HP NonStop G-Series - Manual (Page 35)

Installing the Tape Library
L700 (CTL700) Installation and User’s Guide — 527338-004
3 -7
Installing Cables
Installing Cables
This section explains how to connect the following cables:
•
Client-direct 1 tape library SCSI control cables
•
Client SCSI data cables
•
Ethernet cable
•
Fiber cables
SCSI Cable Paths
You have the option of separating the SCSI control and data paths. The control
path transfers client commands for the tape library move operations only. The
data path transfers data to and from the tape drives.
You can combine the data and control paths into one, single path. But consider
performance when you determine the number of tape drives per SCSI path.
The SCSI control and data path cables must be 68-pin high density (HD)
connectors at the tape library. You can use single-ended cables, but their
connectors must be adapted to a 68-pin differential configuration at the tape
library connection. Because a variety of system cables are available, the
connector might need to be adapted to fit the tape library.
Refer to “ Appendix B, Multimode Fiber-Optic Cables ” for the SCSI cable part
numbers.
SCSI Control Connection
Length requirements for the SCSI control connections depend on the position of
the server in relation to the tape library.
Tape library control cables from the client or server connect to the MPC card
through the two connectors at the front right bulkhead. These two connectors
join into one connector at the MPC card. One bulkhead connector is for the
SCSI in signals, and the other is for the SCSI “out” signals.
These instructions pertain to connections in general. For connection to a Sun
SPARC5, refer to the next subsection.
Note. If the cables are going under a raised floor, the floor tile under the tape library must have
cutouts to allow routing of these cables.