Dell Managing RAID Configurations with omconfig and omreport Storage Controller Commands

Example Syntax

For example, you may want to create a RAID 5 virtual disk on a PERC 3/QC controller. The online help will help you understand which read, write, and cache policies are supported by this controller. In this example, you decide to create a virtual disk with the following read, write, and cache policy:

•Read-ahead

•Write–through caching

•Cache I/O

The virtual disk will be 500 MB with a stripe size of 16 KB. The name of the virtual disk will be vd1 and it will reside on connector 0 of controller 1. Because the virtual disk will be a RAID 5, it requires at least three physical disks. In this example, you specify four physical disks. These are physical disks 0 through 3.

To create the virtual disk described in this example, enter:

omconfig storage controller action=createvdisk controller=1 raid=r5 size=500m pdisk=0:0,0:1,0:2,0:3 stripesize=16kb cachepolicy=c readpolicy=ra writepolicy=wt

The only parameters that require specification are for the controller, RAID level, virtual disk size, and physical disk selection. Storage Management supplies default values for all other unspecified parameters.

omconfig Set Controller Rebuild Rate

Use the following omconfig command syntax to set the controller rebuild rate:

Complete Syntax

omconfig storage controller action=setrebuildrate controller=id rate= <0 to 100>

where id is the controller ID as reported by the omreport storage controller command.

Example Syntax

For example, to set the rebuild rate to 50 on controller 1, enter:

omconfig storage controller action=setrebuildrate controller=1 rate=50

omconfig Set Background Initialization Rate

Use the following omconfig command syntax to set the background initialization rate.

Complete Syntax

omconfig storage controller action=setbgirate controller=id rate=<0 to 100>

where id is the controller ID as reported by the omreport storage controller command.

154

Using the Storage Management Service