sfdisk [options] device …

常用選項:

-s [or --show-size]: 顯示一個分區的大小

-c [or --id]: 顯示或者修改文件系統類型ID

-l [or --list]: 顯示每個設備的分區表信息

-d [or --dump]: 同上，但是以一個格式化的方式輸出

-i [or --increment]: number cylinders etc. from 1 instead of from 0

-uS, -uB, -uC, -uM: 以扇面/塊/柱面數/MB為單位 顯示或形成報告

-T [or --list-types]:顯示所有已知的sfdisk能辨識的文件系統ID

-D [or --DOS]: 兼容DOS但是會浪費一點磁盤空間

-R [or --re-read]: 讓內核重新讀取分區表

-N# : 只改變分區的編號 #

-n : 修改但實際上並沒有保存到磁盤

-O file : 保存扇面修改並寫入分區表文件

-I file : 重新恢復修改的扇面

危險的選項:

-g [or --show-geometry]: print the kernel’s idea of the geometry

-G [or --show-pt-geometry]: print geometry guessed from the partition table

-x [or --show-extended]: also list extended partitions on output

or expect descriptors for them on input

-L [or --Linux]: do not complain about things irrelevant for Linux

-q [or --quiet]: suppress warning messages

You can override the detected geometry using:

-C# [or --cylinders #]:set the number of cylinders to use  //設置要使用的氣缸數

-H# [or --heads #]: set the number of heads to use   //設置要使用的磁頭數

-S# [or --sectors #]: set the number of sectors to use   //設置要使用的扇區數

柱面大小=512*256(磁頭數)*64(扇區)

eg.

#!/bin/sh

export LANG=C

export LANGUAGE=en

device="/dev/mmcblk0"

PC_HIBERNATE=32

PC_ROOTFS=112

PC_PRODUCT=32

PC_DATA=224

PC_LOG=32

PC_VR=150

PC_BACKUP=16

PC_MAP=3000

PC_EXTEND=$((${PC_DATA}+${PC_LOG}+${PC_VR}+${PC_BACKUP}+${PC_MAP}))

PC_TOTAL=$((${PC_HIBERNATE}+${PC_ROOTFS}+${PC_PRODUCT}+${PC_EXTEND}))

FORMAT_P9=1

FMT_HIB="0xA0"

FMT_FAT="0x0C"

FMT_LINUX="0x83"

FMT_EXTEND="0x05"

if [ -e "/dev/mmcblk0p9" ]; then

echo "/dev/mmcblk0p9 is exist"

FORMAT_P9=0

fi

execute ()

{

$* >/dev/null

if [ $? -ne 0 ]; then

echo

echo "ERROR: executing $*"

echo

exit 1

fi

}

#echo "************************************************************"

#echo "*         THIS WILL DELETE ALL THE DATA ON $device          "

#echo "*                                                          *"

#echo "*         Press to confirm....                     *"

#echo "************************************************************"

#read junk

{

echo ,${PC_HIBERNATE},${FMT_HIB},-

echo ,${PC_ROOTFS},${FMT_LINUX},-

echo ,${PC_PRODUCT},${FMT_LINUX},-

echo ,${PC_EXTEND},${FMT_EXTEND},-

echo ,${PC_DATA},${FMT_LINUX},-

echo ,${PC_LOG},${FMT_LINUX},-

echo ,${PC_VR},${FMT_LINUX},-

echo ,${PC_BACKUP},${FMT_LINUX},-

echo ,${PC_MAP},${FMT_LINUX},-

} | sfdisk -D -H 255 -S 63 -C ${PC_TOTAL} ${device}

echo "Formatting ${device}p2"

execute "mkfs.ext4 -L rootfs -b 4096 -j ${device}p2"

execute "tune2fs -c 0 -i 0 ${device}p2"

echo "Formatting ${device}p3"

execute "mkfs.ext4 -L product -b 4096 -j ${device}p3"

execute "tune2fs -c 0 -i 0 ${device}p3"

echo "Formatting ${device}p5"

execute "mkfs.ext4 -L external -b 4096 -j ${device}p5"

execute "tune2fs -c 0 -i 0 ${device}p5"

echo "Formatting ${device}p6"

execute "mkfs.ext4 -L log -b 4096 -j ${device}p6"

execute "tune2fs -c 0 -i 0 ${device}p6"

echo "Formatting ${device}p7"

execute "mkfs.ext4 -L vr -b 4096 -j ${device}p7"

execute "tune2fs -c 0 -i 0 ${device}p7"

echo "Formatting ${device}p8"

execute "mkfs.ext4 -L backup -b 4096 -j ${device}p8"

execute "tune2fs -c 0 -i 0 ${device}p8"

if [ $FORMAT_P9 -eq 1 ];then

echo "Formatting ${device}p9"

execute "mkfs.ext4 -L map -b 4096 -j ${device}p9"

execute "tune2fs -c 0 -i 0 ${device}p9"

else

echo "FORMAT_P9=${FORMAT_P9},skip Formatting ${device}p9"

fi