HP Surestore 80fx Optical Drive and Library SCSI-2 Command Reference - Page 44

SCSI-2 Drive Commands SCSI-2 Drive Command Set Numerical List of Commands Flag, Link, and RelAdr Many commands have bits named Flag, Link and RelAdr. The definitions of these bits are: A Link bit of 1 indicates that the drive links to the next command upon successful completion of the current command. When the command is terminated successfully, the drive returns the INTERMEDIATE/GOOD status and the LINKED COMMAND COMPLETE or the LINKED COMMAND COMPLETE (WITH FLAG) message depending on the state of the Flag bit. The Flag bit may be set to 1 only when the Link bit is 1. If this bit is set to 1 with the Link bit, the drive returns the LINKED COMMAND COMPLETE (WITH FLAG) message upon successful completion of the command. If this bit is set to 0, it returns the LINKED COMMAND COMPLETE message. The Relative Address (RelAdr) bit is set to 1 to indicate that the logical block address of the command descriptor block is a two's complement displacement. This negative or positive displacement is added to the logical block address last accessed on the drive to form the logical block address for this command. Chapter 2 2-7