Installation guide

Converting a Single-System Conﬁguration to a DSSI VAXcluster Conﬁguration

C.2 Conversion Procedure

C.2.1 Split-Bus to Through-Bus Conversion

Use the following steps only if you are converting an SF7x storage enclosure

in position 3 or 8 of an DECarray from single-system to DSSI VAXcluster

conﬁguration. SF7x storage enclosures in position 3 and 8 must be converted

to through-bus mode.

CAUTION

Maintain ESD precautions at all times. Before performing the following

steps, locate the ESD strap in the ESD pouch at the bottom of the front

door.

To maintain stability, extend only one SF7x storage enclosure or

magazine tape ISE on the slide mounts at a time.

1. Remove the OCP by ﬁrmly grasping the right and left side of the OCP and

pulling the OCP straight off.

2. Loosen the four captive slide assembly screws. At the rear, push the inner

assembly out until the drawer locks in the service position.

Note

Do NOT completely remove the SF7x inner drawer assembly from the

extrusion tube.

3. Reconﬁgure the TTM for through-bus mode by ﬁrst moving the small black

jumper to the through-bus terminals. Then move the cable connector from

J3 to J5, and the cable connector from J2 to J4 (Figure C–2).

4. Push the SF7x inner assembly back into the extrusion tube. To prevent

pinching any cables, be sure that all cables are dressed correctly.

5. Tighten the four captive slide assembly screws.

6. Set the DSSI ID number switches behind the OCP front door of positions 3

and 8 to match those in positions 1, 2, 4, and 7 (Table C–1).

7. Replace the OCP by lining up the taps on the back of the OCP with the

slots on the front of the storage enclosure. Firmly press the right and left

side of the OCP.

C–6 Converting a Single-System Conﬁguration to a DSSI VAXcluster Conﬁguration