I will be shortly planning and building an exchange cluster for approximately 2000 users.
I would like to provide hot failover so am looking along the SAN cluster model.
Were looking at a budget of around £8000 for the SAN initially, then about a further £17000 for the servers
Here is my current thinking on the project
The current hardware I am looking at is a HP MSA 1500 controller
This will be a raid5 array for the datastore (expandable as needs be) and either raid10 or 01 for transaction logging comprising of six disks to provide performance,
This will then be the shared datastore for four main servers and a hotfailover one.
Basically, Im asking you to review the above, provide other solutions, give comments on selected hardware, raid configuration etc., whether this would scale well (we`d like a good user experience and provide future proofing up to at least 3000 users)
Any views at all, have intially put up 500 points for this question and will share points based on how useful replies were.
Thanks in advance for any replies