If it is taking a long time to migrate volumes, there might be a bottleneck. The following table lists the causes of bottlenecks and provides recommended action for each cause.
|
Cause |
Recommended action |
|---|---|
|
The Host I/O Performance option of ShadowImage is enabled. |
Disable the Host I/O Performance option of ShadowImage. |
|
The Host I/O Performance option of ShadowImage for Mainframe is enabled. |
Disable the Host I/O Performance option of ShadowImage for Mainframe. |
|
Performance of the data drive or the external storage of the target volume is lower than one of the source volume. |
Review the configuration. |
|
The MP usage rate of all processors of the MP unit to which the source volume and the target volume are allocated exceeds 80%. |
Review the configuration. For details about how to check the MP usage rate, see the VSP One Block Administrator Guide. |
|
An error occurs in the data drive or the external storage of the target volume. |
Remove the error in the data drive or the external storage of the target volume. |
|
An error occurs in the data drive or the external storage of the source volume. |
Remove the error in the data drive or the external storage of the source volume. |
|
The cache write pending rate of the MP unit to which the target volume belongs exceeds 60%. |
Review the configuration. |
|
The free space of the pool to which the target volume (DRS-VOL) belongs is no more than 120 GB. |
Review the configuration. And check whether SIM (DP pool is full: 622xxx, etc.) of Dynamic Provisioning pool failure is reported. If it is reported, follow the solutions of each SIM. |
|
The Compatible Multiplicity Mode (local replica option No. 5) is enabled. |
Review the configuration, and then disable the Compatible Multiplicity Mode (local replica option No. 5). |