How Thin Image uses pools and pool volumes

Thin Image stores snapshot data in DP pools (Pool Type: Dynamic Provisioning) or Thin Image pools (Pool Type: Thin Image). Unless they are defined otherwise, both DP pools and Thin Image pools are referred to as "pools". A pool consists of multiple pool volumes (pool-VOLs) which are, as a group, the container for the snapshot data.

You must create pools to use Thin Image. You can create pools and add and delete pool-VOLs from them using Thin Image.

The following figure illustrates the relationship between a Thin Image pair and a pool.

CautionWhen creating pools, calculate the pool capacity and reserve a sufficient amount of pool capacity. When you write data to Thin Image pair volumes and the amount of pool usage exceeds the pool capacity, the Thin Image pair is suspended (“PSUE” status), snapshot data is not stored, and you cannot create additional Thin Image pairs.
Related Tasks
  • Creating Thin Image data pools

    You can create Thin Image data pools using HDvM - SN. For information about the creation of DP pools, see the Provisioning Guide for your storage system.

  • Restoring suspended Thin Image pairs

    When pairs are suspended ("PSUE" status) after a failure occurs, they need to be restored.

  • Decreasing pool capacity

    You can decrease the pool capacity for up to eight tasks at the same time.

  • Deleting pools

    You can delete pools that have a 0% usage rate and that are not assigned for DP-VOLs.

  • Increasing pool capacity

    Adding pool-VOLs to a pool increases, or expands, the pool’s capacity. Check the pool’s available capacity and expand the pool as needed.

Parent Topic