zfs module not found on centos after restart
After I rebooted a CentOS server, ZFS does not work:$ sudo zfs listThe ZFS modules are not loaded.Try running '/sbin/modprobe zfs' as root to load them.$ sudo modprobe zfsmodprobe: FATAL: Module zfs...
View ArticleMounting ZFS drive with Proxmox
I am being challenged with an encrypted hard drive that is not mounting on Proxmox. The drive is LUKS encrypted and it is a ZFS file system. The name of the drive in question is /dev/sdc It is worth...
View ArticleZFS - enable or disable disk cache?
I'm setting up ZFS (through FreeNAS) with RAIDZ1 on a server with 4 x WD Red SATA HDDs (connected through a PERC H330 in HBA mode).The server is hooked to a UPS.For ZFS and in this setup, does it make...
View ArticleShould datasets be mounted inside directories in ZFS for Linux?
On my recently set up machine I use ZFS under Linux Mint (LMDE 6) for creating storage pools and using the ZFS filesystem.The specific storage setup is four 1 TB HDD arranged in RAID-Z2 topology.The OS...
View Articlezfs recv keeps trying to make another subpool with the same name on...
I'm having a weird issue with zfs incremental snapshots. Let's say I have the following volumes. kirssy is the backup for abby:NAME USED AVAIL REFER MOUNTPOINTabby 8.20T 4.40T 192K /mnt/abbyabby/main...
View ArticleDocker stuck on zfs clone
I have a /var/lib/docker on zfs dataset, and docker create many legacy datasets.Now when I try to start any app in docker it stuck on zfs clone.on iostat disk don't have any load (other dataset on same...
View ArticleHow to backup Truenas Core (ZFS) snapshots to S3
I am happy I just setup a cloud sync task on my Truenas Core to S3. All seems good. However, I understand this is merely a filecopy/sync task and doesn't it make more sense to use the ZFS superpowers...
View ArticleZFS Pool FAULTED - The pool cannot be imported due to damaged devices or data
Ive been recently testing/running zfs with no issues until today when carrying out some scheduled server maintenance (reboot) to find the pool has faulted upon reboot.Ive tried to force import but i...
View ArticleUpgrade ZFS from 0.8 to 2.3.0 version
I'm going to upgrade an old server from ZFS 0.8 to version 2.3.0 and want to clarify a few key points before proceeding.If anyone has experience upgrading from 0.8 to 2.3.0, I’d greatly appreciate your...
View ArticleZFS Recover from Faulted Pool State
I have a six disk ZFS raidz1 pool and had a recent failure requiring a disk replacement. No problem normally, but this time my server hardware died before I could do the replacement (but after and...
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ZFS array experiencing errors after hardware upgrade
I upgraded the system board, CPU, and RAM of our main server. The server does weekly scrubs and twice weekly backups to the backup server. I created a fresh snapshot and pushed it to the backup server...
View ArticlePooled storage with varying redundancy per file system
I have some files that I want stored mirrored. I have some files that I only need single copies (i.e. scratch data, easily regenerated data, etc). And I have some files that are so critical, I want it...
View ArticleImport ZFS with faulted device, missing ZLog and corrupted data on a foreign...
I have an Ubuntu 24.04 Server with 4x4TB SSD in a Raid5, an additional NVME as ZIL. Now, for unclear reasons, the server became unbootable and I plugged all disks into another Server. I still cannot...
View Articleupgrading zfs-linux with active zpool and /home mounted to it
I am running zfs-linux on a Linux Mint (LMDE 6) machine for maintaining a RAID-Z2 storage.The home directory is its own dataset with mountpoint=/home.zpool/home cannot be unmounted by non-root user....
View Articlezfs/zpool - how to remove hole in vdev_tree?
I have a zpool in use with a single mirror vdev. I needed more space, so I hooked up some more disks and added a second mirror vdev. Easy enough, now I have a zpool with mirror-0 and mirror-1 vdevs.But...
