HP Surestore 80fx Optical Drive and Library SCSI-2 Command Reference - Page 126

SCSI-2 Drive Commands NOTE NOTE SCSI-2 Drive Command Set Erase (Group 1) Command (2CH) ERA Rel Adr Transfer Length PBA An Erase All bit of 1 indicates that all remaining blocks are erased, starting from the logical block address to the end of the disk. The transfer length must be set to 0. An ERA bit of 0 indicates that all blocks are erased, starting from the logical block address to the end of the specified transfer length. 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 specifies the number of contiguous logical blocks of data to be erased. A value of 0 indicates that no blocks will be erased 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. If this command is executed for write-once disks, the drive returns a CHECK CONDITION status with the Sense Key/Additional Sense Code set to Illegal Request/Invalid Command Operation Code. When this command is executed with 14X 512 or 1024 byte/sector media, the drive will return a CHECK CONDITION status. The sense key/ additional sense code will be set to ILLEGAL REQUEST/INVALID COMMAND. Chapter 2 2-89