Hi Guys,

Recently I built a backup unRAID box and added a few old disks that were laying around. Over the past week unRAID has reported these warnings:

Event: unRAID Disk 3 SMART health [5]
Subject: Warning [BACKUP] - reallocated sector ct is 15
Description: Hitachi_HDS722020ALA330_JK1171YAHB77DN (sdd)

Event: unRAID Disk 3 SMART health [199]
Subject: Warning [BACKUP] - udma crc error count is 1
Description: Hitachi_HDS722020ALA330_JK1171YAHB77DN (sde) <~~~Not sure why this is sde and not sdd; might be caused by a reboot.

Event: unRAID Disk 4 SMART health [199]
Subject: Warning [BACKUP] - udma crc error count is 32069
Description: Hitachi_HDS722020ALA330_JK11A8YBKP5THF (sdf)

I have backup data on the arrray and other than the warnings it seems to function ok.  So, how serious are these warnings/errors? Diags attached. Thanks guys!!

 

 

Edited April 12, 20188 yr by Joseph
Solved

UDMA CRC errors are a connection problem, 9 times out of 10 a bad SATA cable, and they might be old errors, only if it keeps increasing you need to worry.

 

Reallocated Sectors are never good but if it's only a few and it remains stable you should be OK, especially for a backup server, just do regular parity checks so the complete disk surface is regularly checked.

Good to know, Thank you. Marking as solved.