Date: Mon, 16 Jun 2008 14:37:14 +0200 From: Zbigniew Szalbot <z.szalbot@lc-words.com> To: freebsd-questions@freebsd.org Subject: RAID 1 / disk error / Offline uncorrectable sectors Message-ID: <48565E7A.50807@lc-words.com>
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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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