8 Gigabyte Sandisk MicroSDHC Incompatibility

Alex Samorukov ml at os2.kiev.ua
Fri May 21 08:46:55 CEST 2010


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?
>

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