[maemo-users] N810 built-in flash: unreliable?

From: Marius Gedminas marius at pov.lt
Date: Sun Mar 30 14:17:10 EEST 2008
On Sun, Mar 30, 2008 at 10:57:37AM +0000, Andrew Flegg wrote:
> On Sun, Mar 30, 2008 at 10:52 AM, Marius Gedminas <marius at pov.lt> wrote:
> > Something weird is happening to my N810's internal flash memory (the
> >  one with the VFAT-formatted 2 gig "internal memory card", not the 256
> >  meg jffs2 root filesystem).
> >
> >  It appears as if writing near the end of the device wraps around and
> >  destroys the data at the beginning.  I can reproduce it like this:
> Could this be related to the N810s being shipped with a broken
> partition table?
>     https://bugs.maemo.org/show_bug.cgi?id=2940

No, because I noticed that on day 1 and reformatted the card, after
which the kernel no longer complained about partition being larger than
the device.

Also, I can get a fs error in dmesg if I deliberately create a smaller
filesystem (1.7 gig) with

  sudo mkdosfs -F 32 /dev/sdb1 1700000

and then fill it up with a single big file.

If I reduce the filesystem size to just 1000000 blocks, I can fill it up
with no kernel complaints in dmesg.

I don't like to think what my dd experiments are doing to the lifetime
of the flash memory.

Marius Gedminas
"question = (to) ? be : !be;" -- Shakespeare
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: Digital signature
Url : http://lists.maemo.org/pipermail/maemo-users/attachments/20080330/fc7d9648/attachment.pgp 
More information about the maemo-users mailing list