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 ArticleLarge number of snapshots on a ZFS system
Here's my scenario: I have two servers (well many more, but two for this scenario), one is a Solaris backup server, the second is a CentOS Linux Server. Every night the CentOS server runs a cron job to...
View ArticleZFS - Recover or repair a corrupted file in a snapshot from backup?
A pool has suffered permanent data corruption to file data that's part of a snapshot. If the file data was part of the filesystem (and not part of any snapshot), I could simply recover the file from a...
View ArticleZFS scrub load average is ridiculously high
I have a relatively new box here running Ubuntu with ZFS-on-Linux across an 18-disk array. The first couple of times I did a zpool scrub, it seemed like everything worked nicely, but the last several...
View ArticleHow can I tell which ZFS snapshots are affected by an error?
A recent scrub of my ZFS pool uncovered one error:$ zpool status -v rpool pool: rpool state: ONLINEstatus: One or more devices has experienced an error resulting in data corruption. Applications may be...
View ArticleRecommended way of transferring an šššššš jail from one host to another
Source: iocage thick jail running on FreeBSD-12.0p12.Destination: FreeBSD-12.1p1.Both hosts use ZFS.What is the recommended method to transfer an existing iocage thick jail from the source to the...
View ArticleOOM after files remove with ZFS and deduplication
I have recently posted the issue I'm facing on github: https://github.com/openzfs/zfs/issues/16697In short, I have a VM with 32vCPUs and 64GB RAM, ARC is limited to 32GB RAM. RAIDZ1 pool with...
View ArticleZFS deduplication
This is my first post on this website so please be kind with me :)On Centos 7, using ZFS deduplication in the past on a storage pool, I moved all file-systems that dedup was on to another storage...
View ArticleHow to move a *deduped* ZFS filesystem from one pool to another
I have a ZFS filesystem which uses dedup [1]. I'm trying to migrate it to a different pool by using zfs send | zfs receive (as described in Moving a ZFS filesystem from one pool to another for...
View ArticleIs it possible to detach and reattach a ZFS disk without requiring a full...
I have a ZFS mirrored pool with four total drives. Two of the drives are intended to be used for rotating offsite backups. My expectation was that after the initial resilvering I could detach and later...
View ArticleBash script error when trying to create a snapshot
I am trying to create a snapshot using Bash script as below but error occurred.Environment: FreeBSD,Version: 13.2,Script: Bash#!/usr/local/bin/bashname="17102023_1234"zfs snapshot data/library@$namerun...
View ArticleHow to remove a vdev device from a Solaris 10 ZFS pool
I added a disk to a Solaris 10 server and was trying to add the device to an existing single disk pool as a mirrored device however, instead of using the "zpool attach tank c1t5d0" command, I used...
View ArticleDoes ZFS have persistent inode numbers or something similar?
I am wondering if ZFS has persistent inode numbes for files, like EXT does, or if it has something similar with which individual files can be identified even if they are moved or renamed. And will...
View ArticleZFS RAID 10 on Ubuntu 24.04: Issues with /dev/disk/by-id/
I'm having a small issue with a Github Repository that I created. The intent of the Repository was to automatically install Ubuntu 24.04 on a ZFS RAID 10. I chose ZFS RAID 10 as this is meant to...
View ArticleHow to replicate ZFS-based PVCs created by OpenEBS LocalPV CSI across nodes...
I have a multi-region, bare-metal Kubernetes cluster that uses Tailscale and flannel for cross-node networking. For storage, Iām using the OpenEBS LocalPV ZFS CSI driver on two specific worker nodes,...
View ArticleZFS Rollback not including all files
I messed up and accidentally deleted a everything in a dataset of many subdirectories. Luckily I have daily snapshots and nothing had changed so I did a rollback to the most recent snapshot. After the...
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Rollback to a previous proxmox snapshot without losing the current zfs snapshot?
Using proxmox with ZFS storage pools, is it possible to restore an LXC container or QEMU Virtual Machine to an earlier snapshot (not the most recent snapshot) without losing or destroying any...
View ArticleWhy does calling chown and chmod that does not change anything create...
On our server we have got a cron job that regularly calls chown and chmod for a directory in a ZFS file system. Usually that does not change the user and the rights because the directory already has...
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, Iād 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...
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