HP Surestore 160ex Optical Drive and Library SCSI-2 Command Reference - Page 52
Format Unit Command (04H),
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SCSI-2 Drive Commands SCSI-2 Drive Command Set Format Unit Command (04H) Format Unit Command (04H) This command is used to initialize the optical disk surface. NOTE The format parameters may be set using the Mode Select Commands (15H or 55H) before executing the Format Unit Command. Table 2-10 Format Unit Command CDB Byte 7 6 5 4 3 0 Operation Code (04H) 1 Reserved (0) FmtDta CmpLst 2 Reserved (0) 3 Reserved (0) 4 Reserved (0) 5 Rsvd ErsCntl Reserved (0) 2 1 0 Defect List Format MkCDA MkPlst Flag Link NOTE The 9.1 and 5.2 Gbyte capacity drives cannot Format, Erase, Write, or Write and Verify 650 Mbyte and 1.3-Gbyte optical disks. The 2.6 Gbyte capacity drives cannot Format, Erase, Write, or Write and Verify 650 Mbyte optical disks. If this command is issued with any of these drive/media combinations, a CHECK CONDITION status will result with the Sense Key/Additional Sense Code set to Data Protect/Write Protected. FmtDta A Format Data bit of 1 indicates that the command includes a Data Out Phase consisting of a 4-byte Defect List Header. A FmtDta bit of 0 indicates that the command does not include a Data Out Phase. Chapter 2 2-15