Format SD card with /dev/sdX style card reader

format_sd.sh

#!/bin/sh

if [ ! "$1" = "/dev/sda" ] ; then
	DRIVE=$1
	if [ -b "$DRIVE" ] ; then
		dd if=/dev/zero of=$DRIVE bs=1024 count=1024
		SIZE=`fdisk -l $DRIVE | grep Disk | awk '{print $5}'`
		echo DISK SIZE - $SIZE bytes
		CYLINDERS=`echo $SIZE/128/32/512 | bc`
		echo CYLINDERS - $CYLINDERS
		{
		echo 4,32,0x0C,*
		echo 36,,,-
		} | sfdisk -D -H 128 -S 32 -C $CYLINDERS $DRIVE
		mkfs.vfat -F 32 -n "boot" ${DRIVE}1
		mke2fs -j -L "rootfs" ${DRIVE}2
	fi 
fi