Tandberg Data VXA-320 (VXA-3) - Manual (Page 57)

O CTOBER 2006 VXA-320 T APE D RIVE 43
SCSI I
NTERFACE
R
EQUIREMENTS
SCSI Terminator Requirements
If the internal tape drive is the last device on the SCSI bus, you must terminate
the bus by installing an pass-through LVD/SE terminator on the tape drive’s
SCSI connector. Or, if there is an unused connector at the end of the SCSI
cable, you can terminate the bus there. If the cable provided with your adapter
has a built-in terminator, do not add another terminator to the bus.
Note: If you will be installing the tape drive in an enclosure and using an external
terminator, you must install a high-quality active LVD terminator that
complies with the SCSI-3 specification.
E
XTERNAL
T
APE
D
RIVE
This section describes the cable, connector, and terminator requirements for
the external LVD SCSI tape drive.
SCSI Cable Requirements
For the external tape drive, select a cable that complies with the SCSI-3
specification and meets the requirements listed in Table 6-5 .
SCSI Terminator Requirements
If the external tape drive is the last device on the SCSI bus, you must terminate
the bus by installing a high-quality active LVD/SE terminator that complies
with the SCSI-3 specification on one of the tape drive’s SCSI connectors.
Table 6-5 SCSI cable requirements
Specification Requirement
Connector type 68-pin male, high-density, shielded, SCSI-3 compliant
Maximum length
a
a The maximum length of 12 meters only applies to an LVD SCSI bus. If a single-ended device is connected
anywhere on the bus, all devices on the bus operate in single-ended mode. When operating in
single-ended mode, the maximum allowable bus length is 3 meters (9.8 feet), terminator to terminator.
Exceeding the maximum cable length will result in unstable and unpredictable operation.
12 meters (39 feet)
b
b If only two devices are attached to an LVD bus in a point-to-point configuration, the maximum allowable
cable length is 25 meters (82 feet).