How do I determine if the device needs to be replaced

OpenZFS
1

Context: Noob-ish user with Ubuntu based DIY NAS.

I think I understand the following message. A disk experienced 31 checksum errors, and probably has encountered 10 faulty sectors.

My question is, how do I determine if I just run zpool clear for now or replace this disk asap?

$ zpool status
  pool: bigdata
 state: ONLINE
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 repaired 0B in 10:34:20 with 0 errors on Sun Sep 10 10:58:21 2023
config:

	NAME                        STATE     READ WRITE CKSUM
	bigdata                     ONLINE       0     0     0
	  raidz2-0                  ONLINE       0     0     0
	    wwn-0x5000cca099cf2fb7  ONLINE       0     0     0
	    sdh                     ONLINE       0     0     0
	    sdb                     ONLINE       0     0     0
	    sdi                     ONLINE       0     0     0
	    sdf                     ONLINE       0     0     0
	    sda                     ONLINE       0     0     0
	    sde                     ONLINE       0     0     0
	    wwn-0x5000cca252e69d40  ONLINE       0    10    31
	    sdk                     ONLINE       0     0     0
	    sdd                     ONLINE       0     0     0
	    sdc                     ONLINE       0     0     0

errors: No known data errors
3

The fact that you’re seeing nearly as many write errors as CKSUM errors makes it more probable that the drive itself is faulty, not just cabling.

You could just let that ride for a while, but I wouldn’t recommend it. Replace the cable with a new one, zpool clear your pool, and watch for more errors. If you keep getting errors after replacing the cable, replace the drive immediately.

2

I would check cabling first if those aren’t m.2 disks. You have enough redundancy that I’d feel safe clearing the error and seeing if it happens again.