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

Setting Snapshot Virtual Disk Repository Virtual Disk Capacity

To increase or decreases the capacity of a snapshot virtual disk repository virtual disk, use the set snapVirtualDisk command.

A snapshot repository virtual disk is an expandable virtual disk that is structured as a concatenated collection of up to 16 standard virtual disk entities. Initially, an expandable repository virtual disk has only a single element. The capacity of the expandable repository virtual disk is exactly that of the single element. You can increase the capacity of an expandable repository virtual disk by attaching additional standard virtual disks to it. The composite expandable repository virtual disk capacity then becomes the sum of the capacities of all of the concatenated standard virtual disks.

A snapshot group repository virtual disk must satisfy a minimum capacity requirement that is the sum of the following:

32 MB to support fixed overhead for the snapshot group and for copy-on-write processing.
Capacity for rollback processing, which is 1/5000th of the capacity of the base virtual disk.

If you are creating a new repository virtual disk when you run this command, you must enter the name of a disk group or disk pool from which you want the repository virtual disk. Optionally, you can also define the capacity of the repository virtual disk. The following capacity values are supported:

A percentage ( integer value) representing an amount of the base virtual disk capacity.
A decimal fraction representing a percentage of the base virtual disk capacity.
A specific size for the repository virtual disk, in units of bytes, KB, MB, GB, or TB.

To increase capacity for a snapshot virtual disk, use the increaseRepository Capacity and capacity parameter as shown below:

set snapVirtualDisk[“
                                    snapVirtualDiskName”] increaseRepositoryCapacity repositoryVirtualDisks=("repos_xxxx" | repositoryVirtualDisks=(
                                    diskGroupName [capacity=
                                    capacityValue]) repositoryVirtualDisks=(
                                    diskPoolName [capacity=
                                    capacityValue]))

To decrease capacity, replace increaseRepositoryCapacity with decreaseRepository:

set snapVirtualDisk ["
                                    snapVirtualDiskName"] decreaseRepositoryCapacity count=
                                    numberOfVirtualDisks

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

Setting Snapshot Virtual Disk Repository Virtual Disk Capacity

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