Exchange GRT Restore from Tape Very Slow.

Paulo's picture
Paulo
August 3rd, 2007
Due to the well documented problems with duplicating Exchange GRT backups from Disk to Tape, we are currently doing a GRT straight to tape every day.
 
I restored from my GRT to tape backup for the first time the other day, and it took hours to restore 1 message! It must have taken a couple of hours to complete the staging process.
 
Is this normal? Our information store is 40GB.
 
Thanks
Paul.
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0 votes
Hywel Mallett's picture
Hywel Mallett
2 years 16 weeks ago

Yes, I believe it's normal. This is why GRT restores are recommended to be done from disk. If restoring from tape the entire backup must be staged first. Of course, this relies on you having enough free disk space to keep the backups lying around...
I'm sure there's an article on this in the BE Knowledgebase....

http://www.backupexecfaq.com

0 votes
D B 5's picture
D B 5
2 years 16 weeks ago

Paulo,
 
As stated, this is expected behavior and recommendation is to run to B2D (not counting the current issue with Duplicate to tape).
 
The actual reason for this is that a GRT backup to a B2D folder will keep the exchange database in a dynamic form, so it is read on the fly to do a restore.  This of course cannot be done to a tape device, so when doing a restore, the data is staged.  When it is staged, the data is changed from the tape format to the dynamic database format that the IMG folders use in B2D.  The actual restore takes a few seconds, the staging of the data though can take awhile depending on backup size.
 
Consider this a temporary issue though. Once the hot fix comes out for the duplicate to tape issue then you will be able to change to running the job to B2D and dupicating it to tape.  All your restores can then be done from B2D and thus eliminate the long staging process.
0 votes
StevenH's picture
StevenH
2 weeks 2 days ago

Does the above post suggest

Does the above post suggest that if you B2D your exchange IS - then duplicate to tape.... that you'll be able to restore from the duplicated tape without staging the entire Storage Group?

0 votes
CraigV's picture
CraigV
2 weeks 21 hours ago

Hi, The article I wrote below

Hi,

The article I wrote below details how to stage to disk if you don't know how too...

https://www-secure.symantec.com/connect/articles/restoring-exchange-or-individual-mailboxesitems-using-backup-exec-howto

If you find this is a solution, please mark it as such.

+2 (2 votes)