Is it possible to convert an XDP relationship to a DP relationship in ONTAP?

Why can't I convert it?

• Type DP uses BRE (Block Replication Engine) which tracks each block and is unaware of the file system structure
  • BRE reads blocks from the source aggregate.
  • It then sends the data over the network to the destination aggregate.
  • Lastly, it writes the to the destination aggregate.
• Type XDP uses is LRE/LRSE (Logical Replication Engine / Logical Replication engine with Storage Efficiency). 
  • LRSE tracks the data logically based on the file system structure.
  • XDP transfers do logical writes which are within the flexvol.
• The engine that -type XDP mirrors, SnapVault, and version-independent SnapMirror, use is LRE/LRSE (Logical Replication Engine / Logical Replication engine with Storage Efficiency). 
  • LRSE tracks the data logically based on the file system structure.
  • XDP transfers do logical writes which are within the flexvol.
• So when the resync is attempted, BRE cannot find any snapshots that hold block-based references to the data so it reports that there are no common snapshots since the block-based engine cannot understand the logical tracking.

Common issues after attempting to convert

• Resync back to the source (after converting from XDP to DP) will fail with the following error message

No common Snapshot copy found between <source> <destination>

• Running snapmirror show command (after converting from XDP to DP) will fail with the following error message

cluster_82b::> snapmirror update -destination-path vs2:vs2_sv_dest Operation is queued: snapmirror update of destination vs2:vs2_sv_dest
cluster_82b::> snapmirror show -destination-path vs2:vs2_sv_dest

Source Path: vs1_test:compress_test
Destination Path: vs2:vs2_sv_dest
Relationship Type: DP
SnapMirror Schedule: -
Tries Limit: -
Throttle (KB/sec): unlimited
Mirror State: Snapmirrored
Relationship Status: Idle
Transfer Snapshot: -
Snapshot Progress: -
Total Progress: -
Snapshot Checkpoint: -
Newest Snapshot: 5min.2015-05-04_0830
Newest Snapshot Timestamp: 05/04 08:32:57
Exported Snapshot: 5min.2015-05-04_0830 Exported Snapshot Timestamp: 05/04 08:32:57
Healthy: false
Unhealthy Reason: Transfer failed.
Constituent Relationship: false
Destination Volume Node: cluster-01
Relationship ID: 003d8e96-f25a-11e4-bbdf-123478563412
Transfer Type: -
Transfer Error: -
Current Throttle: -
Current Transfer Priority: -
Last Transfer Type: update
Last Transfer Error: Destination was previously used as the destination of an XDP relationship. Using an XDP destination volume as the destination volume for a DP relationship is not supported.
Last Transfer Size: -
Last Transfer Duration: -
Last Transfer From: vs1_test:compress_test Last Transfer End Timestamp: 05/04 08:41:14
Progress Last Updated: -
Relationship Capability: 8.2 and above
Lag Time: 0:8:20
SnapMirror Policy: DPDefault

• A DP relationship that is converted to an XDP relationship can be converted back to a DP relationship, IF the source and destination volumes still have Snapshots with the same instance and version UUIDs.