Questions tagged [zfs]
ZFS is a modern file system and volume manager originally developed by Sun Microsystems and licensed under the CDDL. It is a copy-on-write file system with support for large storage arrays, protection against corruption, snapshots, clones, compression, deduplication and NFSv4 ACLs. An open-source fork of ZFS can be found at http://open-zfs.org/ , which is supported by ZFSonlinux.org, illumos.org and ZFS developers in the FreeBSD & Mac OS X communities.
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Corrupt zpool disks not being discovered. How do I rebuild?
I have a Proxmox server with a few zpools. One of the zpools rust01 is a 4-disk zpool, where the metadata and write cache were some nvme m.2 drives on the motherboard (one for each - I know, stupid, ...
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Storing large amount of small files in HDD pool [migrated]
I have a Z6 HDD pool with 6 x 18T drives and a SLOG, LZ4 compression is enabled by default. Now I need to store large amount of small files and I'm worried about fragmentation.
The files:
70K files ...
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ZFS with different sized disks, for greatest size and redundancu
I currently have 4 hard drives
2x 12TB
1x 8TB
1x 4TB
I'm quite new to ZFS, but I'm trying to work out what combination I can use to give me the best greatest amount of space, with the best amount of ...
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COW filesystems (BTRFS, ZFS, bcachefs) scrubbing and RAID1 with mdadm on Linux
Suppose I create a two disks RAID1 volume with mdadm and then create a BTRFS/ZFS/bcachefs partition on it.
Than data on one of the two disks gets corrupted.
If I perform a scrub, there's no way for ...
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zfs, possibly bad performance
I am looking to confirm if this behaviour is normal as I got a new server and I am testing some SQL queries and they seem to be slightly slower than on the old machine. This is freebsd 14.1
When I ...
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What are potential dangers of spanning ZFS RAIDZ over different size disks? [closed]
I am redesigning my homelab servers from scratch, and want to try ZFS after experimentation I've done.
I know there is a limitation that disks in vdevs must all have the same size, otherwise only the ...
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ZFS import unable to find any pools on RockyLinux after Reboot
I had a single ZFS pool comprised of 8 (6/2) drives in a ZFS pool and after my server was down for ~5 days of no power the zpool I had created no longer shows where I mounted it. When I first access ...
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Is it possible to change zfs raid-z1 to raid-z2 or raid-z3 on for instance TrueNas scale
I have a running truenas-scale zfs on raid-z1. For safety I though of increasing parity when adding a new disk.
Asking the same question as someone asked 10 years ago,
is it possible with the current ...
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ZFS pool disappear after reboot
We have a ZFS system installed on Ubuntu 20.04.
Apparently, there was an electrical shutdown this week end, and when rebooting, the ZFS pool is no longer there.
zpool status -v gives : no pools ...
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Cannot send snapshot XXX recursively: snapshot dataset/nestedDataset@XXX does not exist
I performed a snapshot pruning 2 days ago that resulted in some issues on the snapshots. I incurred some light data loss because, I suspect, some snapshots were created as "clone snapshots" ...
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How to get IP details of passive cluster?
I have Sun Oracle ZFS storage ZS7-2 model. It is a 2 node cluster active and passive.
Unfortunately I have only active node IP details to login.
Can anyone help me on how to get passive node IP ...
siva swamy
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Impossible to make space on full zfs pool
I have this zfs pool which seems to be full because of some reservations
# zpool get all data2
NAME PROPERTY VALUE SOURCE
data2 size ...
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Comments on new SAN for small enterprise
We currently have 4 FC arrays containing sixteen 300GB drives each in a Sun StorageTek 6140 chassis connected to an old Sun X4170 M2 server running OpenIndiana. This has been working well for the past ...
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How to set a quota on Logical Disk Space (logicalused) in ZFS?
I am currently using ZFS and need to set a quota on the logical disk space (logicalused) rather than the physical disk space used after compression. The quota and refquota properties in ZFS set a ...
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ZFS 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, ...
