Can't change permissions; "read-only filesystem"

Paul DeShaw pauldeshaw at
Tue Jul 22 17:10:09 BST 2008

I wrote:

> pad at Studio909:~$ ls -l /media
> total 12<snip>
> drwxrwxrwx  1 root root   19 2008-06-22 22:46 PPA1.2
> drwxr-xr-x 21 root root 4096 2008-07-09 09:22 UbuntuStudio
> PPA1.2 is the external drive; UbuntuStudio is the old semi-broken
> installation.  I can mount it and access files, like the permissions
> indicate.  But on PPA1.2, I get messeges saying I don't have the needed
> permissions, even though it's rwx all the way across.
> I will mess with that later.

I've been messing with it.  When I try to cheat and use the GUI file browser
as root,
I can't make any of these sessions read-and-write. (Right-clicking on
"properties", then clicking the "permissions" tab, lets you change
permissions in a GUI file browser).  I get an error; 'cannot change
permissions to something.wav  Read-only file system' Either a .wav file or a
file with a name like "93992436libardourvampplugins:perusssionsets:2" will
get this error.  I will get out my Linux command book tomorrow and try to
use chmod and/or chown to see if it works any better.

These same files and folders are now suddenly read-only on my other
installation, which had full access before I did the new install.  I had the
drive plugged in when I ran the install.  Could that be the reason?  They
are owned by pad, which is the user name I'm using on the new installation
as well.  Curiously, files owned by 99 are read-and-write.  These are
sessions I started in Ardour under Mac OS X; I don't know why the owner is
99, because there is no user account on any system I use called '99'.   But
I set the permissions in OS X so that 'others' has read and write access.
At least one of these sessions now works everywhere, including the new

Every time I fix something, something else breaks, and I never end up with a
useable system.  I started building this system in the summer of '06, and
still haven't been able to really use it.  Is this some kind of record?

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