First depending on the firmware, if the new drives are dell drives they will be rejected by the frimware.   Two.  Assuming the 2TB drives are OK, there's a much easier way that won't require that you reconfigure your DR array.   1.)  Pause replication.  2.)  Shutdown the DR array.  3.)  Power offf the DR array and remove and package up the DR drives, but leave them at DR site.  4.)  Bring DR chassis w/o drives to primary site.  5.)  Cable up DR chassis 6.)  Shutdown the servers to primary site.  7.)  Shutdown the Primary array.   8.)  Remove drives from Primary site chassis and install those drives in empty DR chassis.  9.)  Power back up and verify it came back online OK.  10.)  Install new 2TB drives into the primary chassis.  11.)  Power up and add that to the primary group.  12.)  Add the 2TB array into its own pool. 13.)  Create the RAID6 RAIDset and let it finish building.   Make sure all network ports are configured and up.  14.)  Merge the pools, and the data will start striping to the new member.   15.)  Once you see data is moving OK to the new member, select the "old" member, the one in the DR chassi and move that member to the temp pool.  16.)  Once all the data is migrated,  reset the DR chassis array.  17.)  Remove the drive from the DR chassis.  18.)  Move chassis back to DR site.  Put drives back in and power up.  19.)  Re-enable replication  Regards, 
Hello I have two PS5000E SANs.  One is production and the other is offsite and contains replicas only.  I have to increase capacity on the production SAN so I will be replacing all 16 drives with 2TB drives, and I also want to change the RAID level from 5 to 6. I don't have support with Dell anymore so instead of borrowing a SAN from a rep, I plan to use the offsite SAN to help me with the process and I'm ok with not having DR for the few days that this will take.  I have backups. I think that my plan is sound but I would like to hear from an expert before I go ahead with this.  What I intend to do is: Am I doing this right?  Is there an easier way?  Looking forward to your replies. Curt
Replacing all hard drives