beware of UREs.
The real danger with mdadm raid 5 arrays is tripping on an unrecoverable read error rate (URE) on a second drive while trying to re-silver the array. I've come across posts that made me worry: http://www.zdnet.com/blog/storage/wh...ng-in-2009/162 .
People suggest backing up the data (if not having done so already) BEFORE replacing the failed drive to avoid danger of hitting an URE. For arrays near or over 12TB the danger is real.
I've got a 4x2TB raid 5 ext4 array and I've successfully replaced 2 bad drives over a period of time, but I'm looking forward to replacing it with btrfs when its raid 5 and btrfs-tools become mature enough.
I hope you enjoy your large array, but please make sure you take regular backups.
Originally posted by Brane215
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People suggest backing up the data (if not having done so already) BEFORE replacing the failed drive to avoid danger of hitting an URE. For arrays near or over 12TB the danger is real.
I've got a 4x2TB raid 5 ext4 array and I've successfully replaced 2 bad drives over a period of time, but I'm looking forward to replacing it with btrfs when its raid 5 and btrfs-tools become mature enough.
I hope you enjoy your large array, but please make sure you take regular backups.
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