This may be a little off topic, but I think i'm in the ballpark
scenario
moving from X86 to X64
both Linux (2.6) x64 and open solarus x64 installed to a separate device
an additional device (hardrive internal) is mounted for data storage via NTFS file system.
Removal of data storage media and mounting that storage on a win32 system the system on boot reports an error with the file system ? and proceeds to run a chkdsk on the drive.
as my heart slows to a panicked rhythm, and I ponder what the arguments a for this chkdsk after several unknown errors roll by, the data on the drive is valuable and I do not look forward to spending several hours rebuilding the env's set up on this disk I quickly come to the conclusion the a hard stop is my best option as Linux x64 has no issues in mounting this drive and I can safely get the latest updates off the drive before I start gussing on the out come of some action.
boot fedora 9 mount ntfs dev - will not mount force mount successful WHEWWWW!!! backup needed data, file system appears to function as it should in this env??? unmount device remount device on win32 system system comes up without an issue no log errors ? no warnings run chkdsk on device runs without a hitch ? do file system maintenance disk appears good to go? check recheck check reboot reboot reboot (ahhh gota love windows :~| )
move the disk over to a solaris system works fine? Get data i need unmounted device install back in win box boot = HARD ERROR UNKNOWN
Heck all my ducks are in a row (the featherless kind) system reboots without intervention and comes up no errors or entries in the event logs pertaining to this device ?

My question is does mounting this device change anything on this device as it should not alter the device in any way

I have never had this issue on an x32 linux, openbsd, mandrake, suse, dsl freebsd, etc etc etc system?

Sorry about the long winded post...
One more titbit if info
The device was in a machine that fedora 9 was installed upon with a encrypted file system. this device was not mounted during the install.

drive is a sata drive
mobd = asus P5ld2 (intel)