Extended copy time causes and corrective actions

The following table describes some causes and possible responses in the case of extended copy times.

Cause	Corrective action
A processor with an MP usage rate that exceeds 80% exists within the MP unit to which the P-VOL and S-VOL are allocated.	Examine the configuration. For information about checking the MP usage rate, see the Performance Guide of your storage system.
The HOST I/O Performance option is enabled.	Disable the option (see System options).
The S-VOL's HDD or external storage performance is lower than the P-VOL's.	Make the configuration of the S-VOL's HDD or external storage the same as the P-VOL's.
The P-VOL's HDD or external storage has an error.	Review the error and make the necessary correction.
The S-VOL's HDD or external storage has an error.	Review the error and make the necessary correction.
The write pending ratio of the MP blade or unit to which the P-VOL and S-VOL belong exceeds 60%.	Review the configuration.
The available capacity of the pool to which the accelerated compression-enabled P-VOL and S-VOL belong is 120GB or less.	Review the configuration. Check if SIMs related to Dynamic Provisioning pool failures, including SIM code 622xxx (The HDP POOL FULL) or 62axx (Actual HDP pool use rate reaches upper limit), is reported. If reported, take corrective actions for each SIM.