Example: Increasing free space

Create an disk group with three physical drives. Then, create two logical devices (labeled 1 and 2) in the disk group such that you have no available free space. The logical device stripes look similar to the following.

Later, you decide to create another logical device in the disk group. First, you must create some free space by adding more physical drives to the disk group.

If you add two more physical drives to the disk group, the logical devices migrate such that they are striped across all five drives. The Adaptec Storage Manager retains the size of the logical device by decreasing the size of each block on a physical drive. The space in the logical devices does not increase, so there is free space across the bottom portion of each physical drive (labeled 3).

When the operation is complete, use "Create logical drive" to create a new logical device in the free space.

When increasing free space, you can add up to three physical drives, as long as the sum of the physical drives does not exceed the maximum number of physical drives allowed for the disk group. The maximum number of physical drives you can have in an disk group is limited by the controller stripe-unit size.

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