JFFS2 and bad blocks

simon at baydel.com simon at baydel.com
Mon Jan 6 12:04:15 EST 2003

I download the CVS stuff mid December and again today. The 
hardware ran ok before and could use jffs2 without errors but as I 
added files it was slow and I could not make file systems on 
partitions which contained bad blocks.

The new CVS code seems to be much quicker and I can erase, 
mount and copy files to my new filesystem without error. I have set 
up the specific driver to do soft ecc. I noticed that when I reboot the 
system and the filesystem gets mounted I get errors. The more 
writes that occur the more errors I seem to get. I ran a test for a 
week or so over the break which generated log files. A reboot after 
this produced thousands of errors but the filesystem seemed ok. 

The errors are something like

Empty flash at 0x00469ffcb ends at 0x0046a000


jffs2_scan_dirent_node(): Node CRC failed on node at 0x0046a7f0 
read 0xffffffff calculated 0xdec8161b

I was wondering if any of you could shed any light on this.

On 3 Dec 2002, at 14:03, Thomas Gleixner wrote:

> On Tuesday 03 December 2002 11:23, simon at baydel.com wrote:
> > I am using an SMC via the MTD layer. On one of the partitions I
> > would like to put a JFFS2 filesystem. Normally I erase the partition
> > and then mount it JFFS2. The problem is that if the partition has a
> > bad block I cannot erase or mount it. Does the bad block handling
> > have to be in the vendor specific nand driver ?
> Please use latest MTD-CVS code.
> Read http://www.linux-mtd.infradead.org/tech/nand.html
> -- 
> Thomas
> ____________________________________________________
> linutronix - competence in embedded & realtime linux
> http://www.linutronix.de
> mail: tglx at linutronix.de


Simon Haynes - Baydel 
Phone : 44 (0) 1372 378811
Email : simon at baydel.com

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