Product manual

Chapter 7: Technology Background
271
The chart below shows RAID 50 logical drives with 6 to 32 physical drives, the
available number of axles, and the resulting distribution of physical drives on
each axle.
RAID 50 Logical Drive
No. of
Drives
No. of
Axles
Drives
per Axle
No. of
Drives
No. of
Axles
Drives
per Axle
6 2 3,3 14 2 7,7
7 2 3,4 3 4,5,5
8 2 4,4 4 3,3,4,4
9 2 4,5 15 2 7,8
3 3,3,3 3 5,5,5
10 2 5,5 4 3,4,4,4
3 3,3,4 5 3,3,3,3,3
11 25,6 1628,8
3 3,4,4 3 5,5,6
12 2 6,6 4 4,4,4,4
3 4,4,4 5 3,3,3,3,4
4 3,3,3,3
13 2 6,7
3 4,4,5
4 3,3,3,4
Advantages Disadvantages
• High Read data transaction rate
• Medium Write data transaction
rate
• Good aggregate transfer rate
• High reliability
• Supports large volume sizes
• Higher disk overhead than
RAID 5