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wbadmin incremental backup to iscsi target (Windows 2012 server)

Posted on 2015-02-21
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Last Modified: 2015-02-26
I've successfully managed using the Windows Server Backup to backup 6TB of data to a 16TB iSCSI target but it keeps doing full backups. Unfortunately, this takes 3 days to complete so is practically useless. Is there a way to set it to do incrementals?

Also, probably linked but how can I do the same for backing up to an internal drive rather than a USB connected one as the same problem occurs. for some reason the backup always ends up being a full backup.

Why does wbadmin differentiate between internal and removable drives and is there a way to fake an internal drive as USB if wbadmin does indeed not like internal drives for backups?
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Question by:Dale303
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Cliff Galiher earned 2000 total points
ID: 40623554
In the backup properties, you can adjust the advanced settings. It isn't necessarily clear, but choosing "fast" will do incremental to dedicated backup drives (including internal and iSCSI) as long as WSB determines there is space and the last snapshot differential is small enough. The downside is you can't further control that logic. If you've already selected fast backups and the logic is deciding to do a full backup, you can't force incrementals (not even with USB.) WSB is a bare-bones solution and Microsoft expects and is relying on their partner ecosystem to provide more full-featured solutions to those businesses that want it.
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by:Dale303
ID: 40623580
Yes, this is not clear at all. Are the 'performance settings' completely independent the 'backup schedule' settings?
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by:Cliff Galiher
ID: 40623584
Yes.
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by:Dale303
ID: 40634198
OK Great. All working now. 3 days for full backup vs 17 mins for 'incremental'.

I discovered this little site on my travels. So are these 'incremental' backups I'm doing actually the 'fast differentials' explained here... http://www.wbadmin.info/articles/how-does-windows-server-2008-backup-work.html
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