2 ms·

Pretty sure people have discovered that is not reliable on some drives too, that it may only destroy the logical to physical map, and not change the actual data

by rdc12 7y ago

Pretty sure people have discovered that is not reliable on some drives too, that it may only destroy the logical to physical map, and not change the actual data cells. It is surprisingly difficult to ensure deliberate data loss

wtallis 7y ago
> Pretty sure people have discovered that is not reliable on some drives too, that it may only destroy the logical to physical map, and not change the actual data cells. This can be the case for something like an ATA Secure Erase command, which is why the Sanitize commands were introduced to ATA, SCSI and NVMe. Those do explicitly mandate that all user data be erased, including from all caches and any storage media that is not normally accessible to the host system (ie. old blocks that haven't been garbage collected yet).