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You are spot on with everything, especially RAID controllers. I used to help manage a large fleet of database servers. We found that blocks could "rot" on the
by ericbarrett 4y ago
You are spot on with everything, especially RAID controllers.
I used to help manage a large fleet of database servers. We found that blocks could "rot" on the underlying storage, yet if they were read often enough they would be held in memory for months and never re-read from the underlying drive. Until you rebooted!
- water8 4y agoYes bitrot is a huge problem with mechanical hard drives and media that hasn’t been read in a long time. What you write to the drive might not be what you read back five years later. That’s why ZFS is critical for systems like this where you have checksums for each block of data and can rebuild from parity if there is a mismatch