Administrator Guide

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 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 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.
• You cannot create a consistency group on a failed virtual disk.
• A consistency group contains one snapshot group for each virtual disk that is a member of the consistency group. You cannot
individually manage a snapshot group that is associated with a consistency group. Instead you must perform the manage operations
(create snapshot image, delete snapshot image or snapshot group, and rollback snapshot image) at the consistency group level.
• If you attempt to create a consistency group snapshot image, the operation might remain in a Pending state because of the following
conditions:
○ The base virtual disk that contains this consistency group snapshot image is a member of an asynchronous remote replication
group.
○ The base virtual disk is in a synchronizing operation. The consistency group snapshot image creation completes when the
synchronization operation is complete.
To create a consistency group:
1. From the AMW, select the Storage & Copy Services tab.
2. Select Copy Services > Consistency Group > Create.
The Consistency Group Settings window is displayed.
3. In the Consistency group name field, enter a unique name (30-character maximum) that best describes the member virtual disks
that you want to add for this group.
By default, the consistency group name is shown in the name text box as:CG + sequence-number
In this example, CG (Consistency Group) is the prefix and sequence-number is the chronological number of the consistency group, and
is incremented based on how many consistency groups currently exist.
4. Select if you want to add the member virtual disks to the consistency group now or later:
• Select Add members now and then from the eligible member virtual disks, select the virtual disks that you want to add as
members to the consistency group. If you choose this method, you must create a repository for each member of the consistency
group. Go to step 5. You can click the Select all check box to add all the virtual disks displayed in the Eligible virtual disks table
to the consistency group.
• Select Add members later and then click Finish to create the consistency group without member virtual disks. Go to step 6.
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Premium feature—Snapshot Virtual Disk