Linux 磁盘管理_emmc 启动,怎么查看内核文件系统的分区大小-程序员宅基地

技术标签: 运维  linux  Android-入门教程  

linux 查看mmc分区_查看MTD,EMMC,MMC三种设备的分区_涂妞妞的博客-程序员宅基地

Android MMC/EMMC/MTD Partition Layout_weixin_34242819的博客-程序员宅基地

MTD
Memory Technology Device,内存技术设备,是用于访问memory设备(ROM、flash)的 Linux 子系统。通过proc文件系统查看mtd设备的分区情况:
cat /proc/mtd

EMMC
Embedded MultiMedia Card
分区信息可以从 /proc/emmc

MMC
MultiMedia Card
它的分区信息只能从 /proc/partitions 获得:


用户视角:目录

操作系统视角:磁盘 分区

软件版本:镜像文件

三者如何关联起来?


思路1(正着推,从磁盘分区找目录对应关系):

第一步,硬盘分区,使用如下命令获取:adb shell cat /proc/partitions

第二步,获取上述分区的名称:adb shell ls -l /dev/block/bootdevice/by-name

第三步,针对上述分区,查看对应的挂载点,从而跟用户视角的目录关联起来


思路2(反着推,从目录找磁盘分区对应关系):

  • /system:用户视角的目录名称
    • /dev/block/mmcblk0p46
      • system:操作系统视角的磁盘分区名称

第一步,利用adb shell ls 和adb shell mountpoint,判断哪些目录是挂载的

adb shell ls -l

adb shell mountpoint /system

第二步,利用adb shell mount,进一步建立 目录、

adb shell mount | findstr system

第三步,查询该分区的名称

adb shell ls -l /dev/block/bootdevice/by-name | findstr "\/dev\/block\/mmcblk0p46"


思路3:

软件版本有不同镜像文件,跟第二步分区名称可以对应起来,刷机时,将system镜像文件刷至system分区,同时system分区挂载点/system。从而,三者关联起来。


第一步:查看分区数

adb shell cat /proc/partitions

C:\>adb shell cat /proc/partitions
major minor  #blocks  name

 254        0     524288 zram0
 179        0   30535680 mmcblk0
 179        1       4096 mmcblk0p1
 179        2       4096 mmcblk0p2
 179        3       4096 mmcblk0p3
 179        4       4096 mmcblk0p4
 179        5       4096 mmcblk0p5
 179        6       4096 mmcblk0p6
 179        7       4096 mmcblk0p7
 179        8      16384 mmcblk0p8
 179        9      16384 mmcblk0p9
 179       10      16384 mmcblk0p10
 179       11       8192 mmcblk0p11
 179       12       8192 mmcblk0p12
 179       13       4096 mmcblk0p13
 179       14       4096 mmcblk0p14
 179       15       4096 mmcblk0p15
 179       16       4096 mmcblk0p16
 179       17       4096 mmcblk0p17
 179       18       4096 mmcblk0p18
 179       19      32768 mmcblk0p19
 179       20       4096 mmcblk0p20
 179       21      94208 mmcblk0p21
 179       22      65536 mmcblk0p22
 179       23      65536 mmcblk0p23
 179       24       4096 mmcblk0p24
 179       25       4096 mmcblk0p25
 179       26       4096 mmcblk0p26
 179       27       4096 mmcblk0p27
 179       28       4096 mmcblk0p28
 179       29       4096 mmcblk0p29
 179       30       4096 mmcblk0p30
 179       31       4096 mmcblk0p31
 179       32       4096 mmcblk0p32
 179       33       4096 mmcblk0p33
 179       34      32768 mmcblk0p34
 179       35       4096 mmcblk0p35
 179       36       4096 mmcblk0p36
 179       37       4096 mmcblk0p37
 179       38       4096 mmcblk0p38
 179       39      65536 mmcblk0p39
 179       40       4096 mmcblk0p40
 179       41       4096 mmcblk0p41
 179       42       4096 mmcblk0p42
 179       43       4096 mmcblk0p43
 179       44      65536 mmcblk0p44
 179       45     524288 mmcblk0p45
 179       46    5767168 mmcblk0p46
 179       47   23621615 mmcblk0p47
 179       64       4096 mmcblk0rpmb
 253        0   23621615 dm-0

