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Hardware Architecture
The ST9985V hardware is divided into the power supply section, controller section, and disk drive
section in which disk drives are installed. The power supply section consists of the AC-boxes, AC-DC
power supplies, and battery boxes. The controller section consists of the channel adapters (CHAs),
disk adapters (DKAs), cache memory boards (CACHEs), shared memory boards (SMs), and disk
units (DKUs). Each component is connected over the cache paths, SM paths, and/or disk paths. The
batteries installed in the ST9985V are nickel metal hydride batteries.
Note:
The shared memory for the ST9985V is now mounted on separate PCBs (was mounted on the
cache boards for previous RAID subsystems). This new design eliminates the performance
degradation (caused by write-through mode) previously experienced during shared memory
replacement.
Just the Facts
October 2007
34
Sun Confidential – For Internal Use and Authorized Partner Use Only
Power supply boundary
Cluster 1
Front
C
H
A
2
C
S
W
DIMM
1G
S
M
A
Logic PL
PCB
Location
Option1
Option2 Basic
1H
1CA
2SB
2J
2K
DIMM
C
M
A
DIMM
DIMM
C
S
W
C
H
A
1
Option1
Option1
Option2
Cluster 2
C
H
A
1
C
M
A
D
K
A
C
H
A
3
D
K
A
S
M
A
Option1
C
H
A
2
C
H
A
3
2L
Option1 Basic Option3 Option1
Option1
Option3
Option1
1SA
1D
1B
1A
2CC
2E
2F
PCB
Location
Содержание StorageTek 9985V
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