UPDATE! It appears it was caused by the mismatched firmware versions.  Once I updated the firmware on the Default pool array, I was able to move the volumes between the pools. 
 I have (2) PS6000 arrays in a group.  One array makes up my default storage pool.  The second array I just added and created a new pool (maint).  My default pool is RAID 5.  My maint pool is RAID 6.  I'm trying to move a volume from my default pool to my maint pool.  Everything seems to behave normally but the volume never makes any progress toward completion of the move.  The GUI reports that the volume is moving and shows the status as in-progress but the percentage completes stays at zero.  I am able to cancel the move and everything goes back to normal.  I can then attempt the move again but the results are the same. My Default pool has 1.41 TB free space and 3.05 TB reserved for volumes.  My Maint pool has 11.34 TB free space. My Default pool array has only one I/O module.  My maint pool array has two I/O modules. My maint pool array shows 1 packet error on one of the interfaces.  I'm not sure how to clear this. I am unable to find any errors that indicate why the volume will not move. Also, Default array is running firmware 5.2.6, Maint array is running 6.0.7. Any ideas or help would be greatly appreciated. 
Equallogic volume refusing to move storage pools