HP NetRAID Installation and Configuration Guide

Chapter 4 Planning
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◊ Although each drive in an array must have the same capacity, one
logical drive can span two or more arrays with different capacities. For
example, one array might contain three drives of 4 MB each, and the
second array might contain three drives of 12 MB each. One logical
drive can span both of these arrays.
◊ Spanned arrays must be numbered consecutively.
◊ When you use an HP NetRAID utility to configure your system, and
you specify that a logical drive will span arrays, the system will span
all eligible arrays that are numbered consecutively and that contain
the same number of disk drives, up to a maximum of four arrays.
◊ Spanned arrays must be controlled by the same adapter.
Sample Worksheet B
A sample Worksheet B is shown in Figure 4-4.
WORKSHEET B (LOGICAL DEVICES)
LD0
LD1
LD2
LD3
LD4
LD5
LD6
LD7
2
11
5
5
18 GB 64 KB
16 KB
W. Thru.
W. Thru.
W. Thru.
Adapt.
Adapt.
Adapt.
Cached
Cached
Cached64 KB
4 GB
18 GB
No
No
No
0
Use up to eight logical drives, starting with LD0. Start with Array 0, and number consecutively. Span this LD over the next 1-3 consecutive arrays? RAID Level 0, 1, 3, 5, 10, 30, or 50 Optional. You can let the HP NetRAID Assistant Wizard calculate the size.
2 KB, 4 KB, 8 KB, 16 KB, B,32 KB, 64 KB, or 128KB.
Write Back or Write Thru Normal, Read Ahead, or Adaptive Read Ahead Cached I/O or Direct I/O
Logical
Drive #
Array
#
Span RAID
Level
Logical
Drive Size
Stripe
Size
Write
Policy
Read
Policy
Cache
Policy
Figure 4-4. Sample Worksheet B