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Exchange 2007 DBs dismounting

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  • Exchange 2007 DBs dismounting

    We have reached a 300GB limit on our exchange DB and it is dismounting. Over the last day I have moved about 50GB of mailboxes to a new store.

    Will that create 50GB of white-space on the original Store in which case everything will be ok now, or do I need to run a process to reclaim it back?

    I am thinking of the 2010 equivalent for removing soft deleted mailboxes after a mailbox move, whereby the mailbox remains in place in its original database as a deleteable copy. I am not certain that exists in Exchange 2007 though.

  • #2
    Re: Exchange 2007 DBs dismounting

    There is no hard limit on Exchange 2007 databases.

    The only limit would be a soft limit imposed by a registry entry. That registry entry can be removed or even deleted.

    Exchange 2007 works in the same way as Exchange 2003 - a process runs overnight to clear the space. This should be reflected by an event log entry indicating the amount of free (white) space in the database.

    To be sure, just change the registry entry to higher number to allow the database to stay mounted.

    Simon.
    --
    Simon Butler
    Exchange MVP

    Blog: http://blog.sembee.co.uk/
    More Exchange Content: http://exchange.sembee.info/
    Exchange Resources List: http://exbpa.com/
    In the UK? Hire me: http://www.sembee.co.uk/

    Sembee is a registered trademark, used here with permission.

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    • #3
      Re: Exchange 2007 DBs dismounting

      what sembee hasn't mentioned (and it might be because my understanding is wrong. I'd accept his thoughts over mine any moment of existance) is that deleting data from within a mailbox store doensn't decrease teh size of the store.

      what is DOES do, is release free space within the store and you can ssee this in relevant even logs (for 2003, it actually tells you under specifi event ids which i don't fully remmber, that store is XYZ size with ABC FRee.)

      but yea, just increase the size in the registry. that's the quick, easy way
      the other way is an offline defrag, or to move everything to another data store.
      Please do show your appreciation to those who assist you by leaving Rep Point https://www.petri.com/forums/core/im.../icon_beer.gif

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      • #4
        Re: Exchange 2007 DBs dismounting

        One thought to add: if the drive the DB resides on is out of space then you're still going to have issues.

        If this is the case then you're in a bit of a pickle since you would need the size of the used space in addition to the physical size of the store to either do an offline defrag or, better yet, move everything to a new mailbox store and delete the old one.
        Regards,
        Jeremy

        Network Consultant/Engineer
        Baltimore - Washington area and beyond
        www.gma-cpa.com

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        • #5
          Re: Exchange 2007 DBs dismounting

          Database size limits in Exchange post 2003 Sp2 are logical, not physical.
          Therefore if the limit is set to 300gb, then as long as the physical size, minus the white space comes to less than 300gb, you will fine.

          Offline defrag is rarely recommended, particularly for a database of 300gb, due to the extended downtime. I have never done an offline defrag on Exchange 2007 or higher.

          Simon.
          --
          Simon Butler
          Exchange MVP

          Blog: http://blog.sembee.co.uk/
          More Exchange Content: http://exchange.sembee.info/
          Exchange Resources List: http://exbpa.com/
          In the UK? Hire me: http://www.sembee.co.uk/

          Sembee is a registered trademark, used here with permission.

          Comment

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