jffs is OK, jffs2 gives me trouble!

Mar 21, 2005 4 Replies
G

hi all,



I', trying oto set up an embedded board with JFFS/JFFS2.



Up to now, I'm correctly creating and mounting JFFS file system: I create it with mkfs.jffs, erase my flash, copy it to the flash, and run the kernel with root=/dev/mtdblock0.



Making the same steps with jffs2 (same steps, but I create the fs using mkfs.jffs2) I get the following message while booting the kernel:



VFS: Mounted root (jffs filesystem) readonly Freeing unused kernel memory: 84k freed Warning: unable to open an initial console. Kernel panic: No init found. Try passing init= option to kernel.



It seems the file system was not created correctly: does anyone know it JFFS2 needs some particular setup/initialization/configuration?



I'm using kernel 2.4.21, with JFFS and JFFS2 enabled, running on a AMD AU1100 (MIPS machine), with 16M flash.



thanks for every suggestion gianluca



Vote
Twitter Facebook LinkedIn
G

I give myself an answer: boot the kernel with the option "rootfstype=jffs2": this recognize the filesystem, but each boot give some warning:

jffs2_scan_empty(): Empty block at 0x0000fffc ends at 0x00010000 (with

0x200319y CLEANMARKER node found at 0x00010000, not first node in block (0x00000000) jffs2_scan_empty(): Empty block at 0x0002fffc ends at 0x00030000 (with 0x200319y CLEANMARKER node found at 0x00030000, not first node in block (0x00020000)

Any idea what it means? gianluca

Vote
Twitter Facebook LinkedIn
G

You're trying to mount a JFFS2 filesystem as a JFFS filesystem.

Vote
Twitter Facebook LinkedIn
G

This is pretty normal the first time you bring up a device with JFFS2, especially if it hasn't been formatted or if there is other data still on the device. It should go away and the device should mount and read/write fine.

Vote
Twitter Facebook LinkedIn
G

you got the point! telling the kernel rootfstype=jffs2 solved the problem.

For the other problem, the error disappeared when I created the jffs2 file system with the correct erase block size (mkfs.jffs2 -e 0x20000 ....)

thank you gianluca

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required