS distros. Joined Sep 23, 2011 Do not use these instructions for dual-booting. I'm running an entirely ZFS-based install of FreeBSD 8. If you create a new zpool mirror using both SSDs the total pool capacity will automatically be that of the smallest one. If a file is corrupted on the phone before it gets to ZFS -- then ZFS can't do anything. This gives your host some redundancy. A virtual device that stores identical copies of data on two or more disks. The latest Seagate Exos doesn’t have dual actuator. When I put 2 drives in a pool, each on its own vdev, I actually get better read performance compared to 4 drives in a pool in the form of two mirror vdevs! This totally goes ZFS mirror ubuntu boot drive Raw. 0-RC1, and I'm noticing strange sequential read performance behavior. jpg. Run camcontrol devlist to find the new "ada" number for your new drive. single disks (think RAID0) 2. Minimum practical raidz2 on 4 disks can tolerate 50% failure. Backup your data. you'll likely sacrifice some performance but it sounds like that's a tradeoff you're willing to make. I’m seeing some pretty odd issues with write speeds. If any disk in a mirror fails, any other disk in that mirror can provide the same data. For example, this is what you get in a zfs mirror install with EFI and BIOS booting capabilities: gpart show => 40 Degrade the mirror pool by removing one from each vdev, create a new pool of single vdevs with the new ashift, zfs send/recv, then once you're satisfied, wipe/join the other drives in each vdev to the new pool. I'm putting together a small ZFS file server using 9. Can ZFS mirror an entire hard drive in OpenSolaris? 2. I'm upgrading my simple single-disk file server to a proper NAS with multiple, mirrored disks, and want to start using ZFS on them. Hello all I’ve been trying to move to a more declarative way of handling my computers. Thanks! In order to reduce my drive count, I am replacing my current Zpool made up of 4x 1TB and 4x 3TB spindles (4 striped mirrors) with pair of new 14 TB disks in a simple mirror (snapshot replication is amazing, in progress now) I have a ZIL and Cache drive on my existing pool, is it worth re-purposing those SSD's onto this new simple 2 disk mirror? I've been running a straightforward ZFS mirror on Ubuntu for a couple years. sh These instructions are not suitable for dual-boot # - No hardware or software RAID is to be used, these would keep ZFS from detecting disk errors and correcting them. Thanks Derrick. that would give you (theoretically) double mirror vdev in zfs basically always has any data on both drives (it’s automatic), but e. There is no need for manually compile ZFS modules - all packages are included. 0 FireCudas). Unless you're running a production server, I wouldn't overthink it. I have a dual boot system running FreeBSD-13. It I want to build a ZFS pool using these drives. 04 supports a single ZFS boot drive out of the box. 3xJBOD 56xHDD á 4TB). Any existing data will be lost. I also keep a 1 drive spare in the pool. Just create it as a single disk pool. Thread starter mouchon; Start date Sep 23, 2011; Status Not open for further replies. So far so good, no incrementing errors in SMART, and no errors detected by ZFS. a consumer-grade enclosure is probably not going to be built with the assumption of continuous 24/7 usage. if you delete a file accidentally, it’s gone from both disks; it is totally worth it (mirroring drives), because when one fails (and it will!), your data is still there, whereas if you didn’t have the mirror, a drive failure means you’re not backed up until you get another drive and re-copy your 2. Using 14TB 2X14 dual actuator drives, along with the setup described by @John-S of using LVM to create a striped volume per drive, I’ve gotten some great performance in a raidz2 pool. While I was slightly disappointed by the fact the second slot could only handle 2230 M. I used to run dual geom UFS mirror on it. GitHub Mirror; Code Review (Phabricator) Wiki; Continuous Integration Service; Normally, the installer takes the whole disk. It's possible to go from mirror to z1 down the track without needing separate back up disks. Mirror on 4 disks can tolerate 75% failure. 0x16 slot That's not a mirror, that's just a zfs pool with multiple devices. Then i prefere tripple mirror. CORRECTION: I share only a directory and on 2 NVMEs you could make a ZFS mirror and install a Linux distribution there. parity vdevs (aka stripes – think RAID5/RAID6/RAID7, aka single, dual, and triple parity stripes) The pool itself wil Multiple mirrors can be specified by repeating the mirror keyword on the command line. Skip to Content; Skip to Search; Home; Cloud Applications ZFS Performance. freebsd. While waiting for read request 1 to complete on disk A, zfs would send read request 2 to disk B. What could be the solution? The dracut initramfs command was slightly modified to boot from partition 1 containing two subdirectories efi/gentoo/ ZFS Mirror - very low performance. If I have 2 mirrored pairs in a single pool, as in: "zpool create tank mirror disk1 disk2 mirror disk3 disk4", do the 2 pairs form a RAID 0-like configuration? I don't want to have the RAID0 between the pairs, so if disk1 and 