Arch Linux

mongoose088

Member

Registered: 2008-09-14

Posts: 32

Mounting MicroSD Card Problem [SOLVED]

I'm trying to get total read and write access when I insert my micro sd card. It will automount, but I can't delete or write files.

Here's what I've done on command line:
Disk /dev/sda: 100.0 GB, 100030242816 bytes
255 heads, 63 sectors/track, 12161 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        7833    62918541    7  HPFS/NTFS
/dev/sda2            7834       12039    33784695   83  Linux
/dev/sda3           12040       12161      979965   82  Linux swap / Solaris

Disk /dev/mmcblk0: 2032 MB, 2032664576 bytes
64 heads, 63 sectors/track, 984 cylinders
Units = cylinders of 4032 * 512 = 2064384 bytes
Disk identifier: 0x00000000

        Device Boot      Start         End      Blocks   Id  System
/dev/mmcblk0p1               1         984     1983619+   6  FAT16
[tom@laptop ~]$ sudo mount -t vfat /dev/mmcblk0p1 /media/disk
mount: block device /dev/mmcblk0p1 is write-protected, mounting read-only

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I've also tried to change this with the chown command:
[tom@laptop ~]$ sudo chown -R tom /media/disk
[Then it lists that it's changing the ownership of everything on my card, like so]
chown: changing ownership of `/media/disk/my_sounds': Read-only file system

but still no luck. I have admin access, so sudo commands is no issue. I'm hoping I can change this so when it automounts, there is read write permissions.

Thanks for your help!

Last edited by mongoose088 (2008-12-18 22:56:17)

sisco311

Member

From: Romania

Registered: 2008-05-23

Posts: 112

Re: Mounting MicroSD Card Problem [SOLVED]

try to remount it:

sudo umount /dev/mmcblk0p1
sudo mount -t vfat -o defaults,rw,umask=0 /dev/mmcblk0p1 /media/disk

you can NOT set the permissions with chown and chmod.
but you can to set the permissions at mount time:
defaults,rw,dmask=007,fmask=117,uid=userid,gid=groupid

to find your uid/gid type:

id

in a terminal.

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mongoose088

Member

Registered: 2008-09-14

Posts: 32

Re: Mounting MicroSD Card Problem [SOLVED]

This is really strange.
using the id command, I find that both my uid and gid is 1000, and enter it in terminal:

[tom@laptop ~]$ sudo mount -t vfat -o defaults,rw,dmask=007,fmask=117,uid=1000,gid=1000 /dev/mmcblk1p1 /media/disk
mount: block device /dev/mmcblk1p1 is write-protected, mounting read-only

It mounts correctly, and when I right click the desktop icon and look at permissions, it says "tom" has both group and owner read/write authority. But When I try to delete files, it won't let me. When I try to delete things in terminal, it says it's still a read only file system. Am I missing anything else?

Thanks for the reply so far.

EDIT-- This is the output of id, in case you need it:
uid=1000(tom) gid=1000(tom) groups=7(lp),10(wheel),91(video),92(audio),93(optical),95(storage),100(users),1000(tom)

Last edited by mongoose088 (2008-12-18 03:37:04)

otacon

Member

From: USA

Registered: 2008-06-29

Posts: 170

Website

Re: Mounting MicroSD Card Problem [SOLVED]

just a newb to newb comment that may be silly.

What is the Card formatted as?
Maybe it is a problem with the mounting format

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mongoose088

Member

Registered: 2008-09-14

Posts: 32

Re: Mounting MicroSD Card Problem [SOLVED]

it's FAT16, which, if I'm not mistaken, is a common format for smaller sized storage devices (eg a USB drive). I don't think the format is the issue, but I guess I can't totally dismiss it.

Thanks for the reply.

perbh

Member

From: Republic of Texas

Registered: 2005-03-04

Posts: 765

Re: Mounting MicroSD Card Problem [SOLVED]

On some of the earlier sd's  I seem to recall that there was a small (manual) switch so that you could make it ro ...

pyther

Member

Registered: 2008-01-21

Posts: 1,395

Website

Re: Mounting MicroSD Card Problem [SOLVED]

^^
Ditto I believe that some of the SD cards I have, have a switch on it. See if yours has any type of switch for read only.

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mongoose088

Member

Registered: 2008-09-14

Posts: 32

Re: Mounting MicroSD Card Problem [SOLVED]

On some of the earlier sd's  I seem to recall that there was a small (manual) switch so that you could make it ro ...

Ditto I believe that some of the SD cards I have, have a switch on it. See if yours has any type of switch for read only.

WOW I didn't even realize what that switch was for, I feel like a real newbie at the moment. Thank you SO much for the help, the switch fixed the problem completely!