When a TCz volume in Duplex status is used as a Volume Migration volume, the following restrictions must be followed:
- Set I/O rates less than 50 IOPS while migrating volumes. If the I/O rate is more than 50 IOPS, volumes might not be migrated.
- If a data path failure occurs, remove the failure and then migrate the volume.
- If an external volume or a DP-VOL is used, information from before the volume was migrated is displayed in the secondary system CCI command. If the volume migration is completed and the TCz pair is suspended and resynchronized, the volume's information is updated.
- Do not migrate a P-VOL and S-VOL at the same time. If you do, a host I/O timeout error can occur.
- Do not change the status of a volume during migration. If you do, the status might not change.