"df -H" - Display Mounted File Systems

Android Tutorials - Herong's Tutorial Examples

∟"df -H" - Display Mounted File Systems

This section provides a tutorial example on how to use the 'df -H' command on the 'adb shell' interface to display mounted file systems and their space usages.

To list file systems on your Android device, you can use the "df -H" command on the "adb shell" interface. It displays mounted file systems and their space usages.

Here is an example on my Motorola phone, which runs on the Android 12 system with a total storage of 128GB.

herong$ adb shell getprop ro.build.version.release
12

herong$ adb shell df -H
Filesystem            Size Used Avail Use% Mounted on
/dev/block/dm-8       1.0G 1.0G     0 100% /
tmpfs                 2.9G 2.8M  2.9G   1% /dev
tmpfs                 2.9G    0  2.9G   0% /mnt
/dev/block/dm-9       884M 881M     0 100% /system_ext
/dev/block/dm-10      591M 590M     0 100% /vendor
/dev/block/dm-11      3.8G 3.8G     0 100% /product
tmpfs                 2.9G  29k  2.9G   1% /apex
/dev/block/mmcblk0p14 3.9M  98k  3.5M   3% /mnt/product/persist
/dev/block/dm-12      110G 8.7G  101G   8% /data
/dev/block/loop5      8.6M 8.6M     0 100% /apex/com.android.runtime@1
/dev/block/loop10      37M  37M     0 100% /apex/com.android.i18n@1
/dev/block/dm-15      770k 741k   16k  98% /apex/com.android.ipsec@...
/dev/block/dm-18      5.9M 5.9M     0 100% /apex/com.android.media@...
/dev/fuse             110G 8.7G  101G   8% /storage/emulated
...

It seems that the same partition of 110GB is represented as 2 file systems: /dev/block/dm-12 and /dev/fuse, which are mounted as 2 directories: /data and /storage/emulated.

As a comparison, here is what I got on my Samsung phone running Android 8.

herong$ adb shell getprop ro.build.version.release
8.0.0

herong$ adb shell df -H
Filesystem                     Size  Used Avail Use% Mounted on
rootfs                         1.6G   11M  1.6G   1% /
tmpfs                          1.7G  766k  1.7G   1% /dev
/dev/block/dm-0                4.6G  4.1G  584M  88% /system
tmpfs                          1.7G     0  1.7G   0% /mnt
tmpfs                          1.7G     0  1.7G   0% /mnt/secure
/dev/block/sda16               100M   49M   51M  50% /firmware
/dev/block/sdd7                 12M  4.6M  7.6M  38% /dsp
/dev/block/sda5                 29M  188k   29M   1% /persist
/dev/block/sda20               609M  5.7M  604M   1% /cache
/dev/block/sda6                 16M  922k   16M   6% /efs
/dev/block/sda15               100M   49M   51M  50% /firmware
/dev/block/sda16               115M   77M   39M  67% /firmware-modem
/dev/block/sda21                42M   12k   42M   1% /carrier
tmpfs                          1.7G     0  1.7G   0% /storage
/dev/block/dm-1                 57G   36G   21G  63% /data
/data/knox/secure_fs/enc_user   57G   36G   21G  63% /data/enc_user
/data/knox/secure_fs/enc_media  57G   36G   21G  63% /data/knox/secure_fs/enc_media
/data/knox/secure_fs/enc_media  57G   36G   21G  63% /mnt/shell/enc_emulated
/data/media                     57G   36G   21G  64% /storage/emulated

Here is what I got on an Android 5.1.1 emulator.

herong> adb shell df

Filesystem               Size     Used     Free   Blksize
/dev                   242.9M    24.0K   242.8M   4096
/sys/fs/cgroup         242.9M    12.0K   242.9M   4096
/mnt/asec              242.9M     0.0K   242.9M   4096
/mnt/obb               242.9M     0.0K   242.9M   4096
/system                541.3M   363.9M   177.5M   4096
/data                  541.3M   158.0M   383.3M   4096
/cache                  65.0M     4.3M    60.7M   4096
/mnt/media_rw/sdcard    31.5M     3.2M    28.3M   512
/storage/sdcard         31.5M     3.2M    28.3M   512

Here is what I got on an Android 4.0.3 emulator.

herong> adb shell df

Filesystem             Size   Used   Free   Blksize
/dev                   252M    32K   252M   4096
/mnt/asec              252M     0K   252M   4096
/mnt/obb               252M     0K   252M   4096
/system                161M   161M     0K   4096
/data                  124M    13M   110M   4096
/cache                  64M     1M    62M   4096
/mnt/sdcard            126M  1016K   125M   512
/mnt/secure/asec       126M  1016K   125M   512