rapsberry_1st

$ write_target=`df -h                  |
                grep 'NO NAME$'        |
                awk -F' ' '{print $1}' |
                sed -e 's/[a-z][0-9]$//g' -e 's/disk/rdisk/g'`

$ diskutil unmount `df -h                  |
           grep 'NO NAME$'                 |
           awk -F' ' '{print $1}'`



$ sudo time dd bs=1m \
               if=2012-12-16-wheezy-raspbian.img \
               of=${write_target}

#result#
	1850+0 records in
	1850+0 records out
	1939865600 bytes transferred in 93.960787 secs (20645481 bytes/sec)
  	     93.98 real         0.00 user         1.45 sys
#結構かかる

s/rapsberry/raspberry/