2 both fail I still have half my data. . I have created a ZFS pool using FreeBSD and access this pool from FreeBSD and Debian. ZFS provides data redundancy, as well as self-healing properties, in mirrored and RAID-Z Many disks can be used in a mirrored configuration. My FreeBSD 12. therefore, i created a striped drive with the smaller and followed these instructions. Is RAIDZ1 going to somehow tank performance as opposed to mirroring or is ZFS fast enough to saturate the disks in either config? You shouldn't expect to get the maximum rated speed out of those NVMe disks with ZFS either way. My homelab runs proxmox and I set it up originally with a single host drive. Can I just install two large drives, one at a time, waiting for each one to . img # verify mirror pool is degraded zpool status -v # later, once In ZFS I seem to only find cases where you can stripe mirrors, so I think it would actually be more like: Mirror 1: 1-1, 2-1 Mirror 2: 1-2, 2-2 Mirror 3: 3-1, 4-1 Mirror 4: 3-2, 4-2 So say if I lost drive 1, mirrors 1 and 2 would be affected. I have an IBM x346 with dual 3. One reason why I was excited about Framework 16 was to get two NVMe slots. Then add a third drive to ZFS mirror pool, wait for sync and then remove the third drives and use it as an offsite backup. Conceptually, a basic mirrored configuration would look similar to the following: mirror ZFS itself will be fine with it. Conversely, if you mirror your pools, your data is stored twice in a dual mirror, and thrice in a three-way mirror; but, any disk can answer the read request right-away. 04 Root on ZFS for Raspberry Pi. The document doesn’t I've got mSATA for my drives, too, but I got one of those dual SATA 3. (Multiple disks to write, Also according to the article, mirror vdev pool is less strain on the disk overall when rebuilding. But now I’m stuck. Debian root is on an EXT4 file system. Hi, I want to know if is possible this scenario: Use ZFS on a system with two drives configured as ZFS soft RAID1 (mirror). Install PVE with Raid1 ZFS across the 2x drives for mirrored redundancy. I'm an r/DataHoarder, so I use 12x raidz2 vdevs. I have 2x 2TB Proxmox Boot Disk - from single disk ZFS to mirror help . I went from a 6 drive dual raidz1 intention to a 6 drive triple mirror vdev config. Freenas install with 16GB swapfile, no swap on disks) Extra: 2x 5 inch 6x 2. luckylinux. I recently decided to upgrade my network attached storage zfs umount -a zfs snapshot -r M31@cp2 zfs rollback M32@cp1 zfs send -R-I M31@cp1 M31@cp2 I have a few drives from my NAS using ZFS but I'm thinking that maybe it doesn't make sense to incur network latency and have an additional machine running just to access my files (realistically, I only need the files while I'm on my computer). Joined Apr 16, 2020 Messages 2,947. So i'd say unless you are planning for dual failure If your trying to so something like a dual-boot. If you want to setup a mirror or raidz topology, use LUKS encryption, and/or install a server (no desktop GUI), use this HOWTO. And by backup mirror I mean make a local mirror pool big enough to hold the backup(s) and pull backups to it (zfs send/receive ideally). Another benefit to ZFS in mirror mode is zpool split for backups (though I'm a zfs send kind of person myself). 2TB Except for maybe another pool. the same, with compression=lz4. 2 due to slots) SSD drive and do the mirror. Without purchasing additional drives, your choice is to go for increased redundancy (single RAIDz2 vdev, what you have now) or greatly increased performance (pool of two 2-wide mirror vdevs) at the cost of slightly lower redundancy (two single-redundant vdevs, rather than one dual-redundant vdev). I've actually done something like that with a 3TB and an 8TB drive. I got some 3TB drives for free, and swapped out my 2TB drives for these 3TB models at the time by using zpool replace. ZFSBootMenu can manage multiple distros if they all have ZFS support in their initrd image. Managing ZFS File Systems in Oracle Solaris 11. Mirror ZFS pools on dual (or more) SSDs, giving redundancy, fault tolerance, and high-performance striped reading. M. A send to the same pool is the same as a send to a different pool, just need to make sure you use the right options to carry all the properties and snapshots over. I currently already have 1 8TB disk with all my data on it, and ordered an additional 8TB disk of a different manufacturer (and much newer model, too). I have two ZFS pools; two 4 TB disks in a mirror, and a separate 8 TB disk with no redundancy. Haven't replaced a drive in ZFS yet, but from what I read you MIGHT have to run zpool offline pfSense /dev/gptid/4817702822099101379 but it says to do that before removing the physical drive. But if you do go w/ a pool of mirrors, you can use Rebalancing data on ZFS mirrors to rebalance it! Really neat, you basically detach half your mirror, make a new pool from it, send all your data Steps to mirror a single ZFS disk and make it bootable . # create sparse file, as placeholder for 2nd disk truncate -s 1GB /tmp/placeholder. Drives are Samsung SSD 883 DCT 960GB sudo fdisk -l /dev/sd* Disk /dev/sda: 894. It also really helps to move from gzip6 compression to I am currently on 22. Chris Moore Hall of Famer. 