M2488 PRODUCT GUIDE SCSI MESSAGES
April 1997 CG00000-011503 REV. A 3-1
CHAPTER 3
SCSI MESSAGES
3-1 INTRODUCTION
Chapters 3 through 6 are the Host Interface Specification for the M2488.
This chapter describes the messages for the M2488 tape drive and the medium changers. The following
information is located in this chapter:
3-2 M2488 TAPE AND MEDIUM CHANGER SCSI MESSAGES
3-3 SCSI BUS STATUS
3-2 M2488 TAPE AND MEDIUM CHANGER SCSI MESSAGES
Table 3-1 describes the SCSI messages used with the M2488. For more detailed information on the
SCSI message, refer to the paragraph listed in the PARAGRAPH column.
Table 3-1. M2488 SCSI Messages
CODE MESSAGE DESCRIPTION PARAGRAPH
00h COMMAND COMPLETE
Indicates the execution of a command has termi-
nated and valid status was sent to the initiator.
3-2.3 on page 3-2
01h EXTENDED MESSAGE Sent as the first byte of a multiple-byte message. 3-2.5 on page 3-3
02h SAVE DATA POINTER
Directs the initiator to save a copy of the present
active data pointer for the currently attached log-
ical unit.
3-2.15 on page 3-9
03h RESTORE POINTERS
Restores the most recently saved pointers (for the
currently attached logical unit) to the active state.
3-2.14 on page 3-9
04h DISCONNECT
Informs the initiator that the present physical
path is going to be broken.
3-2.4 on page 3-2
05h INITIATOR DETECTED ERROR Informs a target an error has occurred. 3-2.8 on page 3-8
06h ABORT Sent to the target to clear the present operation. 3-2.1 on page 3-2
07h MESSAGE REJECT
Indicates the last message received was inappro-
priate or was not implemented.
3-2.12 on page 3-8
08h NO OPERATION
Sent in response to a target’s request for a mes-
sage when the initiator does not currently have
any other valid message to send.
3-2.13 on page 3-9
09h MESSAGE PARITY ERROR
Indicates one or more bytes in the last message,
received by the initiator, had a parity error.
3-2.11 on page 3-8
0Ah
LINKED COMMAND COM-
PLETE
Indicates to the initiator that the completion and
execution of a linked command and status was
sent.
3-2.9 on page 3-8
0Bh
LINKED COMMAND COM-
PLETE (with flag)
Indicates to the initiator that the completion and
execution of a linked command with the flag bit
set to 1 and status was sent.
3-2.10 on page 3-8
