1. Yes, replication is Firmware version dependent, not restricted by hardware, see the release notes. 2. On the DR side, simply add the new array to the group, then let the data span both members.  Then once the data has balanced accross both member, and it's completed, you can then remove the older array from the group, and use it however you want to. 3. When you add thePS4100 to the group, you specify the RAID policy, yes, RAID50 is supported. -joe
Hi all, my customer has 2 sites, Production and DR. In Production it has 1 PS5000X and 1 PS6000X, in DR 1 PS4000E. All storage has different groups. Equallogic Prod on site is replicating on DR site. Now the customer has just bought a new PS4100 that will substitute PS4000E in DR site, which will be installed in Production. The questions are: 1. Can I replicate PS5000X, PS6000X and PS4000E to PS4100? Is this a supportted replica configuration? 2. How can I substitute old storage PS4000E with new PS4100 without do a full replication? In other words, how can I move all data (mounted LUNs and replicated data) from old storage to new storage, without losing replication configuration? 3.Would like to configure RAID50 on PS4100 con  2 Tb nearline SAS disk, is this a supported configuration? Thanks  Angelo 
Introduction of new PS4100 with migration