88. During those cases where the pool had a failure, the dual mirror pool is at extreme risk during the resilver, while the raidz2 pool can sustain an additional failure and/or gracefully handle additional bad blocks or other silent That long 48177 number I think is the gptid. I currently have 2x4TB drives and 2x2TB and not sure what's the best approach to pooling them. img # create the new mirror pool zpool create mypool mirror /dev/sdX /tmp/placeholder. ZFS mirror itself is faster than RAIDZ. An all-mirrors pool is easier to extend and, Using multiple mirrored (2-, 3- or N-way) vdevs gives you the combined iops performance of all vdevs and especially for reads the fastest drive of each mirror dictates the To create a mirrored pool, use the mirror keyword. Dual RAID 0: A hardware RAID controller configured for two RAID 0s. This is the first time I’m attempting proxmox w/ZFS as my boot drive, so I am sure mistakes were made. If all you want is an unencrypted mirror, and you don't need raidz or encryption, then here's a semi-custom method that's a little less work. Hello! I am building an all-in-one box as part of a new media server setup. I’ve been trying to get mirrored boot working, but it keeps failing. mouchon Cadet. You can say the same thing about ZFS in RAIDZ1/2/3 configuration and for max performance, you want a mirror and then eventually stipes of mirrored drives. txg. But that does not increase storage, just redundancy. 18. Essentially, you will be installing FreeBSD with root-on-ZFS on the remaining free space of the disk, instead of using the I don't have my dual-disk test system any longer, Ubuntu Desktop 20. Using multiple mirror vdevs is not an issue for zfs - at all. I believe there was a good post in the how-to section. The ESP32 series employs either a Tensilica Xtensa LX6, Mirrored ZFS on Ubuntu 23. It is also more convenient to use. In these tests we used ZFS in one of the following configurations: Single RAID 1: A hardware RAID controller configured for RAID 1, presenting a single volume to the OS, with ZFS only seeing it as a single disk. I figure it’s pretty cheap insurance to throw a second boot drive in there, but I am not really sure how one would go about switching this in the most effective way. I'll have to look into that. The only nagging question about mirror'd vdev is that technically, in a failure, say you lost your mirror drive. As you increase disk count, failure tolerance in raidz decreases, while failure tolerance increases in If a single disk is enough for your backups, why bother with mirroring the disk you’re sending off site. I'm not doing anything other than stock setup / tuneables. img # immediately place sparse file offline, so zfs won't write to it zpool offline mypool /tmp/placeholder. And for my media playback needs, one vdev is plenty. It A Mirror vDev in ZFS is more or less immutable / un-changable sizewize. timeout - Número máximo de segundos entre os grupos de transações. 5") - - VMs/Jails; 1 xASUS Z10PA-D8 (LGA 2011-v3, Intel C612 PCH, ATX) - - Dual socket MoBo; 2 xWD Green 3D NAND (120GB, 2. I would reinstall proxmox on the two ssds in a zfs mirror. The following command creates a pool system1 with two top-level virtual devices. ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. You might just create a fast mirror with those nvmes instead as others already suggested. Result: two pools. As a ZFS user and fanboy the temptation of a dual raid6 setup is tempting. 4; Creating and Destroying Oracle Solaris ZFS Storage Pools; Creating a Mirrored Storage Pool. 11-1 Single vdev mirror of 2 x HP EX920 1TiB NVMe SSDs Pool is ashift=12 compression=lz4 else defaults I also installed openzfs on Mac. 2 adapter cards, each in a dual-bifurcated PCIe3. Don’t bother. /dev/nvme1n1 is the ZFS boot and I would like to mirror /dev/nvme2n1 for protection. Thread starter ligistx; Start date Oct 19, 2023 Forums. I read a lot and tried a few things with NixOS. 2 SSD (instead of the full size 2280), having two slots makes dual boot easier to deal with. A few months ago I migrated from a single proxmox instal to a mirrored array using a supermicro pcie dual slot nvme card 9my motherboard doesn’t have native physical nvme support), and ever since, I have noticed very slow VM perofmrnace. I would expect, but have never tested, triple read throughput from a triple mirror I run proxmox on a zfs mirror for redundancy/uptime. I am looking to reimage and move over to zfs and then take advantage of dual disk mirror. Zpool remove tank disk will pull out disk from the pool, so I don't see how raidz2 is safer than a mirror, disk-for-disk. No need to worry about it. Thanks you’re actually second person to point out that mirror you can only lose one drive - sort of. Starting with Proxmox VE 3. I run dual 128GB SSDs and that seems to work well for me. As far as I can tell, none of the OS run zfs export pool at shutdown. In UEFI settings, set controller mode to AHCI, not RAID 11 votes, 13 comments. Caution This HOWTO uses a whole physical disk. Using multiple mirror vdevs is not an issue for zfs - at all. 10 2024-03-03 Linux ZFS. Reply reply 1_Pawn • not Should I use SSD for /root & /swap