This disk performs a full data overwrite (that's the only reason why it would take almost three hours).On the other hand, if hdparm reports this: 168min for SECURITY ERASE UNIT. 2min for ENHANCED SECURITY ERASE UNIT.Ģ minutes are not enough to overwrite the whole disk, so if that disk implements some actual "secure erase", it must be with the encryption mechanism. Note that, similarly, if a spinning disk claims to implement both modes as well, it may very well map both commands to the same action (hopefully, the "enhanced" one).Īs described in this page, the hdparm -I /dev/sdX command will report something like this: Security:Ģmin for SECURITY ERASE UNIT. When a disk uses encryption, it will make no distinction between "secure erase" and "enhanced secure erase" it may implement both commands (at the ATA protocol level), but they will yield the same results. #What is the software seagate seatools code#In fact, when an SSD implements "secure erase", it MUST use the encryption mechanism, because the "overwrite with zeros" makes a lot less sense, given the behaviour of Flash cells and the heavy remapping / error correcting code layers used in SSDs. This strategy is applicable to both spinning disks and SSD.
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