External Drives; Scsi Termination In Internal Drives - Freecom USB DAT-72I User Manual

Figure 27 SCSI termination in internal drives
As long as this terminator is attached, you do not need to take any further action. However, if you have
other devices attached to the cable, make sure that they have termination removed or disabled.
NOTE:
If you have an internal and external device attached to the same SCSI bus, the HBA will be in the middle
of the cable and thus its termination must be disabled. See the host bus adapter's documentation
for details of how to do this.

External drives

All HP StorageWorks DAT external tape drives are supplied with the appropriate cable and LVD
terminators.
Make sure the terminator is firmly attached to the SCSI-OUT connector on the rear of the device when you
install it. Always use the supplied LVD terminator for proper operation.
66
SCSI configuration guide