MBR apparently overwritten!

[Petr Janda <elekktretterr@xxxxxxxxxxxxxx>]

Hey,

Something freaky has happened. My 3rd disk's partitions are gone. I had a 1) 
HURD 2) Windows 3) DragonFly. Now wanting to play some games i went to boot 
WIndows and i found out the DragonFly partition is now covering the whole 
disk. Does MBR have a modification timestamp? If yes, how to retrieve it? If 
no, what can i do?