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I am running through the calculator worksheet for Exchange 2010 and trying to figure out exactly what I will need.<br />
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I have run the analyzer on my current Exchange environment and know the size that is needed for the Exchange databases. However I also see that it is requiring a lot of space for restores. <br />
<br />
I will be using NetBackup for Exchange backup. Will I need a seperate recovery LUN in order to perform a recovery for all of the databases on exchange, or can I make it just large enough for one database to be recovered?
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I am running through the calculator worksheet for Exchange 2010 and trying to figure out exactly what I will need.

I have run the analyzer on my current Exchange environment and know the size that is needed for the Exchange databases. However I also see that it is requiring a lot of space for restores. 

I will be using NetBackup for Exchange backup. Will I need a seperate recovery LUN in order to perform a recovery for all of the databases on exchange, or can I make it just large enough for one database to be recovered?

calculating space requirements for Exchange 2010

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

The term "Backup" means the methods and processes involved to copy computer data (system data as well as application data) to media other than the ones where the data originally live (disk, tape, optical, cloud). "Restore" in turn means the methods and processes involved in data recovery, i. e., bringing back copied computer data to their original location. Backup/Restore primarily serves as a means of protection against data loss, be it due to disaster, corruption or sabotage. It can also be used for recovering data from an earlier point in time and even for cloning machines or applications. There is a wide variety of backup/restore software available, from expensive commercial products to free or open source tools.

Storage Software

Disaster Recovery is the planning for and creation of policies and procedures related to the resumption or continuation of an organization's functions following a catastrophic event. The term is most frequently used in relation to failure of networks, but DR preparations also include other business systems and personnel considerations.