User's Manual

DLT4000 SCSI Interface
-8 DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem
8 3 SCSI Message System
purpose of physical path management.
To support certain SCSI-1 initiators, an Identify message is not required by the
should be an IDENTIFY, ABORT, or BUS DEVICE RESET message. If the
DLT4000 drive receives any other message in this case, it will go directly to BUS
The following messages are supported:
Table 8-1 Supported SCSI Messages
Code In/Out Description Section
06 Out ABORT ABORT (06h)
0D Out ABORT TAG ABORT TAG (0Dh)
0C Out BUS DEVICE RESET BUS DEVICE RESET (0Ch)
0E Out CLEAR QUEUE CLEAR QUEUE (0Eh)
00 In COMMAND
COMPLETE
COMMAND COMPLETE (00h)
04 In DISCONNECT DISCONNECT (04h)
01 Both EXTENDED MESSAGE
(SDTR only)
EXTENDED MESSAGE (01h)
80-FFh Both IDENTIFY IDENTIFY (80h-FFh)
05 Out INITIATOR DETECTED
ERROR
INITIATOR DETECTED ERROR
(05h)
0A In LINKED COMMAND
COMPLETE
LINKED COMMAND
COMPLETE (0Ah)
0B In LINKED COMMAND
COMPLETE w/flag
LINKED COMMAND
COMPLETE, with flag (0Bh)
09 Out MESSAGE PARITY
ERROR
MESSAGE PARITY ERROR (09h)
07 Both MESSAGE REJECT MESSAGE REJECT (07h)
08 Out NO-OP NO-OP ( NO OPERATION)(08h)
03 In RESTORE POINTERS RESTORE POINTERS (03h)
02 In SAVE DATA POINTER SAVE DATA POINTER (02h)