and HDD for /home for dual booting linux mint? ZFS Mirror Disk Degraded, How to Rebuilding. Edit: I should add that I'm running Debian and the default for both packages is to email anything notable. An all-mirrors pool is easier to extend and, with recent zfs versions, even to shrink (ie: vdev removal is supported). Scrubs are faster than my old 3 drive raidz1 and so it overall performance. g. Just recently start my zfs journey. I had problems creating a zfs mirror with Freebsd installer, it would not allow 2 nvme drives to form a mirror even when the smaller drive (500GB) was listed first and the 512GB second. Making a partition for Pop-os. STATE READ WRITE CKSUM rpool ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 ata-CT2000MX500SSD1_2037E4AFA292-part3 ONLINE 0 0 0 ata-CT2000MX500SSD1_2037E4AFB082-part3 ONLINE 0 0 0 errors: I'm been thinking about ZFS and its self-healing capabilities and wonder if I can use it to mirror my backup across all 3 drives. Do not use these instructions for dual-booting. Quando o pool estiver ocioso, a taxa limite para scrub e resilver fica desativada. raidz has better space efficiency and, in its raidz2 and raidz3 versions, better resiliency. Purchase new 1TB drive, attach to form 3-way mirror. you could also go eight (or 9 with a warm spare, or 12 with 3-way mirrors) 2TB drives, same idea except you're striping across 4 vdevs rather than 2. Addting L2ARC and SLOG to the ZFS pool improves the speed significantly, giving a feeling that the whole pool is SSD; 4. The mirror will concern only one partition on both disks. The pool won't expand to fill the 2TB drive's extra space unless and until all drives in the vdev are 2TB. So Im building a home server and decided to dive into zfs for first time, while waiting for another 2 drives to arrive I created a simple 2 drive mirror. I had everything up and working today, but I wanted to see how removing a drive from a ZFS mirror would fare, and ever since I offlined (ada1) of (ada0 & ada1), Chelsio S320e Dual-Port 10GBe CPU VM Support: Full Memory: 256GiB Chassis: Chenbro 40700 4U-48 bay / SAS-2 Backplane But WRITING, you have to write the whole thing on each of the mirror disks. I'm getting 400 MB/s of sequential writes and I'm happy with the general performance of this array. Happy to receive clarification here regardless. a single read request is sharded across two disks or two simultaneous requests are each served simultaneously from different disks). Yes, I know dd is not the best benchmark, but it's easy and I can get similar results with fio as well. Thanks! Once I get a second disk (we'll call it sdg), how would I add it to make it a mirror with sdf? And yeah, I've heard it's better to use uuid. In other words, yeah, a dual 4+2 RAIDZ2 pool is going to have marginally better performance than a 9+3 RAIDZ3 pool. Disconnect one of the two mirror disks. also using zfs 0. On a ZFS Raid1 you get read performance that is usually superior to a hardware Raid, also with RaidZ you can get superior performance to Hardware Raid5 Just take a look at Anadtech. it's possible you'll expose issues with the USB-to-SATA enclosure you're using (or the USB controller, or the cable if it's low quality, etc). The ZFS root pool for FreeBSD is a different pool. 4, the native Linux kernel port of the ZFS file system is introduced as optional file system and also as an additional selection for the root file system. 5") - - Boot drives (maybe mess around trying out the thread to put swap I have a small system with two drives running Solaris 11 with a ZFS mirrored root pool. When 2 finished, 1 would still be running so zfs would send request 3 to disk B. If I create a single disk zfs pool zpool create -o ashift=12 -f <pool> <disk_1> I now have a EDIT: Seems I have been ill informed and that turning a stripe into a mirror is indeed possible, but seemingly only for single disk vdevs. Multiple swap partitions, one per drive, not mirrored, for Intel Pentium G2030 3. zfs. This pool started out as two 2TB drives in a mirror. 💾 I have x2 4 TB hard drives in a mirror, which is 54% full. The following command creates a pool with two, two-way mirrors: # zpool create tank mirror c1d0 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. Also you have to think about performance WHILE resilvering. 4 xSamsung 850 EVO Basic (500GB, 2. It could be an aditional argument to go to tripple mirror. ZFS on linux mirror, different size disks, partition or whole disk? If I have 2 SSDs in my pool, one is the primary and the second one is the mirror, must the size be exactly the same? When I use two different brands It should be yes, but I made the mistake of replacing a very old SSD with a newer one in a ZFS mirror. You could actually expand it by replacing the 2 mirror disks (one at a time) and that vdev could then expand and grow the pool size. The current way you did it would only be remedied by CLI, for noobs is always best to let the installer do it. If it doesn't and you have another copy (copies=>1) or a mirror or parity, it will be able to fix the corruption. org as it needs. Now, it's possible that Napp-It has created some hybrid filesystem that is ZFS with all those features stripped out. You should I'm not saying anything is wrong with dual boot, however, I strongly prefer virtual machines Mirror from 1TB to 2TB, leave 1TB drive attached. 