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 (C
ALLOUT
1)
TERMPOWER LEDs are O
N
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
1
2
