Hi, I had to swap out a 14TB drive in my RAID10 pool (because of enough smart errors). Replaced it with a 16TB disk, and issued a resilver.
This finished without a hitch, and now I’m running a scrub over the pool and it comes back reporting checksum errors.
Current status:
pool: datapool
state: DEGRADED
status: One or more devices has experienced an unrecoverable error. An
attempt was made to correct the error. Applications are unaffected.
action: Determine if the device needs to be replaced, and clear the errors
using 'zpool clear' or replace the device with 'zpool replace'.
see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-9P
scan: scrub in progress since Fri Nov 13 16:08:36 2026
17.9T / 21.6T scanned at 286M/s, 16.6T / 21.6T issued at 267M/s
0B repaired, 77.22% done, 05:21:58 to go
config:
NAME STATE READ WRITE CKSUM
datapool DEGRADED 0 0 0
mirror-0 DEGRADED 0 0 0
ata-WDC_WD161KFGX-68CMAN0_T0GHKY4F-part2 DEGRADED 0 0 26 too many errors
ata-WDC_WD140EFGX-68B0GN0_Y6G4J06C-part2 ONLINE 0 0 0
mirror-2 ONLINE 0 0 0
ata-WDC_WD80EFPX-68C4ZN0_WD-RD2761VH-part2 ONLINE 0 0 0
ata-WDC_WD60EFRX-68L0BN1_WD-WX11DC7JHEKP-part3 ONLINE 0 0 0
mirror-3 ONLINE 0 0 0
ata-WDC_WD120EFBX-68B0EN0_5QJ4E4ZB-part2 ONLINE 0 0 0
ata-WDC_WD120EFBX-68B0EN0_5QJJ908B-part2 ONLINE 0 0 0
logs
mirror-1 ONLINE 0 0 0
ata-INTEL_SSDSC2BA100G3R_BTTV335209Y0100FGN-part4 ONLINE 0 0 0
ata-INTEL_SSDSC2BA100G3R_BTTV3343004X100FGN-part4 ONLINE 0 0 0
cache
ata-INTEL_SSDSC2BA100G3R_BTTV335209Y0100FGN-part5 ONLINE 0 0 0
ata-INTEL_SSDSC2BA100G3R_BTTV3343004X100FGN-part5 ONLINE 0 0 0
errors: No known data errors
I’m somewhat confused as to 1. why these show up, and 2. why ZFS reports ‘0B repaired’ even though it saw 26 checksum errors on the new disk?
SMART reports no issues on the new disk.