Solutions needed for exchange 2003 DR

Hi,
we have exchange 2003 enterprise, 90 GB database size, we do a daily datastore backup and system state using retrospect 7.5.
We need to have a max recovery of 2 hours for the following;
Corrupted database.
corrupted windows.
Failed hardware.

We have a stand by server on a VM, can we install exchange on it with the disaster recovery switch, or the live server has to fail beforehand because we have to give the stand by server its name and ip?
would this be the best approach for hardware failure, or can you suggest anything that you see would be better.
Shando1971Asked:
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Steve BottomsSr Network AdminCommented:
Given your need for 2 hour max downtime window the only approach i would take would be to set up a DAG.  Upgrade to Exchange 2013, get the DAG setup, and you'll have virtually zero downtime for your users.

Steve

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Shando1971Author Commented:
So the DAG would be a group database and it will have 2 servers on it, one active and one passive?
are the 2 servers will be syncing on specific intervals (every 5 min) and if a corruption occurs or the primary server goes down the passive server will kick in automatically?
can you please shed a little more details?

anything for the current time being until we upgrade for example dial tone to get the email flow until restore or repair, DAG, etc..

thanks..
Shando1971Author Commented:
No answers to the rest of my questions.
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Windows Server 2003

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