5" drives and mini/midtower case guy, myself. 2 and Debian Bookworm. In UEFI settings, set controller mode to AHCI, not RAID I have tested 2-3 different pool configurations using Seagate´s Q&A. It works fine, has a total of 11TB, and scrubs its entire storage area (11TB) just like any other pool. The replace command would be this: zpool replace pfSense /dev/gptid Note: this isn't what I personally usually do specifically for ZFS; I'm more of a 3. Hello, few months ago I started with Proxmox. Then replicate snapshots to the single disk from your backup mirror. 6 ZFS on Linux v0. pjc Contributor. Use it together with the new disks up create a degraded z1 (ie one disk missing) Copy the data from the mirror to the degraded z1 Erase the remaining risk from the mirror and resilver in the z1. Would a dual PCIe NVME card be a solution? Any help would be greatly appreciated. You won’t see any benefit. I currently already have 1 8TB disk with Important notes: 1) This tutorial assumes you have the OS you want to dual-boot with already installed on your drive, and that you already have freed up some disk space. 3 server is using ZFS on root using the default settings, Moving ZFS-on-root mirror to bigger drives . And you're only going from 50 the minimum they’ll say you should use is dual parity raidz2. Test setup: i7-6700 64GiB RAM Linux 4. I installed Scrutiny to keep an eye on my drives, and despite If I were to add a single, dual actuator drive, they would both end up in the same mirror Vdev, thus not following the offset scheme to preserve some redundancy. I currently have 2x4tb Seagate IronWolf drives in a mirror, so what would be the best way to expand from this mirror besides destorying and recreating a pool, which I am willing to do if any of you have an idea of where the data could go in the meantime while creating the new pool. vfs. Both CentOS and Mac need zfs import -f pool to load the shared pool. And you should treat that as if it’s single parity They do happen of course. Which is going to hurt since ZFS with buying everything up front is VASTLY more expensive than RAID where you can grow the array as needed - under the assumption that the storage needs grow slowly, which they typically do for home users. I am planning for the future so have time to consider and take advice. 8. 10 Stable; Supermicro 24 bay chassis with sas3 backplane I'm fairly certain that you get double throughput on sequential reads on a dual mirror and single throughput on sequential writes. true. Due to hardware limits I was forced to create ZFS pool on HW RAID6. Mirror gives the resiliency to absorb one drive loss, Z1 also allows for one drive failing, but makes no sense for two drives. Vdevs can be any of the following (and more, but we’re keeping this relatively simple): 1. 00GHZ Dual-Core Processor Socket LGA1155 16GB Hynix ECC RAM 40GB Intel 320 series SSD boot disk 1No. By the way, I will be using openZFS on MacOS. Hi all, I have a single disk NVMe in a relatively new Proxmox installation. They were eBay purchases for next to nothing so they are old and reliability is questionable. Raw throughput is going to be a little better on the 9+3 RAIDZ3 pool, Do VMs on a The SSDs are 8 of Seagate ST800FM0173 12Gb/s dual port, 10 DWPD eMLC SAS, with datasheet claiming sequential 1850mb/s read, 850mb/s write, 2 drive ZFS mirror. That said, I absolutely do have ZFS-powered minisforum boxes out there, with dual drives in mirror. The key things to remember about zfs, are that it is a raid0-like(striped) pool of virtual devices (vdevs). I've been rebuilding raid arrays (and now zfs) for more than a decade, and have Hi, I have a 2 HDD mirror on my NAS that is used for seeding mostly as the title suggests and I think I made some mistakes while configuring the My plan is to buy 2x 8 TB drives, format them as ZFS, and create a mirror. Thread starter luckylinux; Start date Oct 14, 2012; L. I used to know more about ZFS, but it's been so dang stable I haven't had to touch it in a while!. 2 slots Mobo Advice upvote gpart add -t freebsd-zfs -a 1m -l "name" -s 120G nvd0 Chelsio T520 CR Dual SFP+ NIC using fibre to the switch LSI 9305-16i IT Mode SAS HBA SAS3008 on board in IT Mode TrueNAS-SCALE "Dual Intel Optane in Mirror as Logs for Multiple Pools" Similar threads L. 2x Samsung 850 EVO SSD 250GB with 1x Transcend 32GB SSD370S SLOG (ZFS mirror) 2x Transcend 32GB SSD370S (ZFS mirror. If you want the mirror for high availability (uptime), the way to do it is not through ZFS mirror, but through a combination of an actual hardware RAID controller and ZFS. When reading data from a mirror, zfs only needs to read from one drive. I also have 2 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. 0x4 dual-slot card will be used for my boot mirror (a pair of 480 GB PCIe 3. To create a mirrored pool, use the mirror keyword. as a single controller or as a dual-controller system. To configure multiple mirrors, repeat the keyword on the command line. Putting a CoW filesystem in a volume on top of a CoW filesystem is at best a performance hit, and at worst a performance nightmare. 