Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

To perform the same snapshot image operations on multiple virtual disks, you can create a consistency group containing the virtual disks. Any operation performed on the consistency group is performed simultaneously on all of the virtual disks in that group, which creates consistent copies of data between each virtual disk. Consistency groups are commonly used to create, schedule or rollback virtual disks.

Each virtual disk belonging 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. You can set up a schedule for a consistency group to automatically create a snapshot image of each member virtual disk at a specific time and/or on a regular basis.

This synchronized snapshot of all the virtual disks is especially suitable for applications that span multiple virtual disks, such as a database application containing log files on one virtual disk and the database itself on another.