Dell POWERVAULT MD3600I - Manual (Page 169)

on a source virtual disk or a target virtual disk after a virtual disk copy has been created, the modification operation must
complete before the virtual disk copy can start. If a virtual disk copy has a status of In Progress, any modification
operation does not take place.
Create Copy Wizard
The Create Copy Wizard guides you through:
• Selecting a source virtual disk from a list of available virtual disks
• Selecting a target virtual disk from a list of available virtual disks
• Setting the copy priority for the virtual disk copy
When you have completed the wizard dialogs, the virtual disk copy starts, and data is read from the source virtual disk
and written to the target virtual disk.
Operation in Progress icons are displayed on the source virtual disk and the target virtual disk while the virtual disk copy
has a status of In Progress or Pending.
Failed 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 is displayed in the
AMW. 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.
Failed RAID Controller Module
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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