HP Surestore 80ex Optical Drive and Library SCSI-2 Command Reference - Page 129
Verify (Group 1) Command (2FH),
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SCSI-2 Drive Command Set Verify (Group 1) Command (2FH) Table 2-80 Verify (Group 1) Command (2FH) This command verifies previously written data integrity starting at the specified Logical Block Address by reading the data and checking the Error Correction Code. The verification threshold is set to approximately half of the error correction capability. Verify (Group 1) Command CDB Byte 0 1 2 3 4 5 6 7 8 9 7 6 5 4 3 2 1 0 Operation Code (2FH) Logical Unit Number (0) DPO Rsvd Blk Rsvd RelAdr (0) Vfy (0) Logical Block Address (MSByte) Logical Block Address Logical Block Address Logical Block Address (LSByte) Reserved (0) Verification Length (MSByte) Verification Length (LSByte) Reserved (0) Flag Link DPO A Disable Page Out (DPO) bit of 1 instructs the target not to retain the data in the cache after it has been verified. A DPO bit of 0 instructs the target to retain the data in the cache after it has been verified. This bit is ignored. 2-92 Chapter 2