When running the command
hdparm -I /dev/sda the following output is generated.
ATA device, with non-removable media Model Number: WDC WD10JPVX-75JC3T0 Serial Number: WX51A9324970 Firmware Revision: 01.01A01 Transport: Serial, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0 Standards: Supported: 9 8 7 6 5 Likely used: 9 Configuration: Logical max current cylinders 16383 16383 heads 16 16 sectors/track 63 63 -- CHS current addressable sectors: 16514064 LBA user addressable sectors: 268435455 LBA48 user addressable sectors: 1953525168 Logical Sector size: 512 bytes Physical Sector size: 4096 bytes Logical Sector-0 offset: 0 bytes device size with M = 1024*1024: 953869 MBytes device size with M = 1000*1000: 1000204 MBytes (1000 GB) cache/buffer size = 8192 KBytes **Nominal Media Rotation Rate: 5400**
Of interest is the description and value
Nominal Media Rotation Rate: 5400. This indicates that the hard drive is mechanical and not flash.
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.
Security: Master password revision code = 65534 supported not enabled not locked not frozen not expired: security count supported: enhanced erase 198min for SECURITY ERASE UNIT. 198min for ENHANCED SECURITY ERASE UNIT.
Given that the device is not a solid state drive, should a secure ATA erase still be performed?
If no, why? If yes, why?
shred --verbose --random-source=/dev/urandom -n1 /dev/sda support the same or a similar outcome i.e. irrecoverable data including defective or deallocated sectors?