VSS How?

[Guest UselessUser]

Hi all,

 

I am trying to work out how VSS works in detail.. I did post a similar post

in the Exchange forum but have not had a response so am hoping that someone

here may know...

 

As far as I understand it.. software wise a copy on write solution is

used... So when a backup is scheduled, VSS creates a map of the disk and

pauses all i/o to the disk, once the map is created it allows i/o and allows

any changes to be made to the disk, whilst copying the original contents of

the disk to the diff area.

 

My question is what does ntbackup do now! Does it attempt to create the

backup from the diff area and then read any unchanged parts from the original

disk? Also how does this work with Exchange?? Really quite mystified at

this...