HP ProLiant ML370 Generation 4 Reference And Troubleshooting Manual page 163

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If the drive is connected to a nonembedded controller, be sure the controller
is properly seated.
DLT drive does not read tape
Action:
•
Be sure the drive is seated.
•
Be sure the drive is installed properly.
•
Check each tape cartridge that has been used in the drive to see if a leader
was dropped. After you locate any bad cartridges, dispose of them. A
working tape drive will drop the leader of a bad cartridge, indicating that the
cartridge needs replacing.
•
Refer to the tape drive documentation to be sure the type of tape being used
is supported by the drive.
Server cannot find the DLT drive
Action:
•
Be sure a device conflict does not exist. Check for duplicate SCSI IDs in use
and refer to the documentation of the DLT drive and the array controller to
be sure they are compatible.
•
Be sure the maximum number of drives per controller has not been exceeded.
Refer to the controller documentation to determine the capacity of the
controller.
NOTE: It is recommended that no more than two DLT drives per bus
exist.
•
If using an external DLT drive that requires a SCSI terminator to be secured
to the unused SCSI IN connector on the back of the drive, be sure the SCSI
terminator is connected.
DLT drives can be daisy chained, but do not connect more than three units
per SCSI controller. The last DLT drive in the chain requires the SCSI
terminator.
•
Check cables for damaged or bent connectors.
Troubleshooting 163