So are you using a real linux or virtual machine inside a windows? If you are running a real linux you might look what the dmesg command tells you after the phone boots the rescue image. There should be some lines about USB drives being detected, propably something like sdb (sdb1 sdb2 sdb3 ...) If that happens, then you can mount the drives by hand, for example: "mkdir n9_home; sudo mount /dev/sdb2 n9_home" and so on. Then again, you could boot of another rescue image that allows you to telnet into the device and do the exports from there.