micro-SD problem on GTA02A5

Andy Green andy at openmoko.com
Wed Jan 23 08:54:01 CET 2008

Hash: SHA1

Somebody in the thread at some point said:
> Hi all,
>> How do I test micro-SD in our newest kernel?
> I try two SanDisk micro-SD cards. One is 128MB and Another is 512MB. The
> 512MB card is successful mounted file system. But 128MB card will fail.

Hiya Willie -

First most of that log is SDIO for WLAN from Sameo's patches, it's fine.

Second, the message that is worrying you is probably

[   89.380000] VFS: Can't find a valid FAT filesystem on dev mmcblk0.
[   89.390000] FAT: bogus number of reserved sectors
[   89.390000] VFS: Can't find a valid FAT filesystem on dev mmcblk0.

but this is also fine.  In the Windows world many Flash devices do not
have a partition table, they stick the filesystem directly to the raw
block device, ie, like it was written on /dev/sda instead of /dev/sda1

The kernel is trying first to mount "/dev/sda" (ie, /dev/mmcblk0) for
that reason and failing because there is a partition table there and not
a filesystem.  Then it tries /dev/mmcblk0p1 (first partition)
and it is okay and doesn't make a message for it... you can just find it
at /media/card

If that isn't the whole problem, please send more about it.

- -Andy
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