I've flashed my N900 a few times... all my data in MyDocs was still there..only apps were deleted

i think I used this command in flasher(without -R):

Run the following command (TIP: Do not include '-R' if you are flashing EMMC as well, see below):
flasher-3.5.exe -F RX-51_2009SE_2.2009.51-1_PR_COMBINED_MR0_ARM.bin -f -R