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

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, CALLOUTS 1 and 2, respectively) as shown in
Figure 6–6. Each bus has four power supplies for a total of eight.
Figure 6–6 Redundant Power Configuration
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.
Figure C
ALLOUTS
1. Power bus A
2. Power bus B
CXO5797A
17
11
CXO6482B
19 20 21 22 23 24
13 14 15 16 18
78910 12
123456
Controller A
Controller B
EMU
PVA
Cache B Cache A
AB
4A
3A
2A
1A
3B
2B
1B
4B
Shelf 4
Shelf 3
Shelf 2
Shelf 1
1
2