You must be aware of certain limitations when performing online migration.
The limitations of online migration are as follows:
- Does not support migration of data from Data ONTAP 7.3.3 to Data ONTAP 8.1 and from Data ONTAP 8.1 to Data ONTAP 7.3.3.
- Does not support migration of data from 64-bit source volume to 32-bit destination volume, and 32-bit source volume to 64-bit destination volume.
If the migrating vFiler unit contains both 32-bit volume and 64-bit volume, online migration is supported only when the following occur:
- 32-bit source volume mirrors to 32-bit volume on the destination storage system.
- 64-bit source volume mirrors to 64-bit volume on the destination storage system.
- Does not support migration of data from source volume to conversion volume on the destination storage system.
A conversion volume is an in-progress upgrade mode (32-bit to 64-bit) volume.
- Does not support migration of data from source volume that is in conversion mode.
If the migrating source volume is in conversion mode, the NetApp Management Console provisioning capability performs the following actions:
- If a migrating vFiler unit is in conversion mode before the migration start operation, the NetApp Management Console provisioning capability depends on MultiStore to get confirmation on the status of migration.
- If a migrating vFiler unit is in conversion mode during the migration start operation, the NetApp Management Console provisioning capability depends on MultiStore to get confirmation on the status of migration.
If the migration start operation completes successfully, then the NetApp Management Console provisioning capability changes the migration status to "Migrating, cutover required". Otherwise, the NetApp Management Console provisioning capability reverts all migration start changes done so far, and changes the status to "Not started".
- If a migrating vFiler unit is in conversion mode after the migration start operation and before the migration cutover operation, the NetApp Management Console provisioning capability reverts all the changes done so far, and changes the status back to "Migrating, cutover required".
- If a migrating vFiler unit is in conversion mode during the migration cutover operation, the NetApp Management Console provisioning capability depends on MultiStore to get confirmation on the status of migration.
If the migration cutover operation completes successfully, then the NetApp Management Console provisioning capability changes the migration status to "Migrated, cleanup required". Otherwise, the NetApp Management Console provisioning capability reverts all migration cutover changes done so far, and changes the status to "Migrating, cutover required".