HP Surestore 28/48-Slot with DLT7000 Digital Linear Tape SCSI-2 Drive and SCSI - Page 37

SCSI Command Overview Library Control Commands Bus Device Reset 0CH, This message from the initiator clears all commands, data, and status in the tape controller. When it recognizes this message, the drive aborts the current command and proceeds to the BUS FREE state. The drive then executes a hard reset as if a Bus Reset had occurred. All data in the write buffer is lost. Identify 80H-FFH, The initiator or target sends this message to establish the physical path connection between them for a logical unit. When the Identify message is sent from a target to an initiator during reconnection, a RESTORE POINTERS message is implied. • Bit 7: This bit is always set to 0. • Bit 6: This bit is set by the initiator if the target can disconnect/reconnect. • Bit 5: This bit must be set to zero ("Target Routines" not supported). • Bit 4: Reserved. • Bit 3-0: These bits specify a logical unit number. (Only one logical unit number is identified for a selection sequence). Status Phase The target sends a status byte to the initiator during the Status Phase, which occurs at the end of each command, unless the command is cleared by ABORT, BUS DEVICE RESET, or a HARDWARE RESET signal. The target supports the following status codes. Chapter 1 1- 13