In my last installment I covered two of the three reasons why we do a parity check. First we want to make sure that we do not have a stale hard drive in the array. Although I did not cover how one determines if in fact a stale hard drive exists, I will mention it now. […]
Analyzing RAID parity
Last time I discussed how to find the RAID data offset for a SNAP OS 4.x RAID handler. To put it briefly it was just a simple matter of finding Cylinder Group zero on the first drive in the array and back tracking 48 sectors. Once the RAID data offset is established we can plug […]
Check Your RAID Consistency Before A Rebuild
Over the years one of the most consistent problems with RAID recovery is the rebuild. I would estimate that nearly 40 percent of the RAIDs that we cannot recover are due exclusively to the fact that a technician executed a rebuild before verifying the following three items. 1. Hardware: The RAID went down for some […]
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