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Re: Loop device is read only





On Sat, Jul 17, 2010 at 02:06, Erwan David <erwan@rail.eu.org> wrote:
On 16/07/10 22:26, vr wrote:
> I can't seem to write to an image I downloaded and mounted as a loop
> device?
>
> # ls -l /opt | grep floppy
> drwxr-xr-x 2 root root 4096 Jun 18 10:08 floppy
>
> # mount -o loop fdbasecd.iso /opt/floppy/
> #
>
> # grep loop /etc/mtab
> /dev/loop0 /opt/floppy iso9660 rw 0 0
>
> # mount | grep loop
> /dev/loop0 on /opt/floppy type iso9660 (rw)
>
> # touch /opt/floppy/test
> touch: cannot touch `/opt/floppy/test': Read-only file system
>
> # ls -l /opt
> dr-xr-xr-x 4 root root 2048 Sep  4  2006 floppy
>
>
> I don't think it's the ISO... I downloaded it here:
> http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/distributions/1.0/fdbasecd.iso
>
>
> What could cause my permission to go from 755 to 555?
>
> How can I put some more data into this ISO?
>
>
>
> or alternatively... my need is to get a Supermicro BIOS update into a
> bootable DOS diskette image or cdrom image that I will then mount as
> virtual media with Supermicro's IPMIView tool.  If there's a better way,
> please suggest.  Thanks!
>
>

Is iso9660 a writable file system ? I doubt.


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file fdbasecd.iso
fdbasecd.iso: ISO 9660 CD-ROM filesystem data 'FreeDOS 1.0                    ' (bootable)

You can not write to a mounted iso 9660 filesystem.


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