Question about volume shadow copy

[club]

If I go into the properties of any folder or file, and then to the Restore Previous Versions tab, I have several snapshots to choose from. I thought this was a feature of the Volume Shadow Copy service
( Shadow Copy - Wikipedia, the free encyclopedia )

however, when I look at my list of services, via services.msc, the "volume shadow copy" service is set to Manual start, and is currently Stopped. If it's not running, how is it I have these "previous versions" snapshots? I assumed if the service isn't running, there would be no snapshots being captured.

I'm not complaining, only curious to learn. Can someone clarify please? TIA

 

[richc46]

Shadow copy is not running all the time. It is controlled by the task scheduler. A picture is taken about once a week. You can go back to any picture. If it is not time for the picture it is off. The task scheduler turns it on

(same in Windows 7)
System Restore - disk space - Vista Forums

and

http://www.sevenforums.com/tutorials/335-system-protection-change-disk-space-usage.html

 

[logicearth]

however, when I look at my list of services, via services.msc, the "volume shadow copy" service is set to Manual start, and is currently Stopped. If it's not running, how is it I have these "previous versions" snapshots? I assumed if the service isn't running, there would be no snapshots being captured.

I'm not complaining, only curious to learn. Can someone clarify please? TIA

It runs when it needs to. Thats the secret.

 

[karlsnooks]

Just for background info, here's some info behind some of the Win 7 disk usage decisions, including system restores.
Disk Space - Engineering Windows 7 - Site Home - MSDN Blogs

 

[club]

But I thought if a service is set to "Manual" start it will never run on it's own, ever.

For example, here's a screenshot of the VSS service from both 7 and XP machines of mine:
http://www.neoteric.us/images/vss.jpg

They are identical. So why on XP, when I go into the "Previous Versions" tab of any folder or file's properties there are never any snapshots taken, ever? But it does happen on 7. What's the difference... or why does it run on 7 but didnt on XP?

 

[logicearth]

Errr well Windows XP doesn't have Previous Versions...only System Restore.