[maemo-users] The MMC issues

From: Eero Tamminen eero.tamminen at nokia.com
Date: Fri Oct 5 18:53:56 EEST 2007

ext Patrick Ohly wrote:
> On Thu, 2007-10-04 at 10:15 +0300, Eero Tamminen wrote:
>> The issue was not about SDHC compatibility but power management.
>> There were several 2GB Sandisk Ultra II cards that had been damaged.
>> If you use only the pre-installed/supported Nokia software you're
>> very unlikely to trigger the issue, but e.g. with Maemo mapper
>> that's much more likely.
> This is exactly what happened to me with a 2GB MMC-RS on my 770 with the
> hacker edition after I bought it a month ago: downloading many maps with
> Maemo Mapper sooner or later caused file system corruption. Reading was
> luckily more stable, so I reformatted on my desktop and filled the card
> there before going on a vacation with it.

If you can reformat or fsck your card it's not the same problem.
FAT file system will corrupt e.g. if you take the USB cable out
without synching MMC the contents.

> I have seen quite a few mails about this issue and read the Bugzilla
> entry, but as far as I can tell no one has mentioned this problem in
> combination with a 770. Am I the only one seeing it there? Now that the
> reason is known, is it possible that it also affects the kernel used for
> the 770? Should I create a new bug report for it in the HE tracker (as
> this is what I use)?

I think the hacker edition hasn't updated the kernel, only the software
on the rootfs.  I don't know whether the N770 kernel had the same power
management issue as N800, the hardware at least is a bit different so
it might not.

	- Eero

More information about the maemo-users mailing list