LINUX SD卡分区和格式化实例

把SD卡插入设备

# fdisk /dev/mmcblk0

The number of cylinders for this disk is set to 1914368.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)

Command (m for help): p

Disk /dev/mmcblk0: 62.7 GB, 62730010624 bytes
4 heads, 16 sectors/track, 1914368 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

        Device Boot      Start         End      Blocks  Id System

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-1914368, default 1): Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-1914368, default 1914368): Using default value 1914368

Command (m for help): t
Selected partition 1
Hex code (type L to list codes): L

 0 Empty                  1b Hidden Win95 FAT32     9f BSD/OS                
 1 FAT12                  1c Hidden W95 FAT32 (LBA) a0 Thinkpad hibernation  
 4 FAT16 <32M             1e Hidden W95 FAT16 (LBA) a5 FreeBSD               
 5 Extended               3c Part.Magic recovery    a6 OpenBSD               
 6 FAT16                  41 PPC PReP Boot          a8 Darwin UFS            
 7 HPFS/NTFS              42 SFS                    a9 NetBSD                
 a OS/2 Boot Manager      63 GNU HURD or SysV       ab Darwin boot           
 b Win95 FAT32            80 Old Minix              b7 BSDI fs               
 c Win95 FAT32 (LBA)      81 Minix / old Linux      b8 BSDI swap             
 e Win95 FAT16 (LBA)      82 Linux swap             be Solaris boot          
 f Win95 Ext'd (LBA)      83 Linux                  eb BeOS fs               
11 Hidden FAT12           84 OS/2 hidden C: drive   ee EFI GPT               
12 Compaq diagnostics     85 Linux extended         ef EFI (FAT-12/16/32)    
14 Hidden FAT16 <32M      86 NTFS volume set        f0 Linux/PA-RISC boot    
16 Hidden FAT16           87 NTFS volume set        f2 DOS secondary         
17 Hidden HPFS/NTFS       8e Linux LVM              fd Linux raid autodetect 
Hex code (type L to list codes): b
Changed system type of partition 1 to b (Win95 FAT32)

Command (m for help): p

Disk /dev/mmcblk0: 62.7 GB, 62730010624 bytes
4 heads, 16 sectors/track, 1914368 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

        Device Boot      Start         End      Blocks  Id System
/dev/mmcblk0p1               1     1914368    61259768   b Win95 FAT32

Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table

# mkdosfs /dev/mmcblk0p1 

参考：http://blog.csdn.net/yangzhongxuan/article/details/9342533

linux 下格式化 SD卡
分类： ubuntu 2013-07-16 14:29 1167人阅读 评论(0) 收藏 举报
在linux下面给sd卡分区，格式化是非常轻松的。
我安装的系统是ubuntu10.04。
sd卡插上之后，自动mount了。
所以，第一步，umount。
$sudo -i 
输入自己的密码取得root权限。
# mount
可以看到最后一行的设备号
/dev/mmcblk0 on /media/60C5-3EC0 type vfat (rw,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000,shortname=mixed,dmask=0077,utf8=1,flush)
umount这个sd卡
# umount /dev/mmcblk0
下面上场的是fdisk工具。
# fdisk /dev/mmcblk0
fdisk命令都是非常简单的。
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').


Command (m for help): m
Command action
a   toggle a bootable flag
b   edit bsd disklabel
c   toggle the dos compatibility flag
d   delete a partition
l   list known partition types
m   print this menu
n   add a new partition
o   create a new empty DOS partition table
p   print the partition table
q   quit without saving changes
s   create a new empty Sun disklabel
t   change a partition's system id
u   change display/entry units
v   verify the partition table
w   write table to disk and exit
x   extra functionality (experts only)
先P，看看sd卡的分区现状。
然后d，删除原分区
n，创建分区