第二步:分区的名字

adb shell ls -l /dev/block/bootdevice/by-name

C:\>adb shell ls -l /dev/block/bootdevice/by-name
total 0
lrwxrwxrwx 1 root root 20 1971-08-18 00:54 DDR -> /dev/block/mmcblk0p2
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 aboot -> /dev/block/mmcblk0p20
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 apdp -> /dev/block/mmcblk0p40
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 boot -> /dev/block/mmcblk0p22
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 cache -> /dev/block/mmcblk0p45
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 cmnlib -> /dev/block/mmcblk0p25
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 cmnlib64 -> /dev/block/mmcblk0p26
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 config -> /dev/block/mmcblk0p38
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 cryptkey -> /dev/block/mmcblk0p29
lrwxrwxrwx 1 root root 20 1971-08-18 00:54 devcfg -> /dev/block/mmcblk0p5
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 devinfo -> /dev/block/mmcblk0p12
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 dip -> /dev/block/mmcblk0p42
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 dpo -> /dev/block/mmcblk0p43
lrwxrwxrwx 1 root root 20 1971-08-18 00:54 dsp -> /dev/block/mmcblk0p8
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 echarge -> /dev/block/mmcblk0p10
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 fastboot -> /dev/block/mmcblk0p13
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 fastinfo -> /dev/block/mmcblk0p14
lrwxrwxrwx 1 root root 20 1971-08-18 00:54 fingerid -> /dev/block/mmcblk0p6
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 fsc -> /dev/block/mmcblk0p16
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 fsg -> /dev/block/mmcblk0p11
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 keymaster -> /dev/block/mmcblk0p27
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 keystore -> /dev/block/mmcblk0p37
lrwxrwxrwx 1 root root 20 1971-08-18 00:54 limits -> /dev/block/mmcblk0p7
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 lksecapp -> /dev/block/mmcblk0p24
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 logdump -> /dev/block/mmcblk0p44
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 mcfg -> /dev/block/mmcblk0p31
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 mdtp -> /dev/block/mmcblk0p34
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 misc -> /dev/block/mmcblk0p36
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 modem -> /dev/block/mmcblk0p21
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 modemst1 -> /dev/block/mmcblk0p17
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 modemst2 -> /dev/block/mmcblk0p18
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 mota -> /dev/block/mmcblk0p33
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 msadp -> /dev/block/mmcblk0p41
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 oem -> /dev/block/mmcblk0p39
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 persist -> /dev/block/mmcblk0p19
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 recovery -> /dev/block/mmcblk0p23
lrwxrwxrwx 1 root root 20 1971-08-18 00:54 rpm -> /dev/block/mmcblk0p3
lrwxrwxrwx 1 root root 20 1971-08-18 00:54 sbl1 -> /dev/block/mmcblk0p1
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 sddump -> /dev/block/mmcblk0p28
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 sec -> /dev/block/mmcblk0p32
lrwxrwxrwx 1 root root 20 1971-08-18 00:54 splash -> /dev/block/mmcblk0p9
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 ssd -> /dev/block/mmcblk0p35
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 syscfg -> /dev/block/mmcblk0p30
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 system -> /dev/block/mmcblk0p46
lrwxrwxrwx 1 root root 20 1971-08-18 00:54 tz -> /dev/block/mmcblk0p4
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 userdata -> /dev/block/mmcblk0p47
lrwxrwxrwx 1 root root 21 1971-08-18 00:54 ztecfg -> /dev/block/mmcblk0p15

第三步:分区挂载的目录

adb shell cat /proc/mounts

adb shell mount 

C:\>adb shell cat /proc/mounts
rootfs / rootfs ro,seclabel,size=1337872k,nr_inodes=334468 0 0
tmpfs /dev tmpfs rw,seclabel,nosuid,relatime,size=1420208k,nr_inodes=355052,mode=755 0 0
devpts /dev/pts devpts rw,seclabel,relatime,mode=600 0 0
proc /proc proc rw,relatime,gid=3009,hidepid=2 0 0
sysfs /sys sysfs rw,seclabel,relatime 0 0
selinuxfs /sys/fs/selinux selinuxfs rw,relatime 0 0
/dev/block/platform/soc/7824900.sdhci/by-name/system /system ext4 ro,seclabel,relatime,discard,data=ordered 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
debugfs /sys/kernel/debug debugfs rw,seclabel,relatime 0 0
tmpfs /mnt tmpfs rw,seclabel,relatime,size=1420208k,nr_inodes=355052,mode=755,gid=1000 0 0
none /config configfs rw,relatime 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
none /dev/cpuset cgroup rw,relatime,cpuset,noprefix,release_agent=/sbin/cpuset_release_agent 0 0
none /dev/cpufreezer cgroup rw,relatime,freezer 0 0
pstore /sys/fs/pstore pstore rw,seclabel,relatime 0 0
none /dev/cgblk cgroup rw,relatime,blkio 0 0
/dev/block/bootdevice/by-name/cache /cache ext4 rw,seclabel,nosuid,nodev,noatime,data=ordered 0 0
/dev/block/bootdevice/by-name/persist /persist ext4 rw,seclabel,nosuid,nodev,noatime,data=ordered 0 0
/dev/block/bootdevice/by-name/dsp /dsp ext4 ro,seclabel,nosuid,nodev,relatime,data=ordered 0 0
/dev/block/bootdevice/by-name/modem /firmware vfat ro,context=u:object_r:firmware_file:s0,relatime,uid=1000,gid=1000,fmask=0333,dmask=0222,codepage=437,iocharset=iso8859-1,shortname=lower,errors=remount-ro 0 0
tmpfs /storage tmpfs rw,seclabel,relatime,size=1420208k,nr_inodes=355052,mode=755,gid=1000 0 0
tracefs /sys/kernel/debug/tracing tracefs rw,seclabel,relatime 0 0
adb /dev/usb-ffs/adb functionfs rw,relatime 0 0
/dev/block/dm-0 /data ext4 rw,seclabel,nosuid,nodev,noatime,discard,noauto_da_alloc,resuid=1000,resgid=9990,data=ordered 0 0
/data/media /mnt/runtime/default/emulated sdcardfs rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=1015,multiuser,mask=6,derive_gid 0 0
/data/media /storage/emulated sdcardfs rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=1015,multiuser,mask=6,derive_gid 0 0
/data/media /mnt/runtime/read/emulated sdcardfs rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,multiuser,mask=23,derive_gid 0 0
/data/media /mnt/runtime/write/emulated sdcardfs rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,multiuser,mask=7,derive_gid 0 0

