HP P3410A - NetRAID 1M RAID Controller Installation And Configuration Manual page 28

Chapter 2
Table 2-2. RAID Level Summary for Spanned Arrays
RAID Level
Also Known As striping with
mirrored arrays
Fault Tolerance
Redundancy Type
Hot Spare Option
Disks Required:
spans 2 arrays
spans 3 arrays
spans 4 arrays
spans 5 arrays
spans 6 arrays
spans 7 arrays
spans 8 arrays
Usable Capacity
Capacity Reduction
intermediate
Read Performance
Random Write intermediate
Performance
Sequential Write intermediate
Performance
Mostly small
Typical Usage
random writes
tolerance and
enhanced speed
*HP NetRAID-2M only. The 1M can only support up to 12 disks per adapter while the
2M can support up to 24 disks per adapter, using external disk enclosures.
20
RAID 10
distributed parity
yes
duplicate
yes
4 6, 8, 10, 12, 14*, 16*, 18*, 20*, 22*,
6
9, 12, 15*, 18*, 21*, or 24*
8
12, 16*, 20*, or 24
10
12
14*
16*
least
50% capacity of one disk for each array
Mostly small, random transfers with
fault tolerance and enhanced speed
with fault
RAID Overview
RAID 50
striping with
yes
parity
yes
24*
*
15* or 20*
18* or 24*
21*
24*
intermediate
spanned
fast
slow
slowest