HP ProLiant BL660c Configuring Arrays on HP Smart Array Controllers Reference - Page 19

Setting the accelerator ratio, Expanding an array, The screen displays three panels Expand Array

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5. Press the Esc key to save the settings and return to the Logical Configuration View panel. Setting the accelerator ratio The setting that you use for the accelerator ratio feature determines how much of the cache memory is allocated to read-ahead cache and how much to posted-write cache. Different applications have different optimum settings. This setting applies only if the controller uses a battery-backed cache. To modify the accelerator ratio: 1. In the Logical Configuration View panel, highlight the controller, and then press the Enter key. The highlight moves to the Controller Options panel. 2. Highlight the Controller Settings option, and then press the Enter key. The Controller Settings panel appears. 3. Highlight the accelerator ratio setting that you want this controller to use, and then press the Enter key. 4. Press the Esc key to save the settings and return to the Logical Configuration View panel. Expanding an array You can increase the storage space on an array by adding physical drives. Any drive that you want to add must meet the following criteria: • It must be an unassigned drive. • It must be of the same type as existing drives in the array (for example, SATA or SAS). • It must have a capacity no less than that of the smallest drive in the array. When you want to expand an array, allow about 15 minutes per gigabyte for the expansion to be completed. During this time, the controller cannot perform any other expansion or migration. Performance might be degraded slightly during the expansion, depending on the Expand Priority setting ("Setting the rebuild priority or expand priority" on page 18). To minimize any effect on normal server operations, expand an array during periods of low server use. To expand an array: 1. Back up all data on the array. Although array expansion is unlikely to cause data loss, observing this precaution provides extra data security. 2. Confirm that the cache battery is connected and fully charged. 3. In the Logical Configuration View panel, highlight the array, and then press the Enter key. 4. In the Array Options menu, highlight the Expand Array option, and then press the Enter key. The screen displays three panels (Expand Array, Physical Drives, and Expand Existing Array), and the highlight moves to the Expand Array panel. 5. Highlight the Assign Drive option, and then press the Enter key. The highlight moves to the Physical Drives panel. 6. Highlight a physical drive that you want to add to the array, and then press the Enter key. (For optimum use of drive capacity, select a drive that has the same capacity as other drives in the array.) The highlight returns to the Expand Array panel. 7. (Optional) Repeat steps 5 and 6 to add more drives. HP Online Array Configuration Utility for NetWare 19

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HP Online Array Configuration Utility for NetWare
19
5.
Press the
Esc
key to save the settings and return to the Logical Configuration View panel.
Setting the accelerator ratio
The setting that you use for the accelerator ratio feature determines how much of the cache memory is
allocated to read-ahead cache and how much to posted-write cache. Different applications have different
optimum settings. This setting applies only if the controller uses a battery-backed cache.
To modify the accelerator ratio:
1.
In the Logical Configuration View panel, highlight the controller, and then press the
Enter
key.
The highlight moves to the Controller Options panel.
2.
Highlight the
Controller Settings
option, and then press the
Enter
key.
The Controller Settings panel appears.
3.
Highlight the accelerator ratio setting that you want this controller to use, and then press the
Enter
key.
4.
Press the
Esc
key to save the settings and return to the Logical Configuration View panel.
Expanding an array
You can increase the storage space on an array by adding physical drives. Any drive that you want to
add must meet the following criteria:
•
It must be an unassigned drive.
•
It must be of the same type as existing drives in the array (for example, SATA or SAS).
•
It must have a capacity no less than that of the smallest drive in the array.
When you want to expand an array, allow about 15 minutes per gigabyte for the expansion to be
completed. During this time, the controller cannot perform any other expansion or migration. Performance
might be degraded slightly during the expansion, depending on the Expand Priority setting ("
Setting the
rebuild priority or expand priority
" on page
18
). To minimize any effect on normal server operations,
expand an array during periods of low server use.
To expand an array:
1.
Back up all data on the array. Although array expansion is unlikely to cause data loss, observing
this precaution provides extra data security.
2.
Confirm that the cache battery is connected and fully charged.
3.
In the Logical Configuration View panel, highlight the array, and then press the
Enter
key.
4.
In the Array Options menu, highlight the
Expand Array
option, and then press the
Enter
key.
The screen displays three panels (Expand Array, Physical Drives, and Expand Existing Array), and
the highlight moves to the Expand Array panel.
5.
Highlight the
Assign Drive
option, and then press the
Enter
key.
The highlight moves to the Physical Drives panel.
6.
Highlight a physical drive that you want to add to the array, and then press the
Enter
key. (For
optimum use of drive capacity, select a drive that has the same capacity as other drives in the
array.)
The highlight returns to the Expand Array panel.
7.
(Optional) Repeat steps 5 and 6 to add more drives.