Dell PowerVault MD3820f - Manual (Page 149)

• Consistency group member’s snapshot virtual disk
The conversion operation requires that a repository be provisioned to support write operations on the
snapshot virtual disk.
1. From the AMW, select the Storage & Copy Services tab.
2. Select either a snapshot virtual disk or a consistency group member’s snapshot virtual disk and then
select Copy Services → Snapshot Virtual disk → Convert to Read-Write.
3. Select how you wish to create the repository for the Read-Write snapshot virtual disk. Do one of the
following:
– Select Automatic to create the snapshot virtual disk repository with the default capacity settings.
This is the recommended option.
– Select Manual to define the properties for the snapshot virtual disk repository. Use this option if
you want to specify all of the customizable settings for the snapshot virtual disk repository. The
Manual method is considered advanced and only those who understand physical disk
consistency and optimal physical disk configurations should use this method. See the online help
topics for more information on how to set the repository parameters.
4. Click Convert to convert the read-only snapshot virtual disk to read-write.
The snapshot virtual disk or consistency group member’s snapshot virtual disk table as read- write is
displayed under the Mode column, and the Repository columns are now populated.
Viewing Associated Physical Components Of An
Individual Repository Virtual Disk
You can use the View Associated Physical Components option to view the physical components (RAID
controller modules, RAID enclosures, physical disks, and expansion enclosures) that are associated with
an individual repository virtual disk for the following storage objects:
• Snapshot group
• Snapshot virtual disk
• Consistency group member virtual disk
• Consistency group member snapshot virtual disk
• Asynchronous remote replicated pair
1. Select the Storage & Copy Services tab.
2. Select the storage object for which you want to view the associated physical components and then
select Individual Repository Virtual Disk → View Associated Physical Components.
Creating A Consistency Group
A consistency group is simultaneous snapshots of multiple virtual disks, thus ensuring consistent copies
of a group of virtual disks. Each virtual disk that belongs to a consistency group is referred to as a
member virtual disk. When you add a virtual disk to a consistency group, the system automatically creates
a new snapshot group that corresponds to this member virtual disk.
The following guidelines apply:
• If the base virtual disk resides on a standard disk group, the repository members for any associated
consistency group, can reside on either a standard disk group or a disk pool. If a base virtual disk
resides on a disk pool, all repository members for any associated consistency group must reside on
the same disk pool as the base virtual disk.
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