https://leo.leung.xyz/wiki/index.php?action=history&feed=atom&title=JFFS2 2026-10-12T17:54:33Z Revision history for this page on the wiki MediaWiki 1.43.6 https://leo.leung.xyz/wiki/index.php?title=JFFS2&diff=6922&oldid=prev 2022-10-01T21:17:43Z

<p>Created page with &quot;Journaling Flash File System version 2 is a filesystem used with flash memory devices. This is usually found within firmware files and can be detected by <a href="/wiki/Binwalk" title="Binwalk">binwalk</a>. == Extracting JFFS2 data == Most major distros should support JFFS2 already. You may however still need to install the MTD utilities. {{Highlight | code = # yum -y install mtd-utils | lang = terminal }} The simplest way to extract contents from a JFFS2 filesystem is to create a virtual flash device and the...&quot;</p> <p><b>New page</b></p><div>Journaling Flash File System version 2 is a filesystem used with flash memory devices. This is usually found within firmware files and can be detected by [[binwalk]].<br /> <br /> == Extracting JFFS2 data ==<br /> Most major distros should support JFFS2 already. You may however still need to install the MTD utilities.<br /> {{Highlight<br /> | code = # yum -y install mtd-utils<br /> | lang = terminal<br /> }}<br /> The simplest way to extract contents from a JFFS2 filesystem is to create a virtual flash device and then mount it.<br /> {{Highlight<br /> | code = # modprobe mtdram total_size=32768 erase_size=256<br /> # modprobe mtdblock<br /> <br /> ## Verify<br /> # mtdinfo<br /> # mtdinfo /dev/mtd0<br /> <br /> ## Copy your image and mount it for extraction<br /> # dd if=extracted.bin of=/dev/mtdblock0<br /> # mount -t jffs2 -o ro /dev/mtdblock0 /mnt/disk<br /> | lang = terminal<br /> }}<br /> To clean up, just &lt;code&gt;umount&lt;/code&gt; the directory and &lt;code&gt;rmmod mtdram&lt;/code&gt;.<br /> {{Highlight<br /> | code = # umount /mnt/disk<br /> # rmmod mtdram<br /> | lang = terminal<br /> }}<br /> <br /> == See also ==<br /> <br /> * https://daemons.net/linux/storage/mtd.html</div>

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