Seagate ST200FM0002 Pulsar.2 SAS Product Manual - Page 18

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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 Information (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 PI Setting PROT_EN bit LBPME bit LBPRZ bit PI Check Requested DATA Returned for Thin Provisioned LBA PI Returned for Thin Provisioned LBA PI Check Performed Error reported to Host N/A 0x00 None N/A No Disabled 0 1 1 Yes 0x00 0xFF No No Enabled 1 1 1 No 0x00 0xFF No No N/A Random None N/A No Disabled 0 1 0 Yes None None Yes Yes SED Enabled 1 1 0 No Random Scrambled PI data No No 10 Pulsar.2 SAS Product Manual, Rev. B

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10
Pulsar.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
0
1
0
1
LBPME bit
1
1
1
1
LBPRZ bit
1
1
0
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
No
No
N/A
Yes
No
Error reported to Host
No
No
No
No
Yes
No