A few Questions about backup

[lowspeed]

1) When does a VDI file get updated or written? it seems to not update until i shut the machine down.

2) You know of a good on the fly backup of VDI's ?


Thanks!

[vbox4me2]

VDI's are written to nearly all the time, the timestamp only changes when the vdi expands.
http://forums.virtualbox.org/viewtopic.php?f=1&t=40838