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Viper 200 LTO Product Manual
SCSI interface
Introduction
This chapter summarizes the SCSI message codes, status codes and commands
used by the drive. Refer to chapter 3 for SCSI cabling and connection information.
Please refer to the L
TO Tape Drive SCSI Interface Manual
(part number 100109647)
for detailed developer information relative to SCSI implementation.
Viper 200 drives feature a multi-mode LVD and single-ended SCSI-2 interface. The
drive’s SCSI-2 interface allows for communication between the host computer and
the tape drive. The Viper SCSI-2 interface conforms to requirements outlined in ANSI
X3.131, 1994. The drive also supports some SCSI-3 command extensions.
SCSI-2 interface
The SCSI-2 interface for the Viper 200 drive conforms with the ANSI X3.131 1994
standard. The following three tables list the message codes, status codes and
commands for this interface.
SCSI message codes
Code
Description
Direction
1
00h
Command Complete
In
02h
Save Data Pointer
In
04h
Disconnect
In
05h
Initiator Detected Error
Out
06h
Abort
Out
07h
Message Reject
In/Out
08h
No Operation
Out
0Ch
Bus Device Reset
Out
80h
Identify (No Disconnect/Reconnect)
In/Out
C0h
Identify (Disconnect/Reconnect)
In/Out
01h
2
Extended Message
In/Out
03h
Wide Data Transfer Request
In/Out
1.
Direction is defined as follows: In = Drive to Host; Out = Host to Drive
2.
The Viper 200 drive supports only one Extended Message: Synchronous
Data Transfer Request
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