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Dell EMC PowerVault MD 34XX/38XX Series Storage Arrays Administrator's Guide

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Increasing capacity of overall repository

An overall repository can contain multiple repository virtual disks. You can use the Increase Capacity option to increase the storage capacity of an existing overall repository for the following storage objects:
  • Snapshot group
  • Snapshot virtual disk
  • Consistency group member virtual disk
  • Consistency group member snapshot virtual disk
  • Replicated pair

Use this option when you receive a warning that the overall repository is in danger of becoming full. You can increase the repository capacity by performing one of these tasks:

  • Adding one or more existing repository virtual disks.
  • Creating a repository virtual disk using free capacity that is available on a disk group or disk pool.
    NOTE: If no free capacity exists on any disk group or disk pool, you can add unconfigured capacity in the form of unused physical disks to a disk group or disk pool.
You cannot increase the storage capacity of an overall repository if one of these conditions exists:
  • The repository virtual disk that you want to add does not have an Optimal status.
  • Any repository virtual disk in the disk group or disk pool that you want to add is in any state of modification.
  • No free capacity exists in the disk group or disk pool that you want to add.
  • No unconfigured capacity exists in the disk group or disk pool that you want to add.
  • There are no eligible existing repository virtual disks—including mismatched DS attributes.
  • Make sure that a base virtual disk and each of the individual repository virtual disks in the overall repository have the same Data Service (DS) attributes, specifically for the following characteristics:
  • RAID Level—A repository in a disk pool is considered to have a matching RAID Level for any base virtual disk on a disk group, regardless of the base virtual disk’s actual RAID Level. However, a repository on a disk group is considered to have a matching RAID Level only if that RAID Level is identical to the RAID Level of the base virtual disk.
  • Physical Disk Type—A match requires that the base virtual disk and the repository virtual disk reside on either a disk group or disk pool with identical physical disk type attributes.
  • You cannot increase or decrease the repository capacity for a snapshot virtual disk that is read-only because it does not have an associated repository. Only snapshot virtual disks that are read-write require a repository.
To increase the overall repository capacity:
  1. From the AMW, select the Storage & Copy Services tab.
  2. Select the storage object for which you want to increase the repository capacity.
  3. Right click the selected storage object and select Overall Repository > Increase Capacity.
    The Increase Repository Capacity window is displayed.
  4. To increase capacity of the overall repository, do one of the following:
    • Select Add one or more existing repository virtual disks and then go to step 4.
    • Select Create and add new repository virtual disk and then go to step 5.
  5. To add one or more existing repository virtual disks, perform the following steps:
    1. Select one or more repository virtual disks from the Eligible repository virtual disks table.
      The eligible repository virtual disks that have the same DS settings as the associated base virtual disk are only displayed.
      NOTE: You can click the Select all check box to add all the repository virtual disks displayed in the Eligible repository virtual disks table.
    2. Select Allow mismatch in DS attributes to display more repository virtual disks that do not have the same DS settings as the base virtual disk.
  6. To create a repository virtual disk, perform the following steps:
    1. From the Create New Repository On drop-down list, select a disk group or disk pool.
      The drop-down lists only the eligible repository virtual disks that have the same DS settings as the associated base virtual disk. You can select Allow mismatch in DS attributes to display more repository virtual disks that do not have the same DS settings as the base virtual disk.

      If free capacity is available in the disk group or disk pool you selected, the total free space is displayed in the Capacity spinner box.

    2. If necessary, adjust the Capacity.
      NOTE: If free capacity does not exist on the disk group or disk pool you selected, the free space that appears in the Capacity spinner box is 0. If this storage array has Unconfigured Capacity, you can create a disk group or disk pool and then retry this operation using the new free capacity on that disk group or disk pool.
  7. Click Increase Repository.
    The system performs the following actions:
    • Updates the capacity for the repository
    • Displays one or more newly added repository member virtual disks for the repository

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