Hello,
I'd like to ask your advice. We have RAID 1 / SATA turned on in BIOS.
A couple of days ago smartd let me know about a disk problem.
Jun 14 01:13:38 relay kernel: ad12: FAILURE - READ_DMA48
status=51<READY,DSC,ERROR> error=40<UNCORRECTABLE> LBA=374468863
Jun 14 01:13:38 relay kernel: ar0: WARNING - mirror protection lost.
RAID1 array in DEGRADED mode
Jun 14 01:14:19 relay kernel: ad12: WARNING - WRITE_DMA taskqueue
timeout - completing request directly
Jun 14 01:14:19 relay kernel: ad12: WARNING - WRITE_DMA48 freeing
taskqueue zombie request
Jun 14 01:37:38 relay smartd[683]: Device: /dev/ad12, 1 Currently
unreadable (pending) sectors
Jun 14 01:37:38 relay smartd[683]: Device: /dev/ad12, 1 Offline
uncorrectable sectors
If I do smarctl -a /dev/ad12 I get
197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always
- 1
198 Offline_Uncorrectable 0x0010 100 100 000 Old_age
Offline - 1
My understanding is that RAID 1 no longer works because of this error.
There is a bad sector on HD (Offline uncorrectable sectors) and the best
we can do is replace the drive? Does it make sense to try to turn RAID 1
on ignoring this error (however, this is done in BIOS so the machine
would have to be taken down in order to do that)? It seems serious
enough for me not to ignore it but then I know close to nothing about HDs.
Many thanks for your suggestions!
Zbigniew Szalbot
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