LOT2 SoftRAID 6 degraded (xfsdata)

predragp at andrew.cmu.edu predragp at andrew.cmu.edu
Thu Nov 20 23:43:50 EST 2014


Dear Autoninas,

During the routine checkup of computing node LOT2 tonight I found out that
SoftRAID 6 consisting of 5 HDD mounted as xfsdata is seriously degraded.
It appears that 2 out of 5 HDD which make up the RAID have died without
any warnings due to the old age. The good news is that only scratch
directory is affected and secondary back up of some very old databases. So
no real data loss will occur even if the RAID totally fails.
Please don't try to read or write data to /xfsdata aka. scratch.

Based upon my preliminary tests RAID appears to be salvageable. However I
don't have spare HDD for the RAID and based upon current available storage
space in the Lab one possibility is that we completely retire this RAID as
unnecessary.

Best,
Predrag



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