Compaq 3200 manual E-19, Daz-9-14.EPS

E-19

Extending the capacity of an existing logical drive can be performed offline by backing up all data, reconfiguring the array, and restoring the data. To extend capacity online, your operating system must support a logical drive increasing in size.

When initiated by the Array Configuration Utility, the Smart Array 3200 Controller automatically redistributes the data in the original logical drive to a logical drive that spans all of the physical drives in the array, including the added drives. The room left over is used to increase the size of a logical drive or to create additional logical drives, also spanning all physical drives. The extended logical drive is writing the larger drive array. When logical drives are added, both logical drives are then included in the drive array with expanded storage capacity. See Figure E-11.

Original

Logical

Drive

Added

Physical

Drives

Data from original logical drive redistributed over "Top" of all physical drives.

New logical drive created over "Bottom" of all physical drives.

Daz-9-14.EPS

Figure E-11. Expanded array storage capacity with a second logical drive

Example: Assume you have two ProLiant Storage Systems with a total of 10 drives and you want to expand this to 14 drives (the Smart Array 3200 Controller supports up to 30 drives). With the Array Configuration Utility running, simply install four matching drives in the empty drive bays. At this point your array will resemble Figure E-10, with the original data (original logical drive) represented by the gray shaded drives and the new drives unshaded. Run the Array Configuration Utility located on the Compaq SmartStart and Support Software CD to start the expansion process described in Chapter 5.

Compaq Smart Array 3200 Controller Reference Guide