HP 226593-B21 Smart Array 5i Plus Controller and Battery Backed Write Cache En - Page 56

Logical Configuration View, Select Array A in

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Configuring an Array 1. Back up all data on the array. Although array expansion is unlikely to cause data loss, observing this precaution will provide additional data protection. 2. Install the new physical drives. IMPORTANT: Do not assign a group of physical drives to the same array unless they are of the same capacity. If the drives have different capacities, the excess capacity of the larger drives cannot be used by the array and is wasted. 3. Assign the new physical drives to an existing array. When the expansion process is complete, the extra capacity can be used to increase the size of an existing logical drive (see the "Extending Logical Drive Capacity" section) or to create a new logical drive. For example, consider a controller with these two arrays: • Array A-three 4.3-GB drives in a RAID 5 configuration, no spare. • Array B-two 9.1-GB drives in a RAID 1 configuration, no spare. Now you install a 4.3-GB drive, and want to expand Array A to include this new drive. This scenario is represented in Figure 7-18. Figure 7-18: Array expansion example To expand Array A and create a second logical drive on this array: 1. Select Array A in the Logical Configuration View window. 7-22 Compaq Smart Array 5i Plus Controller and Battery Backed Write Cache Enabler User Guide

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Configuring an Array
7-22
Compaq Smart Array 5i Plus Controller and Battery Backed Write Cache Enabler User Guide
1.
Back up all data on the array. Although array expansion is unlikely to cause data
loss, observing this precaution will provide additional data protection.
2.
Install the new physical drives.
IMPORTANT:
Do not assign a group of physical drives to the same array unless they are
of the same capacity. If the drives have different capacities, the excess capacity of the
larger drives cannot be used by the array and is wasted.
3.
Assign the new physical drives to an existing array. When the expansion process
is complete, the extra capacity can be used to increase the size of an existing
logical drive (see the
“
Extending Logical Drive Capacity
”
section) or to create a
new logical drive.
For example, consider a controller with these two arrays:
•
Array A
—
three 4.3-GB drives in a RAID 5 configuration, no spare.
•
Array B
—
two 9.1-GB drives in a RAID 1 configuration, no spare.
Now you install a 4.3-GB drive, and want to expand Array A to include this new
drive. This scenario is represented in Figure 7-18.
Figure 7-18:
Array expansion example
To expand Array A and create a second logical drive on this array:
1.
Select Array A in the
Logical Configuration View
window.