# zpool status -v pool: data-2024-06-04 state: ONLINE status: One or more devices has experienced an error resulting in data corruption. Applications may be affected. action: Restore the file in question if possible. Otherwise restore the entire pool from backup. see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-8A scan: scrub repaired 0B in 01:00:45 with 1 errors on Fri Jul 5 03:23:14 2024 config: NAME STATE READ WRITE CKSUM data-2024-06-04 ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 ata-ST4000NE001-2MA101_WS253ZJH ONLINE 0 0 4 ata-ST4000NE001-2MA101_WS254FSH ONLINE 0 0 4 errors: Permanent errors have been detected in the following files: data-2024-06-04@2024-06-10-initial:/server-data6/server-WD-WCAU4C302236-part1/pics/[...]/dsc05151.jpg /data-2024-06-04/pics/[...]/dsc05151.jpg I have a copy of the specific file in question elsewhere. Can I just copy it back? Specifically, on
Restore the file in question if possible
How to restore it?
I copied it over the live file system (/data-2024-06-04/pics/...) and now that entry disappeared, but the first one (data-2024-06-04@2024-06-10-initial:...) is still there.
I'm now running another zpool scrub data-2024-06-04 in the hope that it somehow detects the new file, notice that it matches the checksum and that also fixes the other corruption, but I somehow doubt this.
I also wonder a bit, how could this corruption have happened in the first place? Shouldn't a raidz protect me from this? I don't see any disk errors in dmesg, and the disks are new (Seagate IronWolf Pro 4TB).