Upgrading Exchange Environment for fail-over\redundancy

Hello,

We are in the process upgrading our current exchange environment to provide for more flexibility, manageability, increased performance, etc...  I put this question up to take some advise and opinions, here are some details.

Current Config.

230 mailboxes, 70ish distribution lists, 500+GB DB size, 1 Exchange 2010 Server running on VMware, Server 2008 R2, Storage on P2000 SAN. RAID 10, SAS 300 Drives.  

We now have 3 hosts connected to the P2000 and have introduced a second enclosure with more SAS drives.  

We would like to do the following:

Split up the Database?
Multiple Exchange Servers for different roles spread across the three hosts. ?
How many DBs, different LUNS?  

Any other ideas you suggest?  

If you have questions for me, feel free to ask.
sXmont1j6Asked:
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lciprianionutCommented:
I would start with Exchange 2010 Server Role Requirements Calculator from https://gallery.technet.microsoft.com/office/Exchange-2010-Mailbox-Server-Role-
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sXmont1j6Author Commented:
I get that but I am looking for some real world recommendations. Not MS technet.   Any suggestions would be great
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Zacharia KurianAdministrator- Data Center & NetworkCommented:
Split up the Database?
Yes

Multiple Exchange Servers for different roles spread across the three hosts. ?
Prefer to have DAG

How many DBs, different LUNS?
 Do you have enterprise license for exchange? If so consider having DBs per department/OUs. Prefer to host each server on different LUN

Any other ideas you suggest?
 If you have budget , I would suggest to implement  Symantec Enterprise Vault for exchange  /Barracuda email Archiving. + Do you have any 3rd party SPAM filtering appliances?

The link provided by @lciprianionut , is a great tool to start with.

Zac.
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