Re: Re: What??
OK Im going to try and be polite here. (takes a deep breath)
You really really need to go and undertand how Exchange 2010 works.
I did not ask for war and peace on how great XIV was! What I asked was why would I pay for an XIV (in fact ANY storage array) rather than a DAS solution (please note that in a DAS solution we use equal to or better technology than you (Midline SAS and 6GB SAS in a fully redundant enterprise class architecture for a start (I digress however!)) when I will not gain anything (other than extra cost)
Im going to try and highlight some areas for you. (Not all, I dont have time)
"rebuild cause on your Staples DAS solution"
Exchange 2010 works with availability on the premise of mailbox copies these are effectively different LUN's presented to different servers but the same data on each one, this is the ONLY model of availability that you can use! A common approach these days is a single mailbox database to a single disk. If a disk fails, obviously that mailbox copy goes offline, however you have multiple other copies being served by different servers (so in fact you are protected against server failure as well) so a disk failure doesnt actually affect user performance as they merely get served by a different mailbox server. A rebuild then happens in the background away from the user between the servers (plus you probably have more than one copy so even multiple drive failures arn't an issue, what happens in yours if you have multiple drive failures in quick succession?) so zero impact with zero impact to response time (which actually cant be said for yours as at some point your array will have to dedicate cyles to rebuilding?).
"Even if you still don't like XIV for Exchange you must give some props for the management UI (which has no licensing fee to use nor a separate server requirement to implement)"
OK maybe Im not being clear. Even if the XIV is a good as you say, you still have to set up the server side AFTER you have set up the storage (so at least two interfaces to play with!). In a DAS model you just set up the server and away you go (which also simplifies troubleshooting as its all server side but I digress).
"So may I ask what type of Snapshot technologies, consistency groups for application integration does the Staples solution give the test/dev and back up teams?"
OK this is the bit where you show your ignorance (Im guessing your either a sales person (not presales) or product management?(Actually the bit about perfomance gave it away, you clearly dont understand what sequential perfomance means for a cahched array architecture)).
ALL of this is provided in the applciation itself it has ZERO understanding of any 3rd party implementation of this, so all you array is doing is providing raw space (you could use thin provisioning but I wouldnt recommend it if Exchange thinks it has space it WILL use it (not particularly a good idea if you overprovision!))!
Please, please please read this before coming back and posting
PS as a bit of a friendly dig at you have a look at Lefthands P4000 technology, you almost got your architecture as good but you forgot to think outside the box (no pun intended!!)