Accelerated compression-enabled parity groups

Data on LDEVs carved from parity groups comprised of FMC drives is compressed before it is stored onto the drives. The default setting of accelerated compression is Disabled. You must set this feature to Enable to take advantage of the data compression services on the FMC drives.

When you enable accelerated compression on a parity group comprised of FMC drives:

• The capacity of the parity group expands the usable physical capacity of the parity group. You can potentially carve out LDEVs from this expanded capacity and use them as pool volumes to create or expand a pool. When you do this, you can utilize the increased available capacity because the data on the FMC drives has been compressed.
• LDEVs carved from the accelerated compression-enabled parity groups can only be used as pool volumes to create or expand a pool. These LDEVs cannot be assigned directly to a host and must be assigned to a single pool as pool volumes. LDEVs from a single parity group cannot be shared among multiple pools.

  

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• About pool volumes from accelerated compression-enabled parity groups

  Volumes carved from accelerated compression-enabled parity groups can only be used as pool volumes to create or expand a pool. Pools that contain pool volumes from accelerated compression-enabled parity groups must be monitored to ensure adequate pool capacity. You can set thresholds for used pool capacity that trigger the output of SIMs when exceeded, enabling you to expand the pool or delete unwanted data before the pool becomes full.