Hello,   No.  If you have a contract on the 6210's that will void them.  You can't swap parts around arrays.  Especially in this case as those older drives weren't qualified for the 6210.  The PS5000 was the first "Dell" model of the Equallogic SAN.   My suggestion is set up the PS5000's in their own group.  Run RAID6 and use them for non-critical storage though still back them up.  Some will tell you later it was critical data.      Some customers I've worked with have used host based replication to use these older units as additional backup of most critical data and use host replication during the day almost like a mirror.  (E.g.livesync or rsync, Vmware Replication, etc)    Regards,  Don   
Hi All At the moment I have 3 x PS6200 XV SAS units and they are working well, I have some older none supported PS5000xv units - my question is can I take the drives out of the and put them in a supportable SAN unit - if so which one - or is it just not worth the hassle?  It seems a shame to waste the 2 x PS5000 units as the drives are in good useable condition. Thanks   Eric    
Equallogic storage options - PS6200xv plus PS5000xv