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I'm using Ubuntu 9.04 and when I try to mount an SD card with the GUI I have to type sudo mount -o remount,rw /media/disk before I can write anything to the card. Is there a hidden setting to make it mount read-write?

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We could use some diagnostic information. Under System->Administration, there's an application to view the system logs. Watch /var/log/syslog while you insert the card and see if anything comes up. Also, open up Places->Computer, and right-click on your SD card and select Properties. Go to the Volume tab and tell us what filesystem the SD card is. – Ryan Thompson Oct 11 '09 at 2:29
    
It's FAT32 for compatibility with a Sansa Fuze. It looks like my first solution was correct, but I had corrupted the filesystem again by removing the card too soon. I will think about replacing the card, maybe it has some bad blocks. – joeforker Oct 12 '09 at 13:10
    
This question, in fact, was the answer to my problem. Hail sudo mount -o remount,rw /media/disk. :D – Bleeding Fingers Jan 7 '14 at 20:13
up vote 6 down vote accepted

I ran sudo fsck -a ... on the offending device. After fixing the file system corruption it mounts read-write. I had the problem again, and fixed it again with fsck. Will have to be more careful about always ejecting properly.

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up vote 1 down vote

i was just looking for this as an eee pc specific problem and came across this:

Open terminal.

type in

cd ..

until you are at your file system level, ie your cd .. just returns to where you are at.

Type in

cd /media

Type in

ls -l

to see if your disk is there, usually labeled as disk. You will see something like:

drwxr-xr-x 3 root root 4096 2008-01-20 09:53 disk

Now you will need to change premissions,

Type in

sudo su

and your password. Type in

chown <your user name> <disk name>

ie:

chown user disk

Now type in

ls -l

and you should see the change.

ie: drwxr-xr-x 3 user root 4096 2008-01-20 09:53 disk

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In my case, the media was mounted read-only, so not even root could write to it. Modern distributions provide a gui to mount removable media in which case it will be writable by the current user. – joeforker Oct 13 '09 at 18:40
up vote 1 down vote

Did you check the write protection hard-switch on the sd-card reader adapter? That was the problem for me.

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