One other thing you might want to try BTW.
Instead of the rescue kernel&initramfs, you can downlload the latest ubiboot kernel which contains the integrated maintanance mode.

• Get it from here: http://www.swagman.org/juice/ubiboot...3.5_301013.tar
• Unpack the tarfile, and you will get the ubiboot kernel (zImage_2.6.32.54-ubiboot-02_301013)
• Boot your N9 with the kernel; "sudo flasher -k zImage_2.6.32.54-ubiboot-02_301013 -l -b"

Now, see if this gives you a better filesystem export.