df, mtd view the partition of the embedded system

Command: cat proc/mtd

dev:    size   erasesize  name
mtd0: 01000000 00010000 "ALL"
mtd1: 00030000 00010000 "Bootloader"
mtd2: 00010000 00010000 "Config"
mtd3: 00010000 00010000 "Factory"
mtd4: 00700000 00010000 "firmware"
mtd5: 00576664 00010000 "rootfs"
mtd6: 001a0000 00010000 "rootfs_data"
mtd7: 00010000 00010000 "preconfig"
mtd8: 00700000 00010000 "firmware2"

       Through the above command, you can view the disk partition status of the embedded system. 

 

basic concept:

    MTD (memory technology device) is a Linux subsystem for accessing memory devices (ROM, flash). The main purpose of MTD is to make the driver of the new memory device simpler. For this reason, it provides an abstract interface between the hardware and the upper layer, and divides it into a level. The levels are roughly from top to bottom: device file, MTD device layer, MTD original device layer, hardware driver layer. All source code for MTD is in the /drivers/mtd subdirectory.

 

Command: df

Filesystem           1K-blocks      Used Available Use% Mounted on
rootfs                    1664       284      1380  17% /
/dev/root                 4864      4864         0 100% /rom
tmpfs                    30100       252     29848   1% /tmp
/dev/mtdblock6            1664       284      1380  17% /overlay
overlayfs:/overlay        1664       284      1380  17% /
tmpfs                      512         0       512   0% /dev  

    This command can be used to view the disk usage of the file system, as above: mtd5   rootfs in mtd is the file system partition of the embedded system.