MicroSD card mounts read-only

[Jason Crain]

On Tue, December 30, 2008 11:28 am, darkweasel wrote:
> Jason Crain schrieb:
>>   A couple more things:  After
>> you plug in the card, check the last few lines from the "dmesg" command.
>> Linux may change it to read only if it encounters errors from the
>> device.
>>
> [31788.888650] sd 6:0:0:3: [sde] 3842048 512-byte hardware sectors (1967
> MB)
> [31788.893145] sd 6:0:0:3: [sde] Write Protect is on
> [31788.893155] sd 6:0:0:3: [sde] Mode Sense: 23 00 80 00
> [31788.893162] sd 6:0:0:3: [sde] Assuming drive cache: write through
> [31788.898145] sd 6:0:0:3: [sde] 3842048 512-byte hardware sectors (1967
> MB)
> [31788.902520] sd 6:0:0:3: [sde] Write Protect is on
> [31788.902530] sd 6:0:0:3: [sde] Mode Sense: 23 00 80 00
> [31788.902536] sd 6:0:0:3: [sde] Assuming drive cache: write through
> [31788.902546]  sde:
>
>> Also try running "mount" with no arguments.  It should show you if the
>> device is mounted read only (ro)
>
> Yes, it does.
> /dev/sde on /media/card type vfat
> (ro,nosuid,nodev,umask=0000,user=darkweasel)

Try unmounting and checking the filesystem:
sudo umount /dev/sde
sudo fsck.vfat -r /dev/sde

And then see if you can mount it writable:
sudo mount /dev/sde /media/card -o rw,user=darkweasel,umask=0000