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enabling volume shadow copy

Posted on 2012-04-10
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Last Modified: 2012-04-10
We need to enable VSS on a windows 2003 box so that we can backup open files.  We have a 260 GB drive and there is only about 30 GB free.  My question is what effect will enabling VSS have on the system as far as performance and drive space.  How much space is required for VSS?

Thanks.
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Question by:tiptechs
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11 Comments
 
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Expert Comment

by:Geodash
ID: 37827823
It depends on your amount of data and how much you want to keep and how many timers a day to run VSS. The big question, how many days do you want to retain? I keep short amounts for VSS, like 2 days. It should not have any performance drawbacks. You can set 1 or 2 days 1 or 2 times a day, come back in 2 days and see how much data is consumed. It should be relatively small with only a couple days worth.
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Author Comment

by:tiptechs
ID: 37827831
When you first set it up.  Does it take a snapshot of all the files or is it only related to files that are open?

Thanks.
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Geodash earned 500 total points
ID: 37827836
I would start 2 times a day, for 2 days...as long as you have good "real" backups.

I do mine at at 0900 and 1300 every day and only hold 2 days worth. VSS is not designed as a "back-up" system for long term, but for quick restores.
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LVL 9

Expert Comment

by:Geodash
ID: 37827843
It takes a snapshot of everything the first time ran. If you have other drives, you can set VSS to take the snapshots of one drive and put them on another.
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Expert Comment

by:Geodash
ID: 37827846
You can also set a maximum you want the VSS's to consume. It will delete previous VSS's as it creates new ones.
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Author Comment

by:tiptechs
ID: 37827858
Thanks Geodash.
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Expert Comment

by:Geodash
ID: 37827866
Any time, good luck and let me know how it goes.
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Author Comment

by:tiptechs
ID: 37828515
Geodash.   How do you set it to only hold 2 days worth of shadow copies ?    Also, will it create a folder to store the shadow copies in?   I enabled VSS and specified an external drive as the storage location.  I didn't notice any new folders or the drive space decreasing when I started the VSS.  

Thanks again.
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LVL 9

Expert Comment

by:Geodash
ID: 37828577
It creates a folder but it is hidden. You have to show all hidden folders to see it. You will notice the diskspace going down if you leave the folder hidden. Also, did you manually create the first copy?

To just hold 2 days worth, I shrunk the maximum size that VSS could use on the drive until it worked for my amount of data. You may need to increase or shrink your allocated VSS space to allocate for only keeping 2 days worth. If it hits its limit, it will delete the oldest copies first.
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Author Comment

by:tiptechs
ID: 37828584
Thanks again.    Appreciate all the help.
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Expert Comment

by:Geodash
ID: 37828595
No Problem! Always here to help
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