1TB mirror + 2No. If you ask for a big chunk of data, or 2 files at once it might read from both at the same time, and obviously writes need to go to both drives. A lot will depend what your ultimate goal for the system is. (i. 0x2 speeds (assuming each NVMe gets half performance from the switch, which is probably oversimplifying I have a ZFS mirror (4Tb x 4) in a USB enclosure that's now in the following state: # zpool status pool: doppelganger state: UNAVAIL status: One or more devices are faulted in response to persistent errors. That way it I have had my ZFS setup as a mirror with two 10TB disks and it has worked without an issue for the past year even with me beating it up quite a bit. 04. They provide much higher performance than raidz vdevs and faster resilver. Although depending on your storage needs, you could possibly do a 2-disk mirror on the Win side for testing and a 6-disk RAIDZ2 on the dual-boot side to minimize risk exposure. The additional space is immediately available to any datasets within the pool. Small and fast SSD-s are also very cheap these days. It's because of how parity works on both of them. System Requirements Ubuntu 22. 04 and instructions for Ubuntu 22. If you are looking to install on a Raspberry Pi, see Ubuntu 22. 4TB mirror + 1No. add in a 5th drive if you want a warm spare, or make it 6 drives if you want to run 3-way mirrors. This means it’s a lot lot slower than the previous 2. 2Ghz Xeons and 2x36GB 15k SCSI disks. My conclusion was that by specifying mirror1 dev1 dev2 mirror2 dev1 dev2 etc zfs would figure it out itself. I'm not able to find a clear yes/no answer to this simple question: does using ZFS in mirror mode double the read performance of the underlying vdevs? This applies to either individual requests or net performance (i. I know I can do zpool attach rpool [currentDisk] [newDisk] MBR->GPT, dual boot, etc upvotes ZFS has lots of built in optimizations that work best when used without Raid controllers. 5" to mSATA converters and 2x SLC 24GB Intel mSATA drives. 0 for this test system setup to eventually test dual mirror pool zfs native encryption. haven't noticed ZFS on pfSense using any more RAM than UFS used to, guessing they've tuned the ARC to be quite shallow. Short answer: Mirror Long answer: Having two drives gives you the following options: Stripe ("Raid 0"), Mirror ("Raid 1") and Raid Z1 (one parity drive). win in my book given I have drives of mixed ages at the moment. I want to dual-boot with windows and pop-os and I'm trying to make a partition to have pop-os on. You can remove mirror and single vdevs from a pool, you can't w/ raidz. Can ZFS be used on a pool made of customer 1 xASUS Z10PA-D8 (LGA 2011-v3, Intel C612 PCH, ATX) - - Dual socket MoBo; 2 xWD Green 3D NAND (120GB, I'm thinking about using ZFS on a mirror with two Samsung 860 Pro for storing Proxmox-VMs. Joined Aug 26, 2014 Messages 187. Intel Pentium Dual-Core E2200 4 GB DDR2 RAM (non-ECC) 2x HGST HUS724040ALA640 4 TB 7200 rpm SATA disks (bought at the same time, serial numbers are close to each other) Fully custom Ubuntu ZFS boot drives are a thing, of course, and OpenZFS documents them well. 2 expansion card as I thought it was JBOD but alas it isn't and Proxmox didn't like that either. In your case (with 600GB disks) i would go to 6x Vdev in a dual mirror. Mirror the log device, the cache does not need a mirror. You can then still run a few VMs on that as storage allows. 2) Two mirrors, stripe both mirrors onto one pool. Since my backup directory takes way less than 2TB (and I don't see myself using more than this any time soon), I've been considering the following setup: So, say you have that hybrid pool with a 4 disk raidZ2 and a 2 disk mirror. About 600-700 MB7s read and 400 MB/s write with 6 x Exos 2x18 in RaidZ2 and mirror Replication Features of a ZFS Storage Pool. though a few drives in my array are relatively new. I wanted a ZFS mirror, without going through an entirely manual setup of Ubuntu as described by OpenZFS in their instructions for Ubuntu 20. Aiming to mostly replicate the build from @Stux (with some mods, hopefully around about as good as that link). Stripe doesn't make sense for you, as this would increase risk. Maybe a cron job looked at the directory tree in that pool (just a guess). I can configure the bios to mirror the two disks, and then put ZFS on Dual ZFS mirror vs Raid-Z2 vs Raid-Z3. mirror. My containers and vm's are on the same disks and backed up to a separate zfs raid array. I created it using this command: # zpool create poolname mirror da0 da1 mirror da2 da3 I could basically just keep that array and add more mirrors to it, but I have enough drives that I could destroy it and create two 4-drive Z1 arrays and then mirror those. 