IBM 86655RY - Netfinity 7600 - 8665 Hardware Maintenance Manual page 207

Then, create a logical drive within that array.
The data is striped across the drives, creating blocks.
Notice that the stripe labeled
the copy of the preceding data stripe. Also notice that each block on the mirror
stripe is shifted one drive.
With RAID level-1E, if one of the physical drives fails, the ServeRAID controller
switches read and write requests to the remaining functional drives in the RAID level-
1E array.
Understanding RAID level-5: RAID level-5 requires a minimum of three physical
drives. This RAID level stripes data and parity across all drives in the array. When
you assign RAID level-5 to an array, the capacity of the array is reduced by the
capacity of one drive (for data-parity storage).
RAID level-5 offers both data protection and increased throughput. RAID level-5
gives you higher capacity than RAID level-1, but RAID level-1 offers better
performance.
RAID level-5 requires a minimum of 3 drives and supports a maximum of 16 drives.
The following illustration is an example of a RAID level-5 logical drive.
Start with four physical drives.
is the data stripe and the stripe labeled
1 2 3
*
**
3 1 2
4 5 6
*
6 4 5
**
Installing and configuring ServeRAID controllers
is
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