Configuration: PremiumFeature—Virtual Disk Copy 173
• To enable Read-Only permission, select
Change

Target Virtual Disk
Permis sions

Enable Read-Only
.
NOTE: Write requests to the target virtual disk are rejected when the Read-
Only permission is enabled on the target virtual disk.
• To disable Read-Only permission, select
Change

Targ et Vir tua l
Disk Permissions

Disable Read-Only
.
Virtual Disk Copy Restrictions
Before you perform any virtual disk copy tasks, understand and adhere to the
restrictions listed in this section. The restrictions apply to the source virtual
disk, the target virtual disk, and the storage array.
• While a virtual disk copy has a status of
In Progress
,
Pendin g
, or
Failed
,
the source virtual disk is available for read I/O activity only. After the
virtual disk copy is complete, read and write I/O activity to the source
virtual disk are permitted.
• A virtual disk can be selected as a target virtual disk for only one virtual
disk copy at a time.
• A virtual disk copy for any virtual disk cannot be mounted on the same
host as the source virtual disk.
• Windows does not allow a drive letter to be assigned to a virtual disk copy.
• A virtual di sk with a
Failed
status cannot be used as a source virtual disk or
target virtual disk.
• A virtual disk with a
Degraded
status cannot be used as a target
virtual disk.
• A virtual disk participating in a modification operation cannot be selected
as a source virtual disk or target virtual disk. Modification operations
include the following:
– Capacity expansion
– RAID-level migration
– Segment sizing
– Virtual disk expansion
– Defragmenting a virtual disk
book.book Page 173 Tuesday, June 18, 2013 3:03 PM