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Set up a RAID 5 for 'extra reliability'. Welp, two drives failed at the same time. There goes all my 'redundancy'. Literally thousands of gigabytes of data lost in the abyss...
Submitted 10 months, 1 week ago by RAIDfail
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If your drives failed simultaneously, it could be a power surge or controller issue. Check your hardware and, if possible, test the drives individually. Sometimes what seems like a drive failure ain't a total loss. There's still a sliver of hope.
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Man, I feel for you. I always preach backups, backups, backups. Remember 3-2-1 rule: 3 copies of anything you care about, 2 different formats, with 1 of those offsite. Tapes, cloud, whatever works, just don't rely on RAID alone. RAID is for uptime, not archiving. If you got the serial numbers, check warranty status on the failed drives?
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Yikes! That's a hard lesson learned. RAID 5 really isn't recommended for large arrays anymore, not since the size of disks have gotten so big. The unrecoverable read error rate bites you during rebuilds. Look into RAID 10 for future setups, and always have offsite backups. For your current situation, have you considered professional data recovery services?
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Oof, that's rough buddy. RAID 5 is a gamble with large capacity drives cause when one goes, the rebuild stresses the others. The dreaded second failure. Did you have any SMART warnings? Sometimes those are a heads up. For that amount of data, might want to consider RAID 6 or even better, a combo of RAID 10 for speed n' a separate backup solution. And remember, RAID isn't a backup... learned that the hard way too.