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SCSI Channel MAP 53
6-00020-02
SNC 5100
Check SCSI Bus Termination
Caution
If in this procedure you determine that you need to remove a SCSI
cable or terminator, all I/O to the SNC 5100 must be stopped and
the SNC 5100 must be turned off.
Step 1. Verify the termination for the end device attached to the channel in
question.
The last physical device on a chain of SCSI devices needs to be
terminated.
If the end device has internal termination, be sure it is enabled.
Otherwise check that an external terminator is attached to the
device.
A Differential (DE) terminator on a Single Ended (SE) bus or an SE
terminator on a DE bus will cause the bus to be unusable.
Step 2. Verify the termination for the other devices attached to the channel
in question.
Check that all SCSI devices other than the end devices have internal
termination disabled.
A Differential (DE) terminator on a Single Ended (SE) bus or an SE
terminator on a DE bus will cause the bus to be unusable.
Step 3. If there are SCSI termination problems, power down the SNC 5100
down and correct them.
If you corrected SCSI termination problems, go to "SCSI Health
Check".
If SCSI termination is OK, go to "Check for Multiple SCSI IDs".
Step 4. If you powered down the SNC 5100 down, turn it back on.