View ArticleMount a non encrypted ZFS partition from a backup on another FreeBSD system
r@bsd:~ $ geom disk listGeom name: cd0Providers:1. Name: cd0 Mediasize: 0 (0B) Sectorsize: 2048 Mode: r0w0e0 descr: QEMU QEMU DVD-ROM ident: (null) rotationrate: unknown fwsectors: 0 fwheads: 0Geom...
View ArticleCannot unmount with zfs unmount or umount after zfs receive
Running TrueNAS SCALE 24.10I did a zfs send and receive with a -F on receivezfs destroy fails because it cannot unmountzfs unmount fails with unmount failedumount fails as well with not mounted.A...
View ArticleHorribly messed ZFS pool after power cut
After a hard power cut and a UPS failure y ZFS pool is in a state I cannot understand:$ zpool status -c serial pool: storage state: DEGRADEDstatus: One or more devices could not be used because the...
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dRAID, Parity 1 + 1 Distributed Spare Better than basic RAIDz2 for 5x12TB HDDs?
Stumbled on dRAID recently and was grokking the docs for OpenZFS on linux and I came away with a conclusion from the chart that I wanted to double check.This is a brand new system that I'm currently...
View ArticleDisadvantages of using ZFS recordsize 16k instead of 128k
I'm using Proxmox on a dedicated server. For production I'm still using ext4, but I decided to start messing around with ZFS.So I have created two separate ZFS storage pools with diffrent...
View ArticlePossible to start a RAID1 setup with a single drive?
Can I start a ZFS pool with a RAID1 setup using a single drive, and then add another one later?Running Proxmox VE 7.2
View ArticleRun ZFS as non-root
I'm running Debian 10 in a VM (using KVM) and I want to use ZFS as a non-root user. Here is what I did. I added this line to my sources.list filedeb http://deb.debian.org/debian buster-backports main...
View ArticleZFS best practices with hardware RAID
If one happens to have some server-grade hardware at ones disposal, is it ever advisable to run ZFS on top of a hardware-based RAID1 or some such? Should one turn off the hardware-based RAID, and run...
View ArticleWrite Errors SAS SSD with Adaptec ASR-71605 Controller on Supermicro Server
I am stumped about what might be causing some sporadic write errors I've been seeing after making a change to my file server, hoping someone here can help narrow down the root cause. My first suspicion...
View ArticleFreeNAS: Renaming a zpool
Now that our server is set up, I would like to rename our zpools.I read somewhere that the way to do this is export & re-import under the new name. But will all my mount points and shares remain...
View ArticleZFS pool continually DEGRADED or FAULTED
I've got a pool in raidz1-0 with 5 drives in it. I'm not sure exactly when, but all of the sudden all the drives went from always being ONLINE with no read, write or checksum errors to randomly...
View ArticleZFS Kernel Panic Issue and Troubleshooting Steps
Experiencing kernel panic with the error message "PANIC: zfs: adding existent segment to range tree" when attempting to import the ZFS pool (rpool). The system hangs upon import attempts, making it...
View ArticleZFS: slow read of empty sparse zvol
I'm using RAID-Z2 with 8x8TB disks. Pool almost entirely empty. I created a zvol like this:zfs create -V 1T -s -b 4096 "$ZVOL"zfs set compression=off "$ZVOL"zfs set logbias=throughput...
View ArticleHandling XenServer snapshotting and cloning with ZFS SAN
I'm planning on setting up a XenServer machine that uses a NexentaOS/ZFS-based SAN for storage of the Virtual Disk Images (VDIs) through iSCSI. I know I could just setup a big Storage Repository (SR)...
View ArticleReduce speed of zfs scrub
I have a zfs pool with some NVME devices. In normal usage of that pool over network, the network is limitting IO and everything stays cool and quiet.But when I do a scrub it goes with max IO of the...
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