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.
Caution: When 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 on page 101
• Increasing pool capacity on page 173
• Decreasing pool capacity on page 177
• Deleting pools on page 187
•
Restoring suspended Thin Image pairs on page 143
Usage level rebalancing among parity groups
If multiple parity groups that contain LDEVs used as pool-VOLs exist,
rebalancing can improve biased usage rates in parity groups.
Overview of Thin Image 27
Hitachi Thin Image User Guide for Hitachi Virtual Storage Platform G Series and F Series
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