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What about hardware-remapped bad blocks?

Posted Apr 1, 2004 13:42 UTC (Thu) by ed_avis (guest, #20596)
Parent article: Cleaning up your disks

When the disk firmware detects a block which is about to fail, it remaps it to some spare space. The bad block is then not accessible from software. So you could not erase it. Some data may be recoverable from a block marked as bad. I am talking about the disk firmware not anything done by the operating system.

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