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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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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TrueNAS Scale, pool split in two after power outage [closed]
I was using the TrueNAS with the ZimaBoard and two HDDs.
Those disks were added in the Stripe pool.
After the power outage the strange thing happen. Somehow the ID of the pool and one of the disks was ...
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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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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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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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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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