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RAID 30 and 50 Axles
When you create a RAID 30 or RAID 50, you must specify the number of axles.
An axle refers to two or more RAID 3 logical drives striped together to make a
RAID 30. Or an axle could be two or more RAID 5 logical drives striped together
to make a RAID 50.
An axle can have from 3 to 32 physical drives, depending on the number of
physical drives in the logical drive. The chart below shows RAID 30 and 50
logical drives with 6 to 16 physical drives, the available number of axles, and the
resulting distribution of physical drives on each axle.
No. of
No. of
Drives
Axles
6
7
8
9
10
11
12
13
RAID 30 and 50 Logical Drive
Drives per
Axle
2
3,3
2
3,4
2
4,4
2
4,5
3
3,3,3
2
5,5
3
3,3,4
2
5,6
3
3,4,4
2
6,6
3
4,4,4
4
3,3,3,3
2
6,7
3
4,4,5
4
3,3,3,4
Chapter 9: Technology Background
No. of
Drives
14
15
16
329
No. of
Drives per
Axles
Axle
2
7,7
3
4,5,5
4
3,3,4,4
2
7,8
3
5,5,5
4
3,4,4,4
5
3,3,3,3,3
2
8,8
3
5,5,6
4
4,4,4,4
5
3,3,3,3,4
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