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Data corruption in Windows Server VM on Proxmox
I ran into a strange data corruption issue in a VM running on Proxmox VE which I need help with. The VM in question is Windows Server 2016 Standard, used primarily as a file server.
On this VM, I ...
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ZFS: resilver restarted after the scan finished
As described here I had two dead drives on my raidz2 setup. I shut down the machine, replaced one drive, then booted up. My idea was to resilver disks one by one, but the resilver process for the ...
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180
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ZFS folder very slow after having many files
I am running Ubuntu 24.04 using ZFS for my filesystems. This is on a laptop whose only storage device is a WD Black SN850X NVMe card. The default Ubuntu installation process configured two ZFS pools:
...
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ZFS "cannot open" and "too many errors"
I got an alert this morning that one of my arrays was having a problem. I can't seem to get past it. I'm not sure how to proceed.
admin@ICSSAN1:~$ zpool status -v
pool: SAS_Array
state: UNAVAIL
...
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How I do recover from an offline, but OK drive on a ZFS mirror?
I have a ZPool consisting in two drives in a mirror configuration. It seems that during server manteinance (cleaning), one of the drives went offline because the wiring came lose.
# zpool status -v ...
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ZFS disk replacement identification?
I am still a newbie with ZFS. We had a faulty disk in a ZFS pool (using Ubuntu 22.04.2. LTS). It had been replaced automatically by a spare disk (I try to quote only the relevant parts):
zpool status ...
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ZFS ARC ghost memory usage
Are arcstats:mru_ghost_evictable_metadata and arcstats:mfu_ghost_evictable_metadata the number of bytes stored in RAM by the arc ghost list?
If so, is this memory usage also accounted for in the ...
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Disk does not spin down for unknown reasons - How to debug?
I have a setup where we need to spin down HDDs that host a zfs array for energy reasons. I use hdparm to configure apm = 24 and spindown_time = 24 for all disks.
The system works as expected most of ...
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282
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Repartitioning proxmox root/data LVM and zfs pool recovery
Ok so I created my first proxmox virtual environment about a month or two ago and due to inexperience and miscalculations I created a partition table I am not really happy with. Along with that it ...
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96
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Debian & Broadcom: poor performance transferring files via network
I setup a new server running Debian Bullseye with Proxmox-kernel as a NAS to host mainly video content (so in general large files). I noticed an abysmally bad performance transferring files via SMB so ...
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With ZFS snapshot rollback the file system remains unchanged
Server with latest version available and ZFS File System.
I tried ZFS Snapshot. Below is the list of commands.
First I check if the zpool is available and create the snapshot.
At this point I copy a ...
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227
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zfs pool online but can't be imported "one or more devices is currently unavailable"
I recently moved my zfs pool from a 5 bay drive to a 10 bay drive and it can not be imported any more. The pool (nextcloud) appears to be online but when I tried to import it, it throws "one or ...
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Zpool scrub won't resume after reboot
Linux Mint 21.3
Linux version 6.5.0-26-generic
zfs-2.2.3-0ofthesun1
zfs-kmod-2.2.0-0ubuntu1~23.10.2
I've set up the zpool just fine, put some data on it and started a scrub. While this was in ...
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Restore ZFS Pool after a broken HDD
i lost my ZFS Pool on a trueNAS System due to a failed / broken disk
The Pool was a non mirrored Pool with 4 HDD (6-10 TB each)
I am working on a new trueNAS for backup all the files to a mirrored ...
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382
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XFS / ZFS - Unable to mount filesystem - I/O Error
We have a server with Ubuntu 20.04.6 LTS. It is the secondary storage for our backup, with 12x8TB HDDs in a RAIDZ3, with an XFS filesystem on top.
A couple of days ago, one drive failed. I thought, &...
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Access to ZFS pool when one drive has failed is incredibly slow
I have a ZFS box that I inherited that is having a lot of issues. Checking the status I see there are a few drives with issues:
ganymede $ zpool status -x
pool: dpool
state: DEGRADED
status: One or ...
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ZFS silently overwrites the later mirrored devs, without any logs?
