Ubuntu – Files disappeared in ntfs partition using Ubuntu 11.10

Try running a file system check in Windows7 on that partition. Hopefully the lost files will magically reappear afterwards.

If you hibernate windows (or purpose or because of power-saving), then use ubuntu to store files on the NTFS partition, and then boot up windows, Windows thinks the disk was corrupted while it was in hibernate and "fixes" anything different. After that loging back into ubuntu just confirms that the files have in-fact been deleted.

Also I have seen that windows 7 may do a chkdsk after it installs updates on shudown when you bring it back up windows does extra tasks related to installing updates, so be careful not to boot into ubuntu after shutting down from updates. http://www.linuxquestions.org/questions/linux-newbie-8/windows-chkdsk-deletes-files-written-by-ubuntu-on-an-ntfs-partition-913606/

Yes even on a shared partition seprate from the windows partition and take care even with fat partitions (usb drives).

Sources, https://superuser.com/questions/211079/what-do-i-have-to-take-care-of-when-hibernating-both-ubuntu-and-windows-dual-bo/211175#211175 , https://superuser.com/questions/39532/hibernating-and-booting-into-another-os-will-my-filesystems-be-corrupted

Edit: I was looking through the widows site to try and find if they detailed the hibernate process, but this sounds interesting http://msdn.microsoft.com/en-us/library/dd143253(v=winembedded.5).aspx , It seems at best the write caching from the harddrive is being saved to memory, then being written after bringing the drive back up, this may mean that the files can't be recovered, because it's not "deleting" as in removing the first letter of the file so the system does not see it, but actually overwriting large areas of data that have been cached. Needs to be looked into more.