The unused ends of the SAS fanout cable are single channel and not suitable for use with disk arrays. Use
the other ends to connect additional tape drives, or coil and secure them to the rack to minimize stress on
the connectors.
TIP:
Mini-SAS connectors are keyed. Do not force a mini-SAS connector into the tape drive SAS port
because the connector and port might be keyed differently.
NOTE:
Each tape drive uses one channel. The cable recommended for use with the library maps each of the four
channels from the HBA to one channel on the drive end.
You can plug any of the four drive connectors into any tape drive.
Connecting the parallel SCSI cable
NOTE:
LTO-3 and LTO-4 tape drives are Ultra 320 SCSI LVD devices. Use only cables and terminators specified for
Ultra 320 or labeled as MultiMode. LTO-2 tape drives are Ultra 160 SCSI LVD/SE devices; use only cables
and terminators specified for Ultra 160 or Ultra 320, or labeled as MultiMode.
NOTE:
For optimal performance, do not place any other devices on the same bus as a parallel SCSI tape drive.
Procedure
1.
Power off the host server before attaching new devices.
2.
Attach one end of the parallel SCSI cable to one of the connectors on the back panel of the tape drive.
3.
Attach the other end of the parallel SCSI cable to the connector on the parallel SCSI host bus adapter or to
the connector on the previous device on the parallel SCSI bus.
NOTE:
For best performance, use a Low Voltage Differential Signaling (LVDS) HBA. A Single-Ended (SE) SCSI
host bus adapter works, but severely degrades performance and limits cable length. If any SE devices are
on the same parallel SCSI bus, all of the devices on the parallel SCSI bus slow to SE speed, which
severely degrades performance. Never attach an LTO-3 or LTO-4 tape drive to an SE SCSI bus.
4.
Attach the terminator to the remaining parallel SCSI connector on the back panel of the tape drive if the
library is the last or only device on the parallel SCSI bus. Otherwise, attach one end of a parallel SCSI
Connecting the parallel SCSI cable
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