第四步 adb shell cat /cache/recovery/last_log

adb shell cat /cache/recovery/last_log

C:\>adb shell cat /cache/recovery/last_log
[    0.000323] Starting recovery (pid 402) on Fri Apr 23 11:21:19 1971
[    0.004285] recovery filesystem table
[    0.004319] =========================
[    0.004336]   0 /system ext4 /dev/block/platform/soc/7824900.sdhci/by-name/system 0
[    0.004346]   1 /system ext4 /dev/block/bootdevice/by-name/system 0
[    0.004356]   2 /cache ext4 /dev/block/bootdevice/by-name/cache 0
[    0.004365]   3 /vendor ext4 /dev/block/bootdevice/by-name/vendor 0
[    0.004374]   4 /persist ext4 /dev/block/bootdevice/by-name/persist 0
[    0.004383]   5 /data ext4 /dev/block/bootdevice/by-name/userdata 0
[    0.004392]   6 /sdcard vfat /dev/block/mmcblk1p1 0
[    0.004401]   7 /boot emmc /dev/block/bootdevice/by-name/boot 0
[    0.004410]   8 /recovery emmc /dev/block/bootdevice/by-name/recovery 0
[    0.004420]   9 /misc emmc /dev/block/bootdevice/by-name/misc 0
[    0.004429]   10 /aboot emmc /dev/block/bootdevice/by-name/aboot 0
[    0.004438]   11 /apdp emmc /dev/block/bootdevice/by-name/apdp 0
[    0.004447]   12 /bluetooth emmc /dev/block/bootdevice/by-name/bluetooth 0
[    0.004456]   13 /carrier ext4 /dev/block/bootdevice/by-name/carrier 0
[    0.004465]   14 /cdt emmc /dev/block/bootdevice/by-name/cdt 0
[    0.004474]   15 /cmnlib emmc /dev/block/bootdevice/by-name/cmnlib 0
[    0.004483]   16 /cmnlib64 emmc /dev/block/bootdevice/by-name/cmnlib64 0
[    0.004492]   17 /cryptkey emmc /dev/block/bootdevice/by-name/cryptkey 0
[    0.004501]   18 /DDR emmc /dev/block/bootdevice/by-name/DDR 0
[    0.004510]   19 /devcfg emmc /dev/block/bootdevice/by-name/devcfg 0
[    0.004519]   20 /devcfgbak emmc /dev/block/bootdevice/by-name/devcfgbak 0
[    0.004528]   21 /devinfo emmc /dev/block/bootdevice/by-name/devinfo 0
[    0.004536]   22 /dip emmc /dev/block/bootdevice/by-name/dip 0
[    0.004545]   23 /dpo emmc /dev/block/bootdevice/by-name/dpo 0
[    0.004554]   24 /dsp emmc /dev/block/bootdevice/by-name/dsp 0
[    0.004563]   25 /echarge emmc /dev/block/bootdevice/by-name/echarge 0
[    0.004572]   26 /fastboot emmc /dev/block/bootdevice/by-name/fastboot 0
[    0.004581]   27 /fastinfo emmc /dev/block/bootdevice/by-name/fastinfo 0
[    0.004590]   28 /fbop emmc /dev/block/bootdevice/by-name/fbop 0
[    0.004599]   29 /fingerid emmc /dev/block/bootdevice/by-name/fingerid 0
[    0.004608]   30 /fsc emmc /dev/block/bootdevice/by-name/fsc 0
[    0.004617]   31 /fsg emmc /dev/block/bootdevice/by-name/fsg 0
[    0.004626]   32 /hyp emmc /dev/block/bootdevice/by-name/hyp 0
[    0.004635]   33 /keymaster emmc /dev/block/bootdevice/by-name/keymaster 0
[    0.004643]   34 /keystore emmc /dev/block/bootdevice/by-name/keystore 0
[    0.004653]   35 /limits emmc /dev/block/bootdevice/by-name/limits 0
[    0.004667]   36 /lksecapp emmc /dev/block/bootdevice/by-name/lksecapp 0
