ZFS Data Corruption - What you need to know for TrueNAS, UnRAID, Proxmox and Ubuntu
Source: YouTube · Digital Spaceport · published Dec 9, 2023 · 15:39
Versions prior to OpenZFS 2.2.2 or 2.1.14 contain a critical bug causing silent data corruption during intense local read/write operations 0:00-0:21.
Key Takeaways:
• Slow I/O systems may fail to flush dirty nodes, inserting zeros into files that checksums miss 2:29-3:09.
• Local operations like code compilation are at risk, while NFS/Samba network shares appear safe 3:43-4:00.
• Patches are available in Unraid 6.12.6 and TrueNAS Core 13.0-U6.1, while TrueNAS Scale and Ubuntu LTS updates are pending 5:16-5:48.
• Proxmox users are at high risk and advised to disable block cloning due to potential pre-existing issues 9:13-9:45.
• Mitigation includes setting dmu_offset_next_sync to zero or comparing file checksums against backups 12:06-12:32.
Although hard to trigger, users performing intensive local tasks should update immediately and verify data integrity 13:01-13:16.
Sources:
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Transcript Preview
First 800 characters of the transcript
today we're going to be checking out
what's going on with the openzfs bug who this impacts why this has come about
some of the steps that you can take to mitigate this we're also going to look
at which distros are impacted and I think this is actually something that is
pretty serious so we have the possibility of silent data corruption
and if you're not aware that means that your data which is typically check
summed and validated in a ZFS based environment is essentially still subject
to this that means the check summing would not detect the data corruption
because of the manner that this is actually happening in and it does look
like most all of the modern zfss that have been released in most of the recent
history of most of these distros are impacted by this so we're going to take
a look…