Best External RAID Controller for large Virtualization Move
Posted on 2011-10-24
Need some advice this time. I'm trying to write a proposal for a massive virtualizaton move for our medium size business. We have about 100 desktops and 20 servers running here, and we've already virtualized a few production servers onto ESXi 4.1.
I'm looking at asking the company to purchase some very heavy duty servers so we can virtualize pretty much everything. Those would look as follows:
Dell PowerEdge R815
128 GB RAM
4x 12 Core AMD Opteron 6172 Processors
SFP+ NIC with Transceivers
Then, we come to storage. I'd like to go this route:
Habey DAS DS-1280 (we currently use one of these, and I like it)
12 600 GB 6 Gbps 15k SAS Drives
LSI SAS Switch
That brings me to the big Q's: external RAID cards. Currently we're using the relatively cheap Highpoint 4322 to connect to our Habey DAS, and it works fairly well. If we're going to do such a large scale intiative, though, I'd like something more robust. We're talking about hosting up to 100 Desktop VMs on one host, and 20 Server VMs on another, all on a 10G backbone.
So, my Q's are:
- First, given the hardware specs I listed above, am I overextending by trying to host this many VMs on a given host? This is the kind of thing I'd like to demo first, but can't, because it would be too expensive to round up the hardware for a solid test run.
- Second, if the host hardware is good to go, what external RAID card would best facilitate communication between the DAS and the host?
I appreciate your comments and opinions, with a caveat: I don't need to hear that you think I should use Citrix, Hyper-V, etc. My questions are really hardware specific, not software.