Compaq StorageWorks UltraSCSI RAID Enclosure (DS-BA370 Series) User's Guide (EK-BA370-UG. C02, September 1998)

Single-Ended I/O Module

5–6 UltraSCSI RAID Enclosure

Only when all I/O modules are the same type can an UltraSCSI RAID

subsystem function properly. The Compaq UltraSCSI controller only

supports single-ended buses. Therefore, use only single-ended I/O

modules (DS–BA35X–MN). The enclosure does not support the

following conditions:

• Improperly installing a single-ended I/O module

• Installing fewer than six single-ended I/O modules

• Installing a termination I/O module

• Installing a differential I/O module

TERMPOWER Errors

The I/O module displays a TERMPOWER status indication for both

the internal and external bus as shown in Figure 5–4.

Figure 5–4 I/O Module TERMPOWER LEDs

The nominal TERMPOWER for both buses is +5 V dc.

The green internal (C

ALLOUT 2) and external (CALLOUT 1)

TERMPOWER LEDs are ON during normal operation.

If a TERMPOWER overcurrent condition exists or there is no

TERMPOWER, the associated LED is O

FF.

Figure C

ALLOUTS

1. External

TERMPOWER

2. Internal

TERMPOWER

CXO5829B