Installing the Drive
12
014–002139
Table 4 Setting the Drive Jumpers for Model 6799
CNH7 Jumpers
No.
Position
SCSI ID Numbers
1-2
Out
In
Out
In
Out
In
Out
In
3-4
Out
Out
In
In
Out
Out
In
In
5-6
Out
Out
Out
Out
In
In
In
In
Description
7-8
In
Enable write operation mode
Out
Disable write operation mode
9-10
Out
Reserved
CNH3 Jumpers
No.
Position
Description
1-2
In
Reserved for factory testing
CNH2 Jumpers
No.
Position
Description
1-2
Out
Reserved for factory testing
3-4
Out
Reserved for factory testing
CNH1 Jumpers
No.
Position
Description
1-2
In
Set PER (post error) default value to 0
Out
Set PER (post error) default value to 1
3-4
In
Set SCSI mode to SCSI-1/CCS
Out
Set SCSI mode to SCSI-2
5-6
In
Enable diagnostics mode
Out
Disable diagnostics mode
7-8
In
Enable UNIT ATTENTION report mode
Out
Disable UNIT ATTENTION report mode
9-10
In
Set reselection retry count to unlimited
Out
Set reselection retry count to 10
11-12
In
Reserved
Out
13-14
In
Enable SCSI bus parity
Out
Disable SCSI bus parity
15-16
In
Enable synchronous mode transfer request from TARG
(target)
Out
Disable synchronous mode transfer request from TARG
(target)
17-18
In
Enable LED during operation
Out
Disable LED during operation
19-20
In
Enable motor start at power on
Out
Enable motor start only with START/STOP command
21-22
In
Supply SCSI terminating power
Out
Do not supply SCSI terminating power
=
Factory default jumper positions. Always read your computer setup, installation,
or maintenance manual. This manual will tell you what SCSI ID number you need
to set and it may require you to change one or more of the other jumpers.
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