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Power Distribution
6–8 UltraSCSI RAID Enclosure
Any one of the following power related error conditions will cause
this UltraSCSI RAID enclosure to cease operation:
•
Loss of the ac power source
•
Failure of two shelf power supplies
•
Failure of the ac input box
Redundant (n+4) Power Supply
Configurations
This power configuration provides more power redundancy than the
standard configuration. AC power distribution is provided over both
power buses (A and B, C
Figure 6–6. Each bus has four power supplies for a total of eight.
Figure 6–6 Redundant Power Configuration
1
4A
19 20 21 22 23 24
3A
13 14 15 16
2A
7
8
1A
1
2
EMU
A
Cache A
CXO5797A
AC input box A distributes the ac power through four black cords at
the left side of the enclosure. AC input box B distributes the ac power
through four grey cords on the right side of the enclosure.
1 and 2, respectively) as shown in
ALLOUTS
2
4B
Shelf 4
Shelf 3
17
18
3B
Shelf 2
9
10
11
12
2B
Shelf 1
3
4
5
6
1B
PVA
Controller A
B
Controller B
Cache B
CXO6482B
Figure C
ALLOUTS
1.
Power bus A
2.
Power bus B
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