HP Surestore 80fx Optical Drive and Library SCSI-2 Command Reference - Page 175

NOTE NOTE SCSI-2 Drive Command Set Write and Verify (Group 5) Command (AEH) EBP Rel Adr Transfer Length PBA ErsCntl An Erase By-Pass bit of 0 indicates an erase automatically performs before writing the data. An EBP bit of 1 suppresses the erase operation. A relative address bit of one indicates that logical block address specified is a two's complement offset from the last logical block address accessed. A value of 0 indicates that the logical block address is an absolute address. The Transfer Length field indicates the number of contiguous logical blocks to be transferred for this command. A value of 0 indicates that no blocks will be transferred and is not considered an error. 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. The Erase Control bit is identical to the Erase Bypass bit. 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. For write-once optical disks, blank checking is performed before writing data. If a written block is detected during blank checking, the drive will return a CHECK CONDITION status. The sense key/additional sense code will be set to BLANK CHECK/Overwrite Attempted. 2-138 Chapter 2