[    0.004676]   37 /logdump emmc /dev/block/bootdevice/by-name/logdump 0
[    0.004685]   38 /mcfg emmc /dev/block/bootdevice/by-name/mcfg 0
[    0.004694]   39 /mdtp emmc /dev/block/bootdevice/by-name/mdtp 0
[    0.004703]   40 /modem emmc /dev/block/bootdevice/by-name/modem 0
[    0.004712]   41 /modemst1 emmc /dev/block/bootdevice/by-name/modemst1 0
[    0.004720]   42 /modemst2 emmc /dev/block/bootdevice/by-name/modemst2 0
[    0.004729]   43 /mota emmc /dev/block/bootdevice/by-name/mota 0
[    0.004866]   44 /msadp emmc /dev/block/bootdevice/by-name/msadp 0
[    0.004879]   45 /oem emmc /dev/block/bootdevice/by-name/oem 0
[    0.004888]   46 /persistent emmc /dev/block/bootdevice/by-name/config 0
[    0.004898]   47 /pmic emmc /dev/block/bootdevice/by-name/pmic 0
[    0.004907]   48 /reserve emmc /dev/block/bootdevice/by-name/reserve 0
[    0.004916]   49 /rpm emmc /dev/block/bootdevice/by-name/rpm 0
[    0.004961]   50 /sbl1 emmc /dev/block/bootdevice/by-name/sbl1 0
[    0.004976]   51 /sddump emmc /dev/block/bootdevice/by-name/sddump 0
[    0.004987]   52 /sec emmc /dev/block/bootdevice/by-name/sec 0
[    0.005001]   53 /splash emmc /dev/block/bootdevice/by-name/splash 0
[    0.005012]   54 /ssd emmc /dev/block/bootdevice/by-name/ssd 0
[    0.005021]   55 /sti emmc /dev/block/bootdevice/by-name/sti 0
[    0.005073]   56 /syscfg emmc /dev/block/bootdevice/by-name/syscfg 0
[    0.005085]   57 /tz emmc /dev/block/bootdevice/by-name/tz 0
[    0.005094]   58 /xbl emmc /dev/block/bootdevice/by-name/xbl 0
[    0.005103]   59 /xblbak emmc /dev/block/bootdevice/by-name/xblbak 0
[    0.005112]   60 /ztecfg emmc /dev/block/bootdevice/by-name/ztecfg 0
[    0.005121]   61 /sbl1bak emmc /dev/block/bootdevice/by-name/sbl1bak 0
[    0.005130]   62 /rpmbak emmc /dev/block/bootdevice/by-name/rpmbak 0
[    0.005139]   63 /tzbak emmc /dev/block/bootdevice/by-name/tzbak 0
[    0.005148]   64 /cmnlibbak emmc /dev/block/bootdevice/by-name/cmnlibbak 0
[    0.005157]   65 /cmnlib64bak emmc /dev/block/bootdevice/by-name/cmnlib64bak 0
[    0.005166]   66 /keymasterbak emmc /dev/block/bootdevice/by-name/keymasterbak 0
[    0.005175]   67 /abootbak emmc /dev/block/bootdevice/by-name/abootbak 0
[    0.005184]   68 /ztebak1 emmc /dev/block/bootdevice/by-name/ztebak1 0
[    0.005193]   69 /ztebak2 emmc /dev/block/bootdevice/by-name/ztebak2 0
[    0.005202]   70 /tmp ramdisk ramdisk 0
[    0.005210]
[    0.005224] I:Boot command: boot-recovery

参考资料:

Android查看磁盘分区_习_霜的博客-程序员宅基地_android 查看分区格式

Android系统分区理解及目录细解_Karson Tiger的博客-程序员宅基地_android分区

android分区知识,特别的recovery分区的构成_nicholas_duan的博客-程序员宅基地_recovery分区

Linux中挂载详解以及mount命令用法_daydayup654的博客-程序员宅基地_mount

Linux命令学习9_Ya._的博客-程序员宅基地

版权声明:本文为博主原创文章,遵循 CC 4.0 BY-SA 版权协议,转载请附上原文出处链接和本声明。
本文链接:https://blog.csdn.net/pwp032984/article/details/127001677

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