Promise Technology Network Device EX4650 User Manual page 244

SuperTrak EX Series User Manual
RAID 60 Axles
When you create a RAID 60, you must specify the number of axles. An axle
refers to a single RAID 6 logical drive that is striped with other RAID 6 logical
drives to make RAID 60. An axle can have from 4 to 16 physical drives,
depending on the number of physical drives in the logical drive.
The chart below shows RAID 60 logical drives with 8 to 20 physical drives, the
available number of axles, and the resulting distribution of physical drives on
each axle.
RAID 60 Logical Drive
No. of Drives
8
9
10
11
12
13
14
15
16
17
No. of Axles Drives per Axle
2
2
2
2
2
3
2
3
2
3
2
3
2
3
4
2
3
4
230
4,4
4,5
5,5
5,6
6,6
4,4,4
6,7
4,4,5
7,7
4,5,5
7,8
5,5,5
8,8
5,5,6
4,4,4,4
8,9
5,6,6
4,4,4,5