Exabyte 221L, Product Manual, Page: 27 / 208

A
UGUST
2005 E
XABYTE
221L
AND
221L-FC L
IBRARIES 11
O
BTAINING
A
CCESSORIES AND
E
QUIPMENT
O
BTAINING
A
CCESSORIES AND
E
QUIPMENT
Make sure that you have all the accessories and equipment for library
installation and operation, as indicated in Table 2-1 . Many of these items are
included in the library accessory box. If necessary, you can purchase items
from Exabyte (see page iv ).
Table 2-1 Accessories and equipment for installation and operation
Accessories and Equipment
Power Cord Two power cords are provided with the library: one for use in the US and Canada
and one for use in Europe. If you plan to use the library outside of these locations,
refer to page 173 for power cord requirements.
SCSI Cables
(221L) Two SCSI cables are provided with the library: one for connecting a host computer
to the library, and one for connecting the library to a tape drive.
You will need one or more additional cables if you plan to install a second tape
drive in the library or if you plan to attach multiple SCSI buses to the library.
You can purchase SCSI cables from Exabyte or provide your own. If you want to
use your own cables, follow these guidelines:
ƒ
Use wide LVD SCSI cables that conform to SCSI-3 specifications. To comply
with the regulations and standards listed in Appendix A , all SCSI cables used
with the library must be properly shielded.
ƒ
The maximum allowable length of an LVD SCSI bus is 12 meters (39 feet) if you
have more than two devices on the bus. To determine the bus length:
a. a. a. a. Add together the lengths of all external SCSI cables on the bus.
b. b. b. b. Add 23 centimeters (9 inches) for the internal cable length used by each
tape drive on the bus and 5 centimeters (2 inches) for the internal cable
length used by the robot.
c. c. c. c. Add the internal cable lengths for any other SCSI devices on the bus.
SCSI Bus
Terminator(s)
(221L)
One SCSI terminator is provided with the library.
You may need additional terminators if you have more than one SCSI bus attached
to the library.
You can purchase terminators from Exabyte or provide your own. If you want to
use your own terminators, use active terminators such as the AMP 796051-1
(SE/LVD Multi-mode) SCSI terminator. Termination must be external; do not use
internal terminators.
Fibre Channel Cables
(221L-FC) No Fibre Channel cables are included with the library. The number of optical fiber
cables required for attaching the library to a Fibre Channel network depends on
how many tape drives are installed.
You can purchase optical fiber cables from Exabyte or provide your own. Use
either 50-micron or 62.5-micron multi-mode optical fiber cables with dual
single-channel (LC) connectors. If you choose 50-micron multi-mode optical fiber
cables, they must comply with the 100-M5-SN-I classification as specified in the
Fibre Channel standard (FC-PI). If you choose 62.5-micron multi-mode optical
fiber cables, they must meet the 100-M6-SN-I classification.
Note: The length of 62.5 micron multi-mode cables should not exceed 275
meters. Operation over distances greater than 275 meters cannot be guaranteed.