8 Gigabyte Sandisk MicroSDHC Incompatibility

[Vencabot Teppoo]

This solution worked for me. I'm genuinely surprised, but I doubled the max click as suggested in this post and I made the EXT3 fs as usual, but, when I checked it, it was clean. I mounted it, saved a file on it, unmounted it, remounted it, and the file was still there.

It's my understanding that increasing max click will drain the battery faster and may increase "wear" on the stick (I don't recall where I read that), but it's a relief to have it working, and I'm really glad that I asked here. :D

Thank you, and perhaps I should make a note about this on the SD compatibility page.

-David

Date: Fri, 21 May 2010 09:46:55 +0300
From: ml at os2.kiev.ua
To: community at lists.openmoko.org
Subject: Re: 8 Gigabyte Sandisk MicroSDHC Incompatibility






  


Vencabot Teppoo wrote:





Hi, i had the same problem, but good news is that this is very easy to
avoid. 



I put in the kernel line glamo_mci.sd_max_clk=10000000 setting. And
after this it works perfectly, no more problems so far for a ~5 months.


 


  Hello,
community! This is my first time joining a mailing list, so excuse me
if my netiquette leaves anything to be desired, and let me know.

  

A couple of weeks ago, I purchased an 8 gig Sandisk microsd card for my
Neo Freerunner since it seems like Sandisk has a good track record of
compatibility according to the wiki. Sadly, after finally getting it
installed and having the time to experiment with it, it seems like its
incompatible; when I run fdisk on it, fdisk completes without error,
but the new partitions don't show up in /dev until I reboot the
Freerunner. After that, I can mkfs, also without error, but checking
the filesystem afterward yields that the filesystem is corrupt, and it
remains corrupt despite fixing it (without error). Rebooting doesn't
help in this case.

  

I've been using Linux exclusively for five years now, but please excuse
me for not being very familiar with changing module options and
what-not. My question is this: it seems like, in some areas of the
wiki, users suggest changing glamo options for microsd to improve
compatibility. I've tried the ones that I've read, and none seem to
have had any appreciable affect. Is there a list somewhere that
describes what-all these options are? Are there more things that I
could try before giving up on this card?

  

My bootloader is the most recent version of Qi, and the system that I
have in NAND is the most recent version of QtMoko. As far as I can
tell, dmesg doesn't report any write errors or any errors related to
the microsd except when I try to mount and it complains that it doesn't
have a valid EXT3 filesystem.

  

Thank you in advance for your help, and I'm sorry if this message
should instead be posted on a technical support mailing list somewhere.
If so, could anyone point me toward it?

  



 		 	   		  
_________________________________________________________________
The New Busy is not the old busy. Search, chat and e-mail from your inbox.
http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_3
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.openmoko.org/pipermail/community/attachments/20100521/9c637b9d/attachment.htm