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NIIBE Yutaka's glog, Eight disks, three pegs, and just a little hack.
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2005-06-19 (Sun)
RAID5
I have got failure for the recovery of RAID5 system for SHANPSHOT.DEBIAN.NET.
Last year, we constructed (software) RAID5 system with raidtools2. We connected eight IDE disks by USB2.0. Because of USB, the recognition of disks changes, for example, a disk sometimes recognize as /dev/sde, sometimes as /dev/sdh.
But it works as RAID, /dev/md5.
Last week, we found that /dev/sdh got sector error. I replaced that disk, and expected reconstruction automatically goes. But it seemed that at the construction time, the configuration was that the broken disk was recognized as /dev/sde, not /dev/sdh.
It seemed that the good disk was overridden as bad.
Now, raidtools2 was replaced with mdadm, I should have learned the recovery procedure.
