Chapter 11. Advanced Copy Services 451
FlashCopy mapping states
At any point, a mapping is in one of the following states:
/SM590000Idle or copied
The source and target volumes act as independent volumes, even if a mapping exists 
between the two. Read and write caching is enabled for both the source and the target 
volumes. If the mapping is incremental and the background copy is complete, the mapping 
records only the differences between the source and target volumes. If the connection to 
both nodes in the I/O group that the mapping is assigned to is lost, the source and target 
volumes are offline.
/SM590000Copying
The copy is in progress. Read and write caching is enabled on the source and the target 
volumes.
/SM590000Prepared
The mapping is ready to start. The target volume is online, but is not accessible. The 
target volume cannot perform read or write caching. Read and write caching is failed by 
the SCSI front end as a hardware error. If the mapping is incremental and a previous 
mapping completed, the mapping records only the differences between the source and 
target volumes. If the connection to both nodes in the I/O group that the mapping is 
assigned to is lost, the source and target volumes go offline.
/SM590000Preparing
The target volume is online, but not accessible. The target volume cannot perform read or 
write caching. Read and write caching is failed by the SCSI front end as a hardware error. 
Any changed write data for the source volume is flushed from the cache. Any read or write 
data for the target volume is discarded from the cache. If the mapping is incremental and a 
previous mapping completed, the mapping records only the differences between the 
source and target volumes. If the connection to both nodes in the I/O group that the 
mapping is assigned to is lost, the source and target volumes go offline.
/SM590000Stopped
The mapping is stopped because you issued a stop command or an I/O error occurred. 
The target volume is offline and its data is lost. To access the target volume, you must 
restart or delete the mapping. The source volume is accessible and the read and write 
cache is enabled. If the mapping is incremental, the mapping is recording write operations 
to the source volume. If the connection to both nodes in the I/O group that the mapping is 
assigned to is lost, the source and target volumes go offline.
/SM590000Stopping
The mapping is copying data to another mapping. If the background copy process is 
complete, the target volume is online while the stopping copy process completes. If the 
background copy process is not complete, data is discarded from the target volume cache. 
The target volume is offline while the stopping copy process runs. The source volume is 
accessible for I/O operations.
Important: After an individual FlashCopy mapping is added to a Consistency Group, it can 
be managed as part of the group only. Operations such as prepare, start, and stop are no 
longer allowed on the individual mapping.