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by patrickg_zill 3475 days ago
In the past, a utility did the determination and remapping via off-disk software.

My understanding was the traditional "bad block" behavior was actually hidden - there are bad blocks that occur but the firmware silently remaps everything.

When you see a bad block at the level you can see via e.g. smartctl program, that means the space set aside for bad block remapping is full - the drive has already been silently failing for a while now.