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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
1
The nominal TERMPOWER for both buses is +5 V dc.
The green internal (C
ALLOUT
TERMPOWER LEDs are O
If a TERMPOWER overcurrent condition exists or there is no
TERMPOWER, the associated LED is O
Figure C
1.
2
2.
CXO5829B
2) and external (C
ALLOUT
during normal operation.
N
.
FF
ALLOUTS
External
TERMPOWER
Internal
TERMPOWER
1)
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