Pool usage level exceeds the threshold.

Causes:

• Too many DP-VOLs are associated with a pool, or too much data is stored in a pool.

• Capacity of the pool is insufficient.

• The threshold of the pool is too low.

Solutions:

• Add some pool-VOLs to increase the capacity of the pool. See Increasing pool capacity.

• Perform the operation to reclaim zero pages in order to release pages in which zero data are stored. See About releasing pages in a DP-VOL.

• Set a larger value to the threshold of the pool. See Changing pool thresholds.

Caution: You need free volumes to add as pool-VOLs. If there are no free volumes, create new volumes or ask the Hitachi Data Systems customer support to add drives. Therefore, it may take time to solve the problem.

Cannot create a DP-VOL.

Causes:

• Usage of the pool has reached to 100%.

• Something in the storage system is blocked.

• The available capacity of DP-VOL is restricted due to the value of Subscription-Limit set for the pool.

Solutions:

• Add some pool-VOLs to the pool. See Increasing pool capacity.

• Perform the operation to reclaim zero pages in order to release pages in which zero data are stored. See About releasing pages in a DP-VOL.

• Adjust the value of Subscription Limit for the pool. See Changing the pool subscription limit.

• Ask the Hitachi Data Systems customer support to solve the problem.

Cannot add a pool-VOL.

Causes:

• 1,024 pool-VOLs are already defined in the pool.

• The pool-VOL does not fill the requirements for a pool-VOL.

• Something in the storage system is blocked.

Solution:

• Change the setting of the LDEV to satisfy the requirement of the Pool-VOL. .

A pool-VOL is blocked. SIM code 627xxx is reported.

Causes:

• A failure occurred in data drives greater than the parity group redundancy. The redundancy of the parity group depends on the number of the blocked PDEVs (data drives). For example:

• When the parity group configuration is 3D+1P and failures occur in two or more drives, the failures are considered to have occurred in data drives beyond the parity group redundancy.

• When the parity group configuration is 6D+2P and failures occur in three or more drives, the failures are considered to have occurred in data drives beyond the parity group redundancy.

Solutions:

• Ask the Hitachi Data Systems customer support to solve the problem.

A pool is blocked.

Solutions:

• Ask the Hitachi Data Systems customer support to solve the problem.

A pool cannot be restored.

Causes:

• Processing takes time, because something in the storage system is blocked.

• Usage of the pool has reached to 100%.

Solutions:

• Add some pool-VOLs to the pool to increase the capacity of the pool. See Increasing pool capacity).

• Perform the operation to reclaim zero pages in order to release pages in which zero data are stored. See About releasing pages in a DP-VOL.

• Ask the Hitachi Data Systems customer support to solve the problem.

A pool cannot be deleted.

Causes:

• The pool usage is not 0.

• External volumes are removed from the pool before you delete the pool.

• DP-VOLs have not been deleted.

Solutions:

• Confirm that the pool usage is 0 after the DP-VOLs are deleted, then you can delete the pool.

• Ask the Hitachi Data Systems customer support to solve the problem.

A failure occurs to the application for monitoring the volumes installed in a host.

Causes:

• Free space of the pool is insufficient.

• Some areas in the storage system are blocked.

Solutions:

• Check the free space of the pool and increase the capacity of the pool. See Increasing pool capacity).

• Perform the operation to reclaim zero pages in order to release pages in which zero data are stored. See About releasing pages in a DP-VOL.

• Ask the Hitachi Data Systems customer support to solve the problem.

When the host computer tries to access the port, error occurs and the host cannot access the port.

Causes:

• Free space of the pool is insufficient.

• Some areas in the storage system are blocked.

Solutions:

• Check the free space of the pool and increase the capacity of the pool. See Increasing pool capacity.

• Perform the operation to reclaim zero pages in order to release pages in which zero data are stored. See About releasing pages in a DP-VOL.

• Ask the Hitachi Data Systems customer support to solve the problem.

