NEC Express5800/R110d-1E Guía de usuario descargar pdf (Pagina 71)

Maintenance of RAID System

This chapter describes the maintenance of a RAID System using the Universal RAID Utility.

Providing Patrol Read for Physical Devices

The Patrol Read function reads data saved in all Physical Devices in a RAID System entirely to check whether a read

error occurs or not regularly in the background. The Patrol Read is effective to find failures including Physical Device

medium error early. Be sure to execute Patrol Read for a RAID Controller if it supports the Patrol Read.

The Universal RAID Utility provides the function of indicating whether Patrol Read is executed or not and the function of

changing the Patrol Read Priority.

Setting Whether Patrol Read Is Executed or Not

Whether Patrol Read is executed or not should be set in RAID Controllers. The procedure of setting whether Patrol

Read is executed or not is described below.

Changing the setting whether Patrol Read is executed or not is available only in the Advanced

Mode.

RAID Viewer

Change the property of RAID Controller.

Step 1

Start the RAID Viewer. Click a RAID Controller on the Tree View. Then click [Properties] on the pull-down

menu of menu item [File].

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

Controller Properties] dialog box. Change the value of

[Patrol Read] to [Enable] or [Disable]. Click [OK] or

[Apply].

RAID Controllers of some types may not support Patrol Read. If the Patrol Read is not

supported, items [Patrol Read] and [Patrol Read Priority] on the [Options] tab do not appear.

raidcmd

Use "optctrl" command.

Step 1 Execute "optctrl" command with -pr option

and the following parameters.

-c : Number of the RAID Controller for which whether Patrol

Read is executed or not is set

-pr : Specify "enable" to allow Patrol Read / Specify

"disable" not to allow Patrol Read.

Step 2 Check the execution result by using

"property" command. The following parameter of RAID

Controller is changed.

[Patrol Read] : "enable" to allow Patrol Read

"disable" not to allow Patrol Read

> raidcmd optctrl -c=1 -pr=enable

> raidcmd property -tg=rc -c=1

RAID Controller #1

ID : 0

Vendor : LSI Corporation

Model : MegaRAID SAS PCI Express(TM)

ROMB

Firmware Version : 1.12.02-0342

Cache Size : 128MB

Battery Status : Normal

Rebuild Priority : High

Consistency Check Priority : Low

Patrol Read : Enable

Patrol Read Priority : High

Buzzer Setting : Enable

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