At the moment it seems that the Journalling Flash File System
JFFS
is the best choice for filesystems in flash memory of embedded
devices. You must enable the following configuration options to get
JFFS support in your system:
CONFIG_JFFS_FS=y
CONFIG_JFFS_FS_VERBOSE=0
If the flash device is erased, we can simply mount it, and the
creation of the
JFFS filesystem is performed automagically.
Note: For simple accesses like direct read or write operations or
erasing you use the
character device interface (
/dev/mtd*) of
the
MTD layer, while for filesystem operations like mounting we must
use the
block device interface (
/dev/mtdblock*).
# eraseall /dev/mtd2
Erased 4096 Kibyte @ 0 -- 100% complete.
# mount -t jffs /dev/mtdblock2 /mnt
# mount
/dev/root on / type nfs (rw,v2,rsize=4096,wsize=4096,hard,udp,nolock,addr=10.0.0.2)
proc on /proc type proc (rw)
devpts on /dev/pts type devpts (rw)
/dev/mtdblock2 on /mnt type jffs (rw)
# df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/root 2087212 1232060 855152 60% /
/dev/mtdblock2 3584 0 3584 0% /mnt
Now you can access the files in the
JFFS filesystem in the
/mnt directory.
