A friend has asked for some informal advice about upgrading a data archive system based around an EMC VNX 5100. It is configured with an external drive enclosure filled with 3 TB SATA drives, so it's not a performance oriented system - more bulk entry-level online storage.
What are the upgrade options?
My understanding is that I can just add another DAE configured with drives. Another shelf of 3 TB drives would be OK, but given data growth expectations, I was wondering whether 4 TB drives are available or suitable. The plan would be to add 8 drives (in RAID6 + spare) initially, and then as demands increase fill the shelf with another 7 drives in RAID6.
In the more distant future, it is possible that the 5100 might need upgrading, are the V3 DAEs/drives compatible with the 5200 series?