CRC failed on node ....

CRC failed on node ....

[Brian T]

Running the 2.4.20 kernel, after a power outage 2 of my test units get boot 
message mount errors:

jffs2_scan_dirent_node(): Name CRC failed on node at 0x00b620c8: Read 
0x640c8ca3, calculated 0x795111fe
jffs2_scan_dirent_node(): Name CRC failed on node at 0x00eaf1e0: Read 
0x16f2116a, calculated 0x0622ba51

The units seem to boot fine, but I'm sure there are probably files I can no 
longer access on the file system.

Is this possibly from JFFS2 running garbage collection when the power is 
removed?  Is there an MTD utility to fix this corruption _while_ the ROM is 
mounted?  Is there a work around ( like running "sync" every 5 minutes in 
cron )?

Thanks,

-Brian 

Re: CRC failed on node ....

[Artem B. Bityutskiy]

Brian T wrote:
> Running the 2.4.20 kernel, after a power outage 2 of my test units get boot 
> message mount errors:
> 
> jffs2_scan_dirent_node(): Name CRC failed on node at 0x00b620c8: Read 
> 0x640c8ca3, calculated 0x795111fe
> jffs2_scan_dirent_node(): Name CRC failed on node at 0x00eaf1e0: Read 
> 0x16f2116a, calculated 0x0622ba51

Brain, I've just added the corresponding entry to the JFFS2 FAQ, please, 
read it. If it is vague - ask.

http://www.linux-mtd.infradead.org/faq/jffs2.html

-- 
Best Regards,
Artem B. Bityuckiy,
St.-Petersburg, Russia.

Re: CRC failed on node ....

[Brian T]

Thank you Artem, that clears it up.

-Brian

> 
> Brain, I've just added the corresponding entry to the JFFS2 FAQ, please, 
> read it. If it is vague - ask.
> 
> http://www.linux-mtd.infradead.org/faq/jffs2.html
> 

Re: CRC failed on node ....

[Brian T]

So, should the garbage collection eventually fix it by itself?


> In the power fail testing I have done, I did not see any files corrupted,
> other than the actual file data that was being actively written at the time
> of the power fail. I did see the same type of message and I assumed that
> that it was leftover junk that would get garbage collected later. I could
> not seem to force it to go away.
> 
> Vern Sauder