![]() ![]() Whether or not you use the firmware's secure erasure or erase the block device is something that is up to you. It takes a lot longer than on SSDs because hard drives are less likely to support SED, which allows instant erasure by destroying an encryption key. It is not meant only for solid state drives and works fine on spinning rust. If you want to erase the data, you can use ATA Secure Erase. irrecoverable data including defective or deallocated sectors? Would shred -verbose -random-source=/dev/urandom -n1 /dev/sda support the same or a similar outcome i.e. Given that the device is not a solid state drive, should a secure ATA erase still be performed? There is support for ATA secure erase as suggested by the output albeit I would have not anticipated a secure erase taking as long as 198 mins. This indicates that the hard drive is mechanical and not flash. Of interest is the description and value Nominal Media Rotation Rate: 5400. Transport: Serial, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0ĬHS current addressable sectors: 16514064 ![]() When running the command hdparm -I /dev/sda the following output is generated. ![]()
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