write protect/write redirect/kios mode

Hey,

I LOVE snapshots in virtualmachines and think it would be awesome t
have something like this for my main windows install.

Anyone know of any hardware/software to redirect writes to anothe
drive/file/memory/hardware?

Or hardware to write protect a drive for kios's (i found some onc
befor the reverted all changes on shutdown, but cant find it anymor
><)

I know VSS(virtual shadow copy service) has a function to redirect o
write and wondering if i might be able to use that :/

It will just make everything cleaner, and give alot of flexiblity t
setting up many setups with branching incremental backups


So anyone have any ideas? like the idea

--
osaru
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