Testing a faulty drive in a RAID 10 NAS

[edgedemon]

I have been experiencing slow transfer times with data on my NAS so I opened a call with QNAP.
They have identified that I have errors on one of my drives.

2020-04-29 02:18:51 +01:00 <3> [46168.111325] res 51/40:08:08:01:08/00:00:00:00:00/e0 Emask 0x9 (media error)
color:#40464D">2020-04-29 02:18:51 +01:00 <3> [46168.126354] ata4.00: status: { DRDY ERR }
color:#40464D">2020-04-29 02:18:51 +01:00 <3> [46168.130366] ata4.00: error: { UNC }
color:#40464D">2020-04-29 02:18:53 +01:00 <6> [46169.829125] ata4.00: configured for UDMA/133
color:#40464D">2020-04-29 02:18:53 +01:00 <6> [46169.833426] sd 3:0:0:0: [sdb] tag#19 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
color:#40464D">2020-04-29 02:18:53 +01:00 <6> [46169.841785] sd 3:0:0:0: [sdb] tag#19 Sense Key : Medium Error [current]
color:#40464D">2020-04-29 02:18:53 +01:00 <6> [46169.848488] sd 3:0:0:0: [sdb] tag#19 Add. Sense: Unrecovered read error - auto reallocate failed

Before I go and spend a few hundred replacing it, is there anything I can do if I take it out to verify this and see if it is fixable? Any good software programs around that I can get to investigate this further.

It is a WD red pro NAS drive and when in my NAS it passes all SMART tests and the NAS strangely doesn't pick up any faults with the drive, it is only when looking through the logs that the errors are noticed.

Long term it will need replacing, but short term Im hoping I can avoid spending money unless I have to..

 

[cyber69]

You could temporarily remove it from your NAS by powering it down and then taking out the drive and putting in a USB enclosure and testing it connected to your PC. Use WD Diags full surface scan as that what usually picks up issues on my Red’s in the Synology unit I have. If it has bad sectors then it will probably need replacing and if the drive is out of warranty you could do like what I have just done and run a program called Victoria to remap the bad sectors and then use the drive in JBOD.

 

[edgedemon]

You could temporarily remove it from your NAS by powering it down and then taking out the drive and putting in a USB enclosure and testing it connected to your PC. Use WD Diags full surface scan as that what usually picks up issues on my Red’s in the Synology unit I have. If it has bad sectors then it will probably need replacing and if the drive is out of warranty you could do like what I have just done and run a program called Victoria to remap the bad sectors and then use the drive in JBOD.

Nice one, will look up that software and give it a go..