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
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