/home/user # uname -a
Linux Nokia-N800-51 2.6.18-omap1 #3 Tue Feb 6 22:30:15 PST 2007 armv6l unknown

/home/user # df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/mtdblock4            2048      2036        12  99% /mnt/initfs
none                       512        64       448  13% /mnt/initfs/tmp
/dev/mtdblock4          257536     89892    167644  35% /
none                       512        64       448  13% /tmp
none                      1024        60       964   6% /dev
/dev/mmcblk1p1         3971584       192   3971392   0% /media/mmc1
/dev/mmcblk0p1          122742    114688      8054  93% /media/mmc2
/home/user # time dd if=/dev/mmcblk0 of=/dev/null bs=16384 count=10000
7688+0 records in
7688+0 records out
real    0m 16.32s
user    0m 0.00s
sys     0m 0.75s
/home/user # time dd if=/dev/mmcblk1 of=/dev/null bs=16384 count=10000
10000+0 records in
10000+0 records out
real    0m 21.03s
user    0m 0.00s
sys     0m 0.42s