Hi Guys, The time has come, I knew it would, I held out for as long as possible, I resisted, I fought the urge, I tried to seek help... but alas, I have run out of space on my Norco RPC-4220 4RU server and need to expand. I have a SGI Rackable SE3016 (also know as SGI InfiniteStorage 1116) sitting in the garage that I picked up 18 months or so ago that I plan to use This SGI SE3016/1116 has a 6Gbps SAS expander built into it and I plan to run it to my server and connect it to a IBM BR10i SAS card, I will then move 10x 2TB Hitachi/Samsung drives from my server into it. This will be my first time using an expansion shelf, my question for all of you is what process should I be following when powering on my server and expansion shelf, should I power the expansion shelf before or after I power the server or does it not really matter? I am running ESXi 4.1 with a Solaris VM and I use ZFS, if I want to power my server without powering the expansion shelf I'm assuming the best practise would be to export the ZFS pool that's on the expansion shelf beforehand? and only import the pool when I choose to power on the expansion shelf? In my server I plan to use a couple of IBM M1015 SAS cards which can support 4TB drives and I will purchase 10x HGST CoolSpin 4TB Drives to use in the server, I'm a big fan of the Hitachi Drives as they have been very very good to me over the years. I have heard that some people have had issues putting 4TB drives into Norco 4220 Cases, I believe it had something to do with the power draw going through the chip on the backplane that managers the 'hot swap' function of the HDD trays, I personally never use the hot swap function so I'm going to just cross my fingers and hope the case handles the drives. Code: Current Server: Norco RPC-4220 4RU Server Case Inel S5520HC Server Board 2x Intel Xeon L5520 CPU 24GB ECC DDR3-1066 Tripple Channel RAM 2x IBM BR10i SAS Cards 2x IBM M1015 SAS Card 5x SAMSUNG Spinpoint F3EG HD203WI 2TB 15x HITACHI Deskstar 5K3000 ML6OA580 2TB Anyone use to running expansion shelves your advice would be appreciated!