Dell MD3200i, MD3220i Preferred RAID Controller Module Ownership, Failed RAID Controller Module

168 Configuration: Premium Feature—Virtual Disk Copy

A virtual disk copy can fail due to these conditions:

• A read error from the source virtual disk

• A write error to the target virtual disk

• A failure in the storage array that affects the source virtual disk or the

target virtual disk.

When the virtual disk copy fails, a critical event is logged in the Event Log,

and a Needs Attention icon appears in the Array Management Window.

While a virtual disk copy has this status, the host has read-only access to the

source virtual disk. Read requests from and write requests to the target virtual

disk do not take place until the failure is corrected by using the Recovery

Guru.

Preferred RAID Controller Module Ownership

During a virtual disk copy, the same RAID controller module must own both

the source virtual disk and the target virtual disk. If both virtual disks do not

have the same preferred RAID controller module when the virtual disk copy

starts, the ownership of the target virtual disk is automatically transferred to

the preferred RAID controller module of the source virtual disk. When the

virtual disk copy is completed or is stopped, ownership of the target virtual

disk is restored to its preferred RAID controller module. If ownership of the

source virtual disk is changed during the virtual disk copy, ownership of the

target virtual disk is also changed.

You must manually change RAID controller module ownership to the

alternate RAID controller module to allow the virtual disk copy to complete

under all of these conditions:

• A virtual disk copy has a status of In Progress

• The preferred RAID controller module of the source virtual disk fails

• The ownership transfer does not occur automatically in the failover

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