Re: 2.4 -> 2.6 change: mount with disk not in drive semantics changed to something silly

On Wed, 23 Feb 2005, Nix wrote:

> In the Linux 2.4 packet-writing patches, if you tried mounting a
> packet-written CD when there was a disk in the drive but the drive was
> ejected, it pulled the drive in and mounted it.
>
> This is sane behaviour, I think.
>
> In 2.6, that's changed: the first time you try to mount, you get
>
> mount: /dev/pktcdvd/cdrw: can't read superