HP Surestore 330fx Optical Drive and Library SCSI-2 Command Reference - Page 124
Seek (Group 1) Command (2BH),
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SCSI-2 Drive Commands SCSI-2 Drive Command Set Seek (Group 1) Command (2BH) Table 2-77 NOTE Seek (Group 1) Command (2BH) This command seeks the optical head to the physical track where the specified logical block exists. Seek (Group 1) Command CDB Byte 7 6 5 4 3 2 1 0 0 Operation Code (2BH) 1 Logical Unit Number (0) Reserved (0) 2 Logical Block Address (MSByte) 3 Logical Block Address 4 Logical Block Address 5 Logical Block Address (LSByte) 6 Reserved (0) 7 Reserved (0) 8 Reserved (0) 9 PBA Reserved (0) Flag Link PBA A Physical Block Address bit of 1 indicates that physical block addressing is used. A PBA bit of 0 indicates that logical block addressing is used. When this command is used with 512 byte/sector 14X media or 1024 byte/ sector 14X media, setting the PBA bit will cause the drive to return a CHECK CONDITION status. The sense key/additional sense code will be set to ILLEGAL REQUEST/Invalid Field in CDB. Chapter 2 2-87