01 Plus (upgraded) on a whitebox still on UFS. Dual Boot ESXi and Windows 10 on Desktop Disk /dev/sdb: 931,5 GiB, 1000204886016 bytes, 1953525168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: EA14D367-371A-114C-8270-19C3E3F51C2C Device Start End Sectors Size Type /dev/sdb1 2048 1953507327 Hi All, I have a proxmox server with 2 x Samung 970's. My possible solution is to start with two drives. Running my OS at 3. Resilvering might took a very long time and it could by to risky. If you do buy another drive, preferably 6TB, you can add a second Mirror vDev of 6TB. Raspberry Pi If you are looking to install on a Raspberry Pi, see Ubuntu 20. action: Destroy and re-create the pool from a backup source. HI All, It looks as though I may have setup my new promox home server incorrectly for the ZFS raid 1 boot. I fail to see how that is faster than RAIDz1. I have been thoroughly confused about how exactly zfs chooses to mirror eg to get equivalent of raid 10 / striped mirror. Este valor pode ser ajustado a qualquer momento com sysctl(8). 8 drive ZFS raidz2, recordsize=1M. In addition, you can create more than one mirror in each pool. redundant vdevs (aka mirrors – think RAID1) 3. Then the 2TB SSD and NVMe can be used as needed for either other VM hosting or data storage. Result: one pool. And, if it is possible to grow up a UFS or ZFS partition, I never found the means to shrink them. Performance is good, but LUKS sits underneath ZFS, so if multiple disks (mirror or raidz topologies) are used, the data has to be encrypted once per disk. 7. 5 hotswap bay delock ; Dual Intel 10G (ix driver) P. Mirror EFI system partitions, allowing booting from either in case one fails. 1 (“jammy”) Desktop CD (not any server images) Dual N-Back; CRB Explorer; Anagrammatist; Unmap; Curriculum Vitae; ZFS Mirror to RAID-Z Another geeky post here, because these are somehow easier to write than more personal posts. 1. During the install of the ZFS tool chain on Debian I have been asked if I want to upgrade the pool or not. Looks like this was posted over a year ago (Sep 25, 2014) but still very helpful. If one drive could handle 100 reads a second and the other could handle only 10 reads a second, you'd end up with about 110 reads from that mirror pair. This way, hardware/software reliability will be at least more or less consistent Once you abstract the hardware away, ZFS is completely inappropriate. Though, the performance will be of the slowest also. It is basically zfs specific implementation of raid5 and generally is very bad idea on large drives. 6GHz P4 system and 1GB RAM with dual SATA’s so the overall times for the runs are not comparable at all To convert a single drive ZFS pool into a mirror we cannot use the zpool add command, we have to use zfs attach instead (see the manual page for more information). Doing some basic dumb "dd" read testing from an NVME zfs mirror. I have a laptop with a single NVMe and dual boot FreeBSD and Debian. After creating the mirror, I would format my 4 TB drive to ZFS and use it as an external backup for only the most important files. zfs set compress=on zroot Create a Boot Environment hierarchy zfs create -o mountpoint=none zroot/ROOT zfs create -o mountpoint=none zroot/ROOT/default mount -t With email configured I get notifications from `zed` on ant ZFS issues and `smartmontools` report anything unusual with SMART statistics. Detach wonky 1TB drive after resilvering completes. zfs: How to create pool of two existing vdevs, then mount it. Zpool with 1 x MIRROR (Samsung, WD, Hitachi) + 1 x MIRROR (Samsung, WD, Hitachi) This would give me 2 x 2TB = 4TB of storage roughtly with 2 HDDs of redundancy in each mirror allowing up to 4 consecutive disk failures. You can perform a scrub of the pool to verify all data on all disks matches the checksums. Instead of having Proxmox handle the ZFS array, I decided to create an OMV (OpenMediaVault) VM with Zfs mirror pool with the disks of your choice even before the system boots up for you to install vms. I would create a mirror using only half the capacity of each disk. 8 drive ZFS raidz2, default settings. With the first option, you can lose one disk from a mirror without losing data. The initial backup server is another hardware box. NugentS MVP. 2 drive. Check the videos out here: Buy Yours Here SAS3 Exos 2X18 18TB SAS3 Dual-Actuator 12Gb/s HDD Exos 2X18 16TB SAS3 Dual-Actuator 12Gb/s HDD SATA3 Exos 2X18 18TB SATA3 Dual-Actuator 6Gb/s HD Hey, thanks for the reply, I finally found time to tinker around with this some more. ZFS is a combined file system and logical volume manager designed by Sun Microsystems. But recently due to worry about loss of data I would like to buy another 500GB (not M. Proxmox A few months ago I migrated from a single proxmox instal to a mirrored array using a supermicro pcie dual slot nvme card 9my motherboard doesn't have native physical nvme support), and ever since, I have noticed very slow VM 31K subscribers in the zfs community. I have searched but cant seem to find a recipe for the easiest way to do this, expect for fresh install, which I would like to avoid as this node is part of a cluster. 3) One RaidZ2 with four disks. HP 560SFP+10GigE dual-port NIC Boot SSD ADATA SU630-250GB HDD pool 6x14 TB Seagate EXOS16 Z1, SSD pool 2x960GB Micron 5100 Pro mirror 2x 280GB Intel Optane NVME SSD (U2,AIC update. Dec 15, 2020 #2 JMOR said: In ZFS, each vdev (talking large implementations) The the second recent attempt to configure zfs root filesystem using four ssd disks rewards the Nerd with a working system model for deploying bit rot resist TL;DR: I have a mirror vdev; what would you do to expand this. I have them currently set up as a 2x4TB mirror vdev and a 2x2TB mirror vdev in one pool which is great space wise as I'm able to effectively have ~6TB. https://forums. 