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Create an array with three physical drives. Then, create two logical drives (labeled
1 and 2) in the array such that you have no available free space. The logical drive
stripes look similar to the following.
Later, you decide you need additional space in the logical drives in the array. First,
you must add more physical drives to the array.
Note: Blocks are labeled as x and * in these examples. All blocks labeled x are the
same size in logical drive 1. All blocks labeled * are the same size in logical
drive 2.
If you add two additional physical drives to the array, the logical drives migrate
such that they are striped across all five drives. The ServeRAID Manager expands
the size of each logical drive in proportion to the original configuration. If there
originally was free space in the array, the free space is increased also.
When increasing logical drive space, you can add up to three physical drives, as
long as the sum of the physical drives does not exceed the maximum physical
drives allowed for the array. The maximum number of physical drives you can
have in an array is limited by the controller stripe-unit size.
For ServeRAID SAS controllers (8i/8k/8k-l) and the ServeRAID-7t
controller, the ServeRAID Manager does not enforce the three physical drive limit
when increasing logical drive size.
174 ServeRAID Manager Installation and User's Guide