HP StorageWorks HSG80 ACS Solution Software V8.8 for IBM AIX Installation and Configuration Guide (AA-RV1HA-TE, March 2005)

Planning Storage Configurations
87HSG80 ACS Solution Software V8.8 for IBM AIX Installation and Configuration Guide
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Figure 29: Striped mirrorset (example 1)
The failure of a single disk drive has no effect on the ability of the storageset to
deliver data to the host. Under normal circumstances, a single disk drive failure
has very little effect on performance. Because striped mirrorsets do not require
any more disk drives than mirrorsets, this storageset is an excellent choice for data
that warrants mirroring.
Figure 30: Striped mirrorset (example 2)
D
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k
1
0
0
0
0
CXO7289A
D
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k
2
0
1
0
0
D
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k
1
0
2
0
0
D
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2
0
0
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D
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Mirrorset1 Mirrorset2 Mirrorset3
p
A
B
C
A'
B'
C'
Virtual disk
Block 0
Block 1
Block 2
Block 3
Block 4
Block 5
etc.
Disk 1
Block 0
Block 3
Block 6
Disk2
Block 0
Block 3
Block 6
Disk 3
Block1
Block 4
Block 7
Disk 4
Block 1
Block 4
Block 7
Disk 5
Block 2
Block 5
Block 8
Disk 6
Block 2
Block 5
Block 8
Operating
system
view
Actual
device
mappings
Stripeset
CXO6462A
Virtual disk #1 Mirrorset Virtual disk #2 Mirrorset Virtual disk #3 Mirrorset
Controller
internal
mapping