When you are operating Hitachi Device Manager - Storage Navigator, a timeout occurs frequently.

Causes:

• The load on the management client is too heavy, so that it cannot respond to SVP.

• The period of time until when time-out occurs is set too short.

Solutions:

• Wait for a while, then try the operation again.

DP-VOL capacity cannot be increased.

See Troubleshooting provisioning while using Command Control Interface and identify the cause.

Solutions:

• Retry the operation after 10 minutes or so.

• Ask the Hitachi Data Systems customer support to solve the problem.

Cannot reclaim zero pages in a DP-VOL.

Causes:

• Zero pages in the DP-VOL cannot be reclaimed because the DP-VOL does not meet conditions for releasing pages in a DP-VOL.

Solutions:

• Make sure that the DP-VOL meets the conditions described in Releasing pages in a DP-VOL.

The DP-VOL cannot be released if the process to reclaim zero pages in the DP-VOL is interrupted.

Causes:

• Pages of the DP-VOL are not released because the process of reclaiming zero pages was interrupted.

Solutions:

• Make sure that the DP-VOL meets the conditions described in Releasing pages in a DP-VOL.

Cannot release the Protect attribute of the DP-VOLs.

SIM code 628000 was issued.

Causes:

• The pool is full.

• The pool-VOL is blocked.

• The pool-VOL that is an external volume is blocked.

Solutions:

• Add pool-VOLs to the pool to increase the free space in the pool. See Increasing pool capacity.

• Perform the reclaiming zero pages operation to release pages in which zero data are stored. See Releasing pages in a DP-VOL.

• Contact the Hitachi Data Systems customer support to restore the pool-VOL.

• If the blocked pool-VOL is an external volume, verify the status of the path blockade and the external storage system.

• After performing above solutions, release the Protect attribute (Data Retention Utility) of the DP-VOLs. For information about Data Retention Utility, see relevant chapters in this user guide.

SIM code such as 620xxx, 625000 or 626xxx was issued.

Causes:

• Pool usage level exceeds the threshold.

Solutions:

• Add pool-VOLs to the pool to increase the free space in the pool. See Increasing pool capacity.

• Perform the operation to reclaim zero pages in order to release pages in which zero data are stored. See About releasing pages in a DP-VOL.

SIM code 622xxx was issued.

Causes:

• Usage of the pool has reached 100%.

Solutions:

• Add pool-VOLs to the pool to increase the free space in the pool. See Increasing pool capacity.

• Perform the operation to reclaim zero pages in order to release pages in which zero data are stored. See About releasing pages in a DP-VOL.

The Protect attribute of Data Retention Utility may have been set to DP-VOLs. After performing above solutions, release the Protect attribute of the DP-VOLs.

SIM code 624000 was issued.

Causes:

• The pools and DP-VOLs configuration, of which the size is more than the supported capacity, is created.

Solutions:

• Remove pools that are not used.

• Remove DP-VOLs that are not used.

• Remove Thin Image pairs that are not used.

• Shrink pools capacities.

Formatted pool capacity displayed in the View Pool Management Status window does not increase.

Causes:

• Another pool is being formatted.

• The pool usage level reaches up to the threshold.

• The pool is blocked.

• I/O loads to the storage system are high.

• The cache memory is blocked.

• Pool-VOLs are blocked.

• Pool-VOLs which are external volumes are blocked.

Solutions:

• Confirm the display again after waiting for a while.

• Add pool-VOLs to the pool to increase the free space in the pool. For more information, see Increasing pool capacity.

• Perform the operation to reclaim zero pages in order to release pages in which zero data are stored. See About releasing pages in a DP-VOL.

• Confirm the display again after decreasing I/O loads of the storage system.

• Contact the Hitachi Data Systems customer support to restore the cache memory.

• Contact the Hitachi Data Systems customer support to restore the pool-VOL.

• If the blocked pool-VOL is an external volume, confirm following:

• Path blockage

• Status of the storage system