Rockbox UMS - iPod Mounted with "sync" option
▻ time dd if=usb_write_test_file of=/mnt/ipod/Data/usb_write_test_file
4000+0 records in
4000+0 records out
2048000 bytes (2.0 MB) copied, 110.994 seconds, 18.5 kB/s
real 1m51.587s
user 0m0.004s
sys 0m0.232s
Rockbox UMS - iPod Mounted without "sync" option
▻ time dd if=usb_write_test_file of=/mnt/ipod/Data/usb_write_test_file
4000+0 records in
4000+0 records out
2048000 bytes (2.0 MB) copied, 0.0171083 seconds, 120 MB/s
real 0m0.103s
user 0m0.000s
sys 0m0.016s