Enabling Pre-read Consistency Check

Use the Pre-read Consistency Check option to define a  capability to pre-read   information and determine if the data of that virtual disk is consistent. A virtual disk that has this feature enabled returns read errors if the data is determined inconsistent by RAID controller module firmware. You cannot enable this feature for virtual disks that do not contain redundancy information. You can enable redundancy pre-read on a per-virtual disk basis. You can enable this check only for non-high level virtual disks. You can enable this check for normal virtual disks, snapshot base virtual disks and snapshot repository virtual disks. If a virtual disk that is configured with pre-read is migrated to a RAID type that does not maintain redundancy information, the metadata of the virtual disk will continue to reflect the feature property. Reads to that virtual disk will ignore redundancy pre-read. If the virtual disk is subsequently migrated back to a RAID type that supports redundancy, the feature will become available again.

1

In the Logical/Physical view, right-click on a virtual disk, and then select Change >> Pre-read Consistency Check.

2

Select the Enable pre-read consistency check box, and then click OK.

Note: Enabling the feature on virtual disks without redundancy does not affect the virtual disk; however, the attribute is retained for that virtual disk if it is ever changed to one with redundancy information.

3

Click Yes.

You can view whether Pre-read consistency check is enabled by accessing the Virtual Disk Properties window or the Storage Array Profile window.