12-23-2008 01:49 AM
Setup is 12.5 rev 2213 on a windows 2008 32 bit standard, I'm testing backup of a new file server with the same OS.
A differential backup of some user home folders gave a throughput of 44 Mb/min.
Although the AOFO option is not selected on the job VSS is getting loaded and this is done as a snapshot diff. Other diffs on the same job (windows 2003 servers) don't load VSS.
If I disable the Volume Shadow Copy service on the 2008 file server the job throughput goes up to 462Mb/min.
Unfortunately with that service disabled I can't setup a job to do a system state backup.
Anyone know why 2008 calls VSS when 2003 doesn't need it, why it slows everything so much or how I can set up a full backup, with system state, and still get a decent speed?
thanks
01-06-2009 06:28 AM
I have exactly the same problem !!
have been struggling with slow backups of the C drive and when i disabled VSS the speed shot up a massive amount.
Obviously with VSS disabled several files fail and we cannot do a full backup.
There has to be a reason for this ? how can we get server 2008 to only use VSS when it needs it rather than for the whole job ???
01-26-2009 06:16 AM
I have just found knowledge base article 316763 (2 Jan 2009) http://seer.entsupport.symantec.com/docs/316763.htm
This states " For all backups of Windows 2008 and Vista, VSS will be used to backup all file data, regardless of the AOFO setting. " So totally stuffed if you are backing up 2008.
As file backup obviously works fine without VSS (and gives me 10 times the speed!) why am I forced to use it. So the only way to get full system backup is to turn VSS on only for the system state backup then off so I can do the file backups at a sensible speed.
This product truly sucks
07-08-2009 05:57 AM