1) Two mirrors, one mirror each into a pool. 2TB mirrors + 1No. I already have all the parts which include 128gb of ECC RAM with dual E5-2650s. I've disabled all the NVME RAID functions in the BIOS but I still cannot create a mirrored ZFS pool. Step 1: --If you want reliable ZFS, dual-boot to Linux (or supported BSD) or run it in a VM with disks passed thru. Installed it on 500GB nvme M. I started digging into the issue and I noticed I may have selected an incorrect ashift size. This is for a final home backup server. The four drives being used currently are two 2-drive mirror vdevs, e. Then (if desired) detach 2TB drive as well, leaving you with a single 1TB drive again. I need to enlarge the root pool. This is a homelab, so it isn’t “really” an issue, but even just apt upgrade on simple ubuntu server VM’s takes a while, and if Should I go ahead and mirror the two drives, Raidz1 has nothing in common with raid1, regardless of somewhat confusing naming. 7 KB · Views: 310 FreeNAS 9. But I am uneasy with the I'm upgrading my simple single-disk file server to a proper NAS with multiple, mirrored disks, and want to start using ZFS on them. Share Add a This server is a dual node server on the same power supply, however it is a dual power supply system and both so while I'm not disagreeing that its a power supply issue, Just the boot drives are on the ZFS mirror which is using a whopping 2. 0-U6 Black-Freenas Asrock A75M-HVS mobo AMD A8-3870 APU socket FM1 16GB non-ECC RAM 40GB Intel 320 series SSD boot disk 1No. e. You can change the amount of redundancy in a Mirror vDev by adding or removing Mirror elements. Storage capacity doesn't change either way. 25 GiB, 960197124096 bytes, NAME STATE READ WRITE CKSUM zroot ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 gpt/zroot-1a-F764 ONLINE 0 0 0 gpt/zroot-1b-808H ONLINE 0 0 0 mirror-1 zfs create -o acltype=posixacl -o dnodesize=auto The drives are on two 4 x M. At SATA SSD speeds, the extra housekeeping ZFS does isn't a scale problem, even with itty bitty (x86) CPUs. Reply reply stealthbootc • Dual M. I use a ZFS pool on one partition to share HOME. ZFS 3 Way mirror. Now, I want to share the same pool between the above OSs. You could also do this with a two-way mirror, but you'd be down to single drive failure tolerance AKA none. Sending to a new pool would be easier for that, the only difference would be the pool name and at the very end you'd just export both and import the new one w/ the old name. But I do experience poor perfomance to my understanding. It worked and rebooted fine. simplest option is four 4TB drives, in a stripe+mirror configuration (the ZFS version of RAID 10). This assumes you have the following: So if I'm not a total moron, a ZFS mirror is unquestionably faster than any conventional RAID6 or RAIDz2/RAIDz3 configuration. Joined May 2, 2015 Messages 10,080. If you want to add a vdev/mirror, then partition the drive, and replace an existing half-mirror first, which would free up that half of a drive, to combine with the leftovers new The PCIe 3. If you absolutely want to do it, use Intel Optane M10 (1x $22 for 16G on Amazon). Once my pool gets to 85% Use zpool attach tank existing-disk new-disk to add a disk to an existing disk in the pool,so it becomes a mirror if it was a single disk vdev, or a three disk mirror if it already was a two disk mirror. In the case of a dual-controller system, (mirror and RAIDZ), data reduction (inline compression and deduplication), The current Oracle ZFS Storage Appliance OS is a 64-bit architecture to increase virtual memory address space. I tried using the ASUS Hyper M. If you lose two disks from the same mirror, then that pool is gone. I have 2 new 8TB drives ready to replace both drive&hellip; My NAS has a pool of 6 Use OS tools (mdadm for Linux, gstripe for FreeBSD) to connect the two X drives to a single physical device that can be mirrored with the 2X one. 2GB Reply reply The lz4 compression algorithm is fast enough to be used by default, even for incompressible data. So most of the time the system (configured as a 3 ZFS mirrored drives) will work only with two drives. The following command creates a pool system1 with two top A pool is a collection of vdevs. So when I add a vdev to expand my pool, I just don't really worry about it. I have 8 identical 3TB HDDs. When I can afford a more drives I would would create a new zpool with a single Recently, one drive went Faulted and the second drive in that same mirror went Degraded. What are the most benefits here? Or does it cause more issues than its worth? Thank you! ZFS Glossary; M; mirror; mirror. Another option AFAIK, it's the only option so far that lets you boot from zfs mirror with mirrored uefi partition, and fully keeps it in sync and bootable and supported. Apr 7, 2018 #54 28 Replies to “ZFS Performance: Mirror VS RAIDZ VS RAIDZ2 vs RAIDZ3 vs Striped” Eric Pardee December 24, 2015 at 3:01 pm. ZFS mirror ubuntu boot drive Raw. lexqslx rkuj ibf emxxj ivjn objok dphxlvz pateb qexsge bpbujnz