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Old 03-07-2008, 03:04 PM
corby corby is offline
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Join Date: Mar 2008
Posts: 25
TM and SD simultaneously backing up the same file


I'm a new Mac user and just started using both Time Machine and SuperDuper.

I read the FAQ and sucessfully did a Time Machine backup and a SuperDuper backup "along side" the Time Machine backup. So far, so good.

I'm using a MacBook, so during day to day use, it won't be connected to my external backup drive.

My plan is to connect to the drive periodically to do my backups (a few days per week).

I also use VM Fusion, which creates pretty large virtual machine files.

My question is this:
When I connect to the external backup drive, will there be any problem with Time Machine and SuperDuper both doing their backups simultaneously?

I'm concerned that the large files created by VM Fusion will take time to backup, and it might be the case where both programs will be trying to access those files at the same time.

Note: I've read from a number of sources that it's a good idea to exclude some large files from Time Machine, especially if they're frequently updated, because TM will need to make a new copy every time it does it's backups. (and manually back them up periodically).

I'm really not concerned about that because I won't be always connected to the drive, so I won't be backing up a new copy every hour, and I do want that file to be backed up whenever I do a backup.

So, do you think there will be a problem if TM and SD try to backup the same large file at the same time?



Last edited by corby; 03-07-2008 at 03:06 PM. Reason: clarify subject line
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