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Exchange Offline Defrag

Posted by viralr on May 6, 2011

Exchange Offline Defrag ,Really needed ?

1) First thing you need to look is if you really need a defrag ?

Check the Event Id 1221 on the Mailbox Store and Public Folder store to make sure sufficient white space is available on the database

White Space (Recyclable Space) indicates how much space could be recovered by an offline defragmentation

White Space (Recyclable Space) means Exchange has carried out some routine maintenance on the Exchange database. Any old data that is past the delete thresholds has been deleted from the database.

The space it has left behind has then been consolidated, in to “white space”. The size of the database hasn’t changed – there is just some space within the database

http://www.msexchange.org/articles/Exchange-Databases-Disk-Consumption.html

2) Check the Event Id 1216 on the Mailbox Store and Public Folder store to check the Database Size

3) Make sure you have taken the complete Backup of Both the Exchange Database

4) Exchange offline Defrage Require 110% of Free Space to Defrage Exchange Store,

If Mailbox Store Database size is 60 GB then you need at least 70 GB of free disk space on the server

(Check Event Id 1216 for Database Size)

5) Make sure you have taken sufficient Down time to run offline defrag on exchange database

(4GB of Database Defrage Require 1 Hour to Complete (60 GB of Database Require Approx 15 Hours)

Refer the Article for Offline Defrage

http://technet.microsoft.com/en-us/library/aa998863(EXCHG.80).aspx

http://exchangeis.com/blogs/exchangeis/archive/2007/03/26/eseutil-a-quick-and-easy-tutorial.aspx

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