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Linux RAID-5 Crash Recovery | |
"Linux RAID-5 Crash Recovery at CFHT Contents UP to LinuxPC page Single Disk Failures Multiple Disk Failures I. Single Disk Failures, Software RAID Warn the appropriate users that you are about to put a lot of stress on their RAID disk and give them the chance to manually copy off critical data before starting reconstruction.. Once the user no longer needs the machine, go into "reconfig" and select "CFHT Maintenance" below the profile, if available. This disables most logins, nfsd, and moves SSH to port 2267.. Check the failed drive's SMART status to see if it really is going bad: . # smartctl -cv /dev/hdx Look for "more than a few" raw counts (last column) of "Reallocated Sectors", and/or "Reallocated Events", or anything else unusual that would indicate the drive really is failing. If the drive looks OK, or you are able to determine that the RAID system ended up removing the drive because of a controller problem or something other than bad media, then skip to step 6.. If the drive is SCSI, or an IDE slave, disconnect the power connector from the drive, reb"
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