JFFS2 errors - are these normal?

[Ramesh]

On 12/19/07, Patrick Agrain <patrick.agrain at alcatel-lucent.fr> wrote:
> Hi Ramesh ,
>
> What Flash from ST have you tested ? Is it a 256MBytes ? Large Pages
> (2048 bytes) ?
> What is the marking on the chip ?
>
> Thanks in advance.
> Regards,
>
> Patrick Agrain

Hi Patrick,

The driver reports the following:
NAND device: Manufacturer ID: 0x20, Chip ID: 0xda (ST Micro NAND 256
MiB 3.3V 8-bit)
The page size is 2k and erasesize is 0x20000.

--Ramesh

> > On Tue, 18 Dec 2007, Ramesh wrote:
> >
> >> Hi,
> >>
> >> I am using linux 2.6.19 and ST micro NAND chip (256M) on a PowerPC
> >> platform. After booting the OS, we install firmware on to the flash.
> >> These firmware images are RPM packages. Once some packages are
> >> installed, we start getting some ECC errors. I guess that's fine but
> >> after a few more RPM installs, the errors seem more serious. Here's a
> >> sample:
> >
> > You shouldn't be getting ECC errors that quickly, on a chip like that I
> > would expect it would take many months before you'd see an ECC error if
> > ever.
> >
> > My guess without knowing more would be that there is a hardware problem
> > causing the communication with the nand chip to fail ever so often.
> >
> >> The jffs2 image is created with the following flags: -e 0x20000 -s
> >> 0x1000 -b -v -p -n
> >> Then I use sumtool with -e 0x20000 -b -p.
> >
> > If the device mounts properly then there shouldn't be much wrong with the
> > image.
> >
> > /Ricard
> > --
> > Ricard Wolf Wanderlöf                           ricardw(at)axis.com
> > Axis Communications AB, Lund, Sweden            www.axis.com
> > Phone +46 46 272 2016                           Fax +46 46 13 61 30