RA7000 and ESA10000 Storage Subsystems
1–22
EK–SMCPP–UG. A01
1.6
Power Supply SBBs
CAUTION
The subsystem requires power supply SBBs rated
for at least 180 W such as the DS-BA35X-HH.
You cannot use lower rated supplies, such as the
131 W (DS-BA35X-HA), the 145 W (DS-BA35X-
HD), or the 150 W (DS-BA35X-HF).
The 180 W shelf power supply SBB (Figure 1-13) converts the ac voltage from
the power controller to +5 V dc and +12 V dc for distribution throughout the
storage subsystem. The maximum capacity of the storage subsystem is eight
power supplies.
Figure 1–13 Typical Shelf Power Supply SBB
POWER
STATUS LED
(GREEN)
POWER SUPPLY
STATUS LED
(GREEN)
The 4 + 1 standard configuration provides five power supplies connected to
power bus A (the black power cords). As long as any four of these supplies are
operational, the subsystem is operational. The failure of a second supply places
the subsystem controller in a reset state. This precludes further data processing
and prevents the corruption or loss of the stored data.
With the 4 + 4 full redundant power option, the subsystem can survive multiple
power supply faults. To fully realize the benefits of the 4 + 4 configuration,
connect the power controllers to different ac distribution circuits on the same site
distribution panel.
