Just unpacked (2)4 GIG and (1)8 GIG Transcend cards for testing in the R-09. All cards immediately recognized with full capacity BEFORE format. Then in-deck (no USB) formatted the card, and checked for capacity; got identical OK results
R-09 has a Test Mode accessed by holding down Finder/Menu and Repeat buttons while turning on PWR. 12 selections allow some kind of minimal function of virtually all electrical audio/digital & button-switch input/outputs, the display, and internal-external memory, clock, USB control.
Menu Exiting requires selecting last #12 Factory Reset and pushing REC button, turn off power, and removing the AC adapter external powering to reset the deck to normal operation.
Rear deck slide switches should be set with left row in LEFT, and right row in RIGHT positions for audio function tests.
Selection of Tests from the menu requires holding down the Menu button, then navigating with the << or >> button
Of particular interest is test #2 with sub items Flash program check sum, SDRAM, Clock, M66592 (USB), and SD card test.
Without SD card, immediate-acting completion of first 4 sub items, and then indicates 'No Card' whereby testing quickly starts when inserting an SD card that if OK, menu goes on to next #3 ext mic test. Navigating back to #2 quickly repeats all 5 sub tests jumping again to #3 if all pass again.
8 GIG card tested OK at many times faster than full card format time, so doubt little more than short write/read function test, and card may require reformatting removing the test files before normal use. It would be interesting if known problem SDHC card tests OK or NOT with fast minimal function tests like this.
I'll post more after audio input recording many hours of test files at 24bit/44.1K rate.