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For SATA SSD, I know that there exists an open source program named hdparm for secure erase by issuing ATA command and this tool has been embedded within linux operating system. For SAS SSD, I want to know whether there is a similar tool that can be used for secure erase for all kinds of SAS SSD. Thank you in advance.

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It varies by vendor, but mostly the sg_format tool (as found in the sg3_utils package) will suffice.

Sandisk states in their support system:

All SanDisk Lightning SSDs are SAS and support the SCSI format unit command which will securely erase all user data.

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