The primary system changes and maintains the status of the P-VOL and is responsible for keeping the P-VOL and its S-VOL synchronized. The secondary system maintains the status of the S-VOL.
- The primary system can change the status of the P-VOL and S-VOL.
- The secondary system can change the status of the S-VOL but not the P-VOL. When an operation is performed from the secondary system, the primary system detects a status change in the S-VOL and then changes the P-VOL status accordingly.
- The status indicates the state of the volume or pair:
- When volumes are not assigned to TrueCopy, these are unpaired volumes (SMPL).
- When an initial copy operation starts pair creation, the primary system changes the status of the P-VOL and S-VOL to COPY. When the initial copy operation is complete, the primary system changes the status of both volumes to PAIR.
- When you split a pair, the system changes the status of the P-VOL and S-VOL to PSUS.
- When a pair is suspended due to an error condition in the primary system, the primary system changes the P-VOL and S-VOL status to PSUE, if possible.
- When a pair is deleted from the primary system, that system changes the status of the P-VOL and S-VOL to SMPL.
- When a pair is deleted from the secondary system, that system changes the S-VOL status to SMPL, and the primary system detects the pair release (when the path is in normal status) and changes the P-VOL status to PSUS.