You can use the FCCGVERIFY keyword on the CGCREATED command to validate the state of the FlashCopy® Consistency Group before thawing all the volumes. This will help you determine if the copies of the group of volumes are consistent. An error message is issued if the frozen state cannot be verified. Regardless of the verification result, DFSMSdss will proceed to thaw all the volumes in the designated logical subsystems.

For the verification volume, IBM recommends that you select the first source volume that was copied with FCCGFREEZE in the group. When the logical subsystems have different Consistency Group timer values, select the volume residing in the LSS with the smallest Consistency Group timer value, or select one volume from each LSS.