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Re: [dm-devel] DM_snapshot_cow filesystem (dmsetup create snapshot)



On Sat, Oct 29, 2011 at 4:49 PM, Alasdair G Kergon <agk redhat com> wrote:
markmc did some code that shows how to read the format a few years ago here:
http://people.gnome.org/~markmc/code/merge-dm-snapshot.c

Otherwise look at dm-snap-persistent.c in the kernel tree.

Alasdair

Users can easily exhaust a LiveUSB snapshot overlay by writing
too many changes to the OS filesystem, such as by performing
a yum update.

Would such an 'exhausted' overlay be amenable to some sort of
data recovery or forensics?

If so, how so; if not, why not?

(or suitable references)

Thanks,         --Fred

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