Given two mirrored drives:
/dev/loop1 of zfs1.img
/dev/loop2 of zfs2.img
If the drives contain different data, even if the copies in zfs2.img are newer, or zfs2.img contains extra files, ZFS always ...
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zfs errors on hetzner cloud ubuntu 22.04
I have an ubuntu 22.04 system on hetzner cloud arm machines that keeps experiencing zfs errors, and I am a bit stumped as to what is the problem.
zpool status -v
pool: encpool
state: ONLINE
status: ...
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515
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Zpool Import, one or more devices is currently unavailable
I know this is a pretty common question, but I haven't found a situation quite like mine.
To cut it short, I had a ZFS pool on my home server on bare metal of proxmox, wanted to move it to an open ...
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Upgrade OS on ZFS file server
I need to upgrade the OS of my ZFS disk server from CentOS 7 to Rocky Linux 9. I am currently running ZFS 2.0.7, and if I'm correct Rocky Linux 9 uses 2.3. My tentative plan is to use the AlmaLinux ...
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FreeBSD ZFS raidz1 Started a (da59) drive replacement. During resilver, second drive (da60) failed
Our system started slowing down... Found a couple of drives in the same raid that looked scary.
Replaced the drive that S.M.A.R.T. marked as failure eminent. (da59)
Then da60 started to error.
Finally ...
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527
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change disk cache settings on Samsung PM9A3 via nvme-cli
I will be running Proxmox guests on a ZFS volume consisting of Samsungs PM9A3 NVME drives. I read here for ex. it might be an advantage in performance to keep the cache of those drives active.
So I ...
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1
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ZFS 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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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 ...
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df reports zfs used space as 128K, not the actual used space
I have a ZFS mirror pool in my Proxmox instance. I am trying to get it to mount to an LXC container read-only (preferably not giving full filesystem access) so I can have Homepage detect the used and ...
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420
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ZFS requested features not enabled
I am running a TrueNAS (formerly FreeNAS) based server for about six years now. It is currently running TrueNAS 13.0-U6.1. There is a "boot pool" and a "data pool", both installed ...
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Is it possible to backup across multiple hard drives?
I'm going to be setting up an 8x20TB ZFS RaidZ2 with no spare. This will give me roughly 100TB of storage for large 3D model files.
I want to purchase some extra HDDs so I can periodically backup and ...
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140
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zpool mismatched replication level
I have accidentally added a mismatched raidz1 to an existing pool. Yes, I specified the '-f' to do it, but I was expecting to use the '-f' for a different reason and wasn't paying attention.
Anyhoo......
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ZFS still writes to HDDs vdev while dataset is configure to store special for Docker
I'm facing a strange behaviour when using Docker together with ZFS.
I have one pool with 2x10TB HDDs as mirror vdev and 2x250GB NVMEs as mirror for special vdev (to store metadata and datasets with ...
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ZFS scrubbing keeps reparing disks
I've got two SSDs in a RAID 1 (mirroring) configuration on ZFS. They are quite old (~10 years I guess) but have never been used much in these years. That's my configuration
pool: tank
state: ONLINE
...
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1
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381
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Recover ZFS mirror from pool with unavailable device
I tried to expand my two-way mirror to a three-way mirror. The new drive had some filesystem issues (ext4) so I tried to force zpool add -f the drive for ZFS to handle for me. This led to a weird ...
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/dev/zvol/pool/group/srv points to partition zd0p16 not volume zd0 - bug or feature?
I am only starting to get familiar with openzfs 2.2.0 on Linux (Ubuntu kernel 6.5) and immediately ran into something strange. A symlink I was expecting to point to a zvol block device.. was pointing ...
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3
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380
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FreeBSD - Is it possible to create a clone of a snapshot in a different disk for improved performance?
I am a new to FreeBSD and want to make a virtual disk service via iSCSI.
I create snapshots of a dataset on the same disks, however I would like to create clones on a different disk like a NVMe drive ...
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106
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ZFS list - root mounted twice?
I've followed this guide to install ubuntu with root on zfs. I've skipped creating all the dedicated (sub) datasets in step 3.3. Now "zfs list" looks like:
NAME USED ...
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