Questions tagged [zfs]
ZFS is a combined file system and logical volume manager designed by Sun Microsystems The features of ZFS include protection against data corruption, support for high storage capacities, efficient data compression, integration of the concepts of filesystem and volume management, snapshots and copy-on-write clones, continuous integrity checking and automatic repair, RAID-Z and native NFSv4 ACLs.. -Wikipedia
627 questions
1 vote
1 answer
53 views
Alpine linux failed kernel upgrade and unresponsive keyboard in recovery shell
I tried to upgrade my alpine linux kernel version from linux-lts to linux-stable because support for a device I am installing was added in a newer kernel version. I changed the apk repositories from ...
0 votes
1 answer
45 views
Resend first zfs snapshot
I may have a misunderstanding about zfs snapshots and replication. Assume the following: On the source side I have source/A@s1 source/A@s2 source/A@s3 source/A@s4 This gets replicated to the target ...
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0 votes
1 answer
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Zfs on Linux: How umount and destroy snapshot?
I have this situation zfs destroy -r rpool@1-9-2025 cannot destroy snapshot rpool/ROOT/nas@1-9-2025: dataset is busy So.. umount -v /root/.zfs/snapshot/1-9-2025 umount: /root/.zfs/snapshot/1-9-2025 (...
- 14.5k
5 votes
3 answers
683 views
/boot on ZFS no longer works with Debian's GRUB after "zpool upgrade"?
Let'see what happen after creating a bpool and upgrading as command zpool status suggest root@debian:/boot# grub-probe /boot zfs root@debian:/boot# zpool upgrade bpool This system supports ZFS pool ...
- 14.5k
1 vote
1 answer
192 views
How do I get FreeBSD multiboot to work with zfs
I have one hard drive that I want to split into two separate FreeBSD OS installs and I'm running into a wall trying to figure out how to get it working. I followed Installing FreeBSD Root on ZFS using ...
- 199
1 vote
0 answers
65 views
ZFS: `class=dio_verify_rd` events logged in syslog
I am using ZFS on an Ubuntu 24.04 host and have raw VM images stored on a dataset. QEMU/KVM uses them via <disk type="file" device="disk"> <driver name="qemu" ...
- 947
0 votes
1 answer
84 views
ZFS (ZoL). New VDEVs with larger disks: OK or not?
Can I sanity check something, please? I have a single ZFS pool, containing multiple RAIDZ2 VDEVs, each of six disks One of the SAS JBODs has empty bays in it I'd like to expand the pool[1] by filling ...
9 votes
1 answer
597 views
Is it worth the hassle and risk of reformatting an NVME to use 4K blocks on a ZFS pool created with ashift=12?
I recently upgraded the NVME drives on my workstation machine, from a pair of Samsung EVO 970 512GB drives to a pair of of Kingston Fury 2TB drives. All went well, and I even converted the machine ...
- 85.1k
3 votes
0 answers
92 views
Mapping file UIDs when mounting ZFS on linux
I have a ZFS filesystem on an external drive, but the user ID of my accounts don't match between computers. Is there a way to map the UID when mounting (without actually changing it on the filesystem) ...
- 231
2 votes
1 answer
114 views
New disk array on linux
My son and I are about to head off on and adventure converting 4 disks into one array. Let me give you some background on what the layout looks like today. We are running gentoo linux and have 4 10TB ...
Bejiita78
0 votes
0 answers
306 views
CachyOS (Arch linux based) ZFS root with GRUB on legacy BIOS
I'm trying to install Cachyos on zfs raidz with 4 hdd 6Tb each. Hardware is HP Microgen 8. The system boots and goes to restart after the message "Loading initial ramdisk". Any idea what I ...
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0 votes
0 answers
61 views
External USB drive with zfs pool won't go to sleep (most of the time)
I have an external hard disk with a ZFS pool on it. The data is accessed very infrequently so I would like to drive to go to sleep after some inactivity, which I set to 10min: hdparm -S 120 /dev/disk/...
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1 vote
1 answer
224 views
ZFS refusing to import healthy pool
I'm hoping someone can help me out of this problem. I run a zfs pool comprised of 4 2tb drives. At some point the controller failed, and the pool went offline. knowing it's just a faulty controller, I ...
- 11
2 votes
1 answer
301 views
Which zfs permission(s) is/are needed to change readonly status?
zfs get readonly tank/mydata NAME PROPERTY VALUE SOURCE tank/mydata readonly off local zfs set readonly=on tank/mydata echo $? 0 zfs get readonly tank/mydata NAME ...
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2 votes
0 answers
64 views
Why is my ZFS read performance tanking for RND4K reads and writes compared to an XFS partition on the same drive?
I have a pair of NVMe Crucial P5 Plus partitioned with an mdadm RAID1 partition formatted as XFS for / and another ZFS RAIDZ1 partition for the remainder of the disk. Performance of the XFS partition ...
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