-------------------------------------------------------------------------------------------
Rockbox UMS Code writing test (2 Megabytes, straight to the device, no filesystem overhead)
-------------------------------------------------------------------------------------------
 ▻ time dd if=usb_write_test_file seek=81481328 of=/dev/sdb1 bs=1 count=2048000
2048000+0 records in
2048000+0 records out
2048000 bytes (2.0 MB) copied, 11.4601 seconds, 179 kB/s

real    0m11.508s
user    0m0.468s
sys     0m3.916s

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Apple Emergency Disk Mode writing test (2 Megabytes, straight to the device, no filesystem overhead)
-------------------------------------------------------------------------------------------
 ▻ time dd if=usb_write_test_file seek=81481328 of=/dev/sdb1 bs=1 count=2048000
2048000+0 records in
2048000+0 records out
2048000 bytes (2.0 MB) copied, 13.6215 seconds, 150 kB/s

real    0m13.714s
user    0m0.384s
sys     0m3.584s

-------------------------------------------------------------------------------------------
Apple Original Firmware writing test (2 Megabytes, straight to the device, no filesystem overhead)
-------------------------------------------------------------------------------------------
 ▻ time dd if=usb_write_test_file seek=81481328 of=/dev/sdb1 bs=1 count=2048000
2048000+0 records in
2048000+0 records out
2048000 bytes (2.0 MB) copied, 5.67416 seconds, 361 kB/s

real    0m5.715s
user    0m0.456s
sys     0m3.556s