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> RAID won't save you from bit rot Sure it can. You use mdadm to schedule a monthly full scan of the RAID array, comparing both disks. It's the default in Debi
by ars 6y ago
> RAID won't save you from bit rot
Sure it can. You use mdadm to schedule a monthly full scan of the RAID array, comparing both disks. It's the default in Debian.
You should also use smartmontools to schedule weekly long self tests of the disk, and nightly short self tests. That way you find out about problems when they are still small.
- mceachen 6y agoI'm sorry, I should have clarified: as far as I know, mdadm on RAID1 with consumer-grade spinning rust will not be able to save you from bit rot (or at least I haven't seen evidence to that effect). I haven't tried on RAID6 (where there's at least a chance due to the data duplication such that the flipped bit will be "out-voted" by the parity spindles).