[Linux-PowerEdge] Missing Disk on SAS 6
s.schmidt at jacobs-university.de
Fri Nov 23 01:18:08 CST 2012
On Thursday, November 22, 2012 07:24:14 PM Kai Schaetzl wrote:
> I have a Dell 1950 with an SAS 6iR aka LSI1068 card. It reports a
> "missing" disk. What does this actually mean? It looks like this is
> not a failed disk, but rather some kind of "broken" RAID, although
> the card still reports a RAID.
> ioc0 vol_id 4 type IM, 2 phy, 464 GB, state DEGRADED, flags ENABLED
> ioc0 phy 0 scsi_id 5 ATA WDC WD5002ABYS-0 3B02, 465 GB, state
> ONLINE, flags NONE ioc0 phy 1 scsi_id 8 ATA WDC WD5002ABYS-0
> 3B02, 465 GB, state MISSING, flags OUT_OF_SYNC
> [0:0:1:0] disk ATA WDC WD5002ABYS-0 3B02 -
> /dev/sg1 WD-WCASY2302383 [0:0:4:0] disk ATA WDC
> WD5002ABYS-0 3B02 /dev/sdb /dev/sg0 WD-WMASY4642710 [0:1:4:0]
> disk Dell VIRTUAL DISK 1028 /dev/sda /dev/sg2
> on a system with failed disk it should show: (= no disk at all)
> [0:0:1:0] disk ATA WDC WD5002ABYS-0 3B02 - /dev/sg1
> WD-WCASY2302383 [0:1:4:0] disk Dell VIRTUAL DISK 1028
> /dev/sda /dev/sg2
> output of lshw shows indeed "correct data" and volumes for the second
> disk as if it was attached "unraided".
IIRC (i had this several times on a 2950 about 3-4 years ago) you have
to go to the controller BIOS and load "foreign" configuration of the
disks. Then the RAID is back together, with no data loss.
At any rate - be sure you have a current backup *now*, before you do
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