fs mount

fs mount
	225.4. Filesystem Interface

Name

fs mount — Mount a filesystem

Synopsis

fs mount [-d device] [-t fstype] {mountpoint}

Arguments

Name	Type	Description	Default
`device`	String	Device containing filsystem to mount.	undefined
`fstype`	String	Filesystem type.	fatfs:sync=write
`mountpoint`	String	Pathname for filesystem root.	/

Description

This command is used make a filesystem available for access with the filesystem access commands. Three things need to be defined to do this. First, the name of the device on which the filesystem is stored needs to be given to the -d option. Secondly, the type of filesystem it is needs to be given to the -t option. Finally, the pathname by which the new filesystem will be accessed needs to be supplied. Following a successful mount, the root of the filesystem will be accessible at the mountpoint.

The -t option is optional. If not given a default filesystem type is chosen. At present this is "fatfs:sync=write" which chooses a FAT filesystem that writes data back to the device immediately. See the FAT filesystem documentation for more details of the options available.

RedBoot must have been built with the required filesystem support enabled in its eCos configuration in order to be able to access filesystems of the necessary type. On the majority of platforms, no filesystems are included in RedBoot at all due to the extra memory footprint overhead for RedBoot this would otherwise incur.

Examples

The following example mounts a JFFS2 partition identified by the FIS partition name "jffs2test" at location /flash :

RedBoot> fs info
Filesystems available:
ramfs
jffs2
fatfs

Devices available:
/dev/flash/
/dev/mmcsd0/

Mounted filesystems:
         Device Filesystem Mounted on
    <undefined>      ramfs /
RedBoot> fs mount -d /dev/flash/fis/jffs2test -t jffs2 /flash
RedBoot> fs info
Filesystems available:
ramfs
jffs2
fatfs

Devices available:
/dev/flash/
/dev/mmcsd0/

Mounted filesystems:
         Device Filesystem Mounted on
    <undefined>      ramfs /
    /dev/flash/fis/jffs2test      jffs2 /flash
RedBoot>

Consult the documentation within the generic Flash driver package on Flash I/O devices for further information on configuration and usage of /dev/flash/ devices for use with JFFS2.

Further examples of mount commands are:

Mount a JFFS2 partition located at offset 0x40000 in the first flash device, of length 2Mbytes, at location /jffs2 :
```
RedBoot> fs mount -d /dev/flash/0/0x40000,0x200000 -t jffs2 /jffs2
```
Mount a FAT partition located on the first partition of an SD card at location / :
```
RedBoot> fs mount -d /dev/mmcsd0/1 -t fatfs /
```
Mount a ROMfs partition located at address 0x48000000 in flash at location /romfs :
```
RedBoot> fs mount -d 0x48000000 -t romfs /romfs
```
Note that ROMfs uses absolute addresses as the device name, and not /dev/flash/ Flash I/O devices.


fs info		fs umount

2024-03-18

eCosPro Non-Commercial Public License