NEC Express5800/R110d-1E Guía de usuario descargar pdf (Pagina 80)

Changing Cache Mode of Logical Drive

You can change the cache mode of Logical Drive.

The setting of the cache mode of Logical Drive influences the performance of computer.

Please change carefully.

Changing cache mode

The procedure of changing cache mode of Logical Drive is described below.

The range of change differs depending on the type of the RAID Controller.

RAID Controller

Changed cache

Range of change

Onboard RAID Controller (LSI

Embedded MegaRAID

)

Hard Disk Drive All the Logical Drives in a single

Disk Array.

Option and Internal RAID

Controller

RAID Controller (You can change each of Logical

Drive.)

Only the Logical Drive selected

Changing cache mode is available only in the Advanced Mode.

RAID Viewer

Change the property of Logical Drive.

Step 1

Start the RAID Viewer. Click the Logical Drive on the Tree View. Then click [Properties] on the pull-down menu

of menu item [File].

Step 2 Click the [Options] tab in the [Logical

Drive Properties] dialog box. Change the value of

[Cache Mode (Setting)] to [Auto Switch], [Write Back],

or [Write Through]. Click [OK] or [Apply].

raidcmd

Use "optld" command.

Step 1 Execute "optld" command with -cm option

and the following parameters.

-c : Number of the RAID Controller for which Cache Mode

change

-l : Number of the Logical Drive for which Cache Mode

change

-cm : Value set after Cache Mode is set (Select a value

out of auto, writeback, or writethru)

Step 2 Check the execution result by using

property" command.

> raidcmd optld -c=1 -l=1 -cm=auto

> raidcmd property -tg=ld -c=1 -l=1

RAID Controller #1 Logical Drive #1

ID : 0

Physical Device Number : 1, 2, 3

Disk Array Information : 1 (order 1/1)

RAID Level : RAID 5

Capacity : 20GB

Stripe Size : 64KB

Cache Mode (Setting) : Auto

Cache Mode (Current) : Write Back

Status : Online

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NEC Express5800/R110d-1E Guía de usuario Pagina 80

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