
6.2 Cabling the Subsystem in Sx300 Storage Array Position
drive dc power switches to the out position. Lastly, turn off the ac power at
the rear of the storage enclosure.
CAUTION
Use care not to disturb or damage power cords and DSSI cables that
are already connected to the DSSI I/O panel.
2. Disconnect the 70-inch DSSI cable (part number BC21R–5L) connected to
the rightmost DSSI connector at the rear of the SF2.
3. Install this 70-inch DSSI cable to the top DSSI connector on the rear of the
magazine tape subsystem.
4. Route this DSSI cable on the right side of the cabinet.
5. At this time, connect a 42-inch DSSI cable (part number BC21Q–3F) to the
rightmost DSSI connector at the rear of the SF2 and to the bottom DSSI
connector at the rear of the magazine tape subsystem in TF2.
6. Route this DSSI cable on the appropriate side of the cabinet.
7. If no SF72 storage enclosure is installed SF2, then at the rear of the Sx300
storage array, locate the DSSI I/O panel at the bottom.
8. Swing open the panel from the cabinet frame.
9. Install a 70-inch DSSI cable (part number BC21R–5L).
10. Connect the other end of this cable into the top DSSI connector at the rear
of the magazine tape subsystem. See Figure 6–8.
11. Route this DSSI cable on the left side of the cabinet.
12. Connect a 108-inch DSSI cable (part number BC21Q–09) into the port you
just installed in the previous steps. Tighten the retainer screws with your
fingers.
13. Plug the other end of this cable into the appropriate port on the system
I/O panel at the rear of the system cabinet. To determine which of the two
DSSI connectors on the system I/O panel to connect to:
a. Open the system I/O panel by removing the six screws that secure the
I/O panel to the system chassis. Let the panel swing down to its rest
position.
6–16 Installing the Magazine Tape Subsystem in an Sx300 Storage Array
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