Command (m for help): n
Command action
e   extended
p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-62528, default 1): 1
Last cylinder, +cylinders or +size{K,M,G} (1-62528, default 62528):  +1500M


t，指定分区类型，
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): L


0  Empty           24  NEC DOS         81  Minix / old Lin bf  Solaris        
1  FAT12           39  Plan 9          82  Linux swap / So c1  DRDOS/sec (FAT-
2  XENIX root      3c  PartitionMagic  83  Linux           c4  DRDOS/sec (FAT-
3  XENIX usr       40  Venix 80286     84  OS/2 hidden C:  c6  DRDOS/sec (FAT-
4  FAT16 <32M      41  PPC PReP Boot   85  Linux extended  c7  Syrinx         
5  Extended        42  SFS             86  NTFS volume set da  Non-FS data    
6  FAT16           4d  QNX4.x          87  NTFS volume set db  CP/M / CTOS / .
7  HPFS/NTFS       4e  QNX4.x 2nd part 88  Linux plaintext de  Dell Utility   
8  AIX             4f  QNX4.x 3rd part 8e  Linux LVM       df  BootIt         
9  AIX bootable    50  OnTrack DM      93  Amoeba          e1  DOS access     
a  OS/2 Boot Manag 51  OnTrack DM6 Aux 94  Amoeba BBT      e3  DOS R/O        
b  W95 FAT32       52  CP/M            9f  BSD/OS          e4  SpeedStor      
c  W95 FAT32 (LBA) 53  OnTrack DM6 Aux a0  IBM Thinkpad hi eb  BeOS fs        
e  W95 FAT16 (LBA) 54  OnTrackDM6      a5  FreeBSD         ee  GPT            
f  W95 Ext'd (LBA) 55  EZ-Drive        a6  OpenBSD         ef  EFI (FAT-12/16/
10  OPUS            56  Golden Bow      a7  NeXTSTEP        f0  Linux/PA-RISC b
11  Hidden FAT12    5c  Priam Edisk     a8  Darwin UFS      f1  SpeedStor      
12  Compaq diagnost 61  SpeedStor       a9  NetBSD          f4  SpeedStor      
14  Hidden FAT16 <3 63  GNU HURD or Sys ab  Darwin boot     f2  DOS secondary  
16  Hidden FAT16    64  Novell Netware  af  HFS / HFS+      fb  VMware VMFS    
17  Hidden HPFS/NTF 65  Novell Netware  b7  BSDI fs         fc  VMware VMKCORE 
18  AST SmartSleep  70  DiskSecure Mult b8  BSDI swap       fd  Linux raid auto
1b  Hidden W95 FAT3 75  PC/IX           bb  Boot Wizard hid fe  LANstep        
1c  Hidden W95 FAT3 80  Old Minix       be  Solaris boot    ff  BBT            
1e  Hidden W95 FAT1
Hex code (type L to list codes): 6
Changed system type of partition 1 to 6 (FAT16)


这样就分好了第一个分区，并且指定了分区为fat16。
第二个，我试做分区为linux分区


Command (m for help): n
Command action
e   extended
p   primary partition (1-4)
p
Partition number (1-4): 2
First cylinder (48002-62528, default 48002): 
Using default value 48002
Last cylinder, +cylinders or +size{K,M,G} (48002-62528, default 62528): 
Using default value 62528


Command (m for help): t
Partition number (1-4): 2
Hex code (type L to list codes): 83


好了，看看成果。


Command (m for help): p


Disk /dev/mmcblk0: 2048 MB, 2048917504 bytes
4 heads, 16 sectors/track, 62528 cylinders
Units = cylinders of 64 * 512 = 32768 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x6f20736b


Device Boot      Start         End      Blocks   Id  System
/dev/mmcblk0p1               1       48001     1536024    6  FAT16
/dev/mmcblk0p2           48002       62528      464864   83  Linux


好了，把分区信息写入磁盘。


Command (m for help): w
The partition table has been altered!


Calling ioctl() to re-read partition table.


WARNING: If you have created or modified any DOS 6.x
partitions, please see the fdisk manual page for additional
information.
Syncing disks.


下面开始格式化。
首先是fat16分区
#mkdosfs  /dev/mmcblk0p1
然后是linux分区
#mkfs.ext3 /dev/mmcblk0p2


完成之后，取出sd卡，再安装上去，linux系统已经自动识别了两个分区，可以用了。
放到手机里面去吧。