Mark's TO-DO list for hdparm:
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- Add "wipe-drive" functionality via SCT WRITE_SAME (or manual).

- Add "surface-scan" functionality via SG READ_VERIFY.

- Add --automatically-find-and-fix-media-errors

- Add utility to recover data from a drive with bad sectors.

- Use SCSI Inquiry for -I on ATAPI, especially with libata.

- Use read()/write() for non-ATA drives with --{read,write}-sectors