Installation guide

C–6 Converting a Single-Host Conﬁguration to a Dual-Host Conﬁguration

C.2.1 Split-Bus to Through-Bus Conversion Procedure

Use the steps in this section only if you are converting an SF72 storage

enclosure resident in position 3 or 8 of an SF200 storage array from

single-host to dual-host. SF72 storage enclosures in position 3 and 8

MUST be converted as split-bus mode is NOT supported in the dual-host

conﬁguration.

CAUTION

Maintain ESD precautions at all times. Before performing any of

the following steps locate the ESD strap located in the ESD pouch

at the bottom of the front door.

To maintain stability, only one SF72 storage enclosure or

magazine tape subsystem should be extended 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 inner

assembly out until drawer locks in the service position.

NOTE

Do NOT completely remove the SF72 inner drawer assembly

from 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, as

shown in Figure C–2.

4. Push the SF72 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 located behind the OCP front door

of positions 3 and 8 to match those located in positions 1, 2, 4, and 7

(refer to 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. The ﬁrmly press in on

the right and left side of the OCP.