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Compaq Smart Array 3200 Controller Reference Guide
Writer: Rickard Project: Compaq Smart Array 3200 Controller Reference Guide Comments: 340862-002
File Name: L-APPE.DOC Last Saved On: 12/7/98 9:30 AM
COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED
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.
Daz-9-14.EPS
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.
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.