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10 Pulsar XT.2 SAS Product Manual, Rev. B
When a region of LBA's are erased via cryptographic erase, as part of the erase, the drive shall unmap those
LBAs.
If the host attempts to access an unmapped or trimmed LBA, the drive shall return scrambled data. For a given
LBA, the data shall be identical from access to access, until that LBA is either updated with actual data from
the host or that LBA is cryptographically erased. The drive shall report a value of '0' in the LBPRZ field returned
in the READ CAPACITY (16) parameter data.
If the host attempts to access an unmapped LBA on a drive that has been formatted with Protection Informa-
tion (PI), the drive shall return scrambled PI data for that LBA. Depending on the value of the RDPROTECT
field in the data-access command CDB, this may result in the drive returning a standard PI error to the host.
If the host reduces the addressable capacity of the drive via a MODE SELECT command, the drive shall
unmap or trim any LBA within the inaccessible region of the device.
Additionally, an UNMAP command is not permitted on a locked band.
Table 3: PI and SED Drive Configuration
Drive Configuration
Standard SED
PI Setting Disabled Enabled Disabled Enabled
PROT_EN bit 010 1
LBPME bit 111 1
LBPRZ bit 110 0
PI Check Requested N/A Yes No N/A Yes No
DATA Returned for
Thin Provisioned LBA
0x00 0x00 0x00 Random None Random
PI Returned for
Thin Provisioned LBA
None 0xFF 0xFF None None
Scrambled
PI data
PI Check Performed N/A NoNoN/A YesNo
Error reported to Host No No No No Yes No