June 2017
Intermediate to advanced
478 pages
13h 14m
English
Content preview from Mastering Embedded Linux Programming - Second Edition
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Creating a JFFS2 filesystem
Creating an empty JFFS2 filesystem at runtime is as simple as erasing an MTD partition with clean markers and then mounting it. There is no formatting step because a blank JFFS2 filesystem consists entirely of free blocks. For example, to format MTD partition 6, you would enter these commands on the device:
# flash_erase -j /dev/mtd6 0 0# mount -t jffs2 mtd6 /mnt
The -j option to flash_erase adds the clean markers, and mounting with type jffs2 presents the partition as an empty filesystem. Note that the device to be mounted is given as mtd6, not /dev/mtd6. Alternatively, you can give the block device node /dev/mtdblock6. This is just a peculiarity of JFFS2. Once mounted, you can treat it like any other filesystem. ...
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