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Setting The Accelerator Ratio; Expanding An Array - HP 166207-B21 - Smart Array 5302/32 RAID Controller Reference Manual

Smart array controllers configuring arrays.
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Press the Esc key to save the settings and return to the Logical Configuration View panel.
5.

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:
In the Logical Configuration View panel, highlight the controller, and then press the Enter key.
1.
The highlight moves to the Controller Options panel.
Highlight the Controller Settings option, and then press the Enter key.
2.
The Controller Settings panel appears.
Highlight the accelerator ratio setting that you want this controller to use, and then press the Enter
3.
key.
Press the Esc key to save the settings and return to the Logical Configuration View panel.
4.

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
rebuild priority or expand
expand an array during periods of low server use.
To expand an array:
Back up all data on the array. Although array expansion is unlikely to cause data loss, observing
1.
this precaution provides extra data security.
Confirm that the cache battery is connected and fully charged.
2.
In the Logical Configuration View panel, highlight the array, and then press the Enter key.
3.
In the Array Options menu, highlight the Expand Array option, and then press the Enter key.
4.
The screen displays three panels (Expand Array, Physical Drives, and Expand Existing Array), and
the highlight moves to the Expand Array panel.
Highlight the Assign Drive option, and then press the Enter key.
5.
The highlight moves to the Physical Drives panel.
Highlight a physical drive that you want to add to the array, and then press the Enter key. (For
6.
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.
(Optional) Repeat steps 5 and 6 to add more drives.
7.
priority" on page 18). To minimize any effect on normal server operations,
HP Online Array Configuration Utility for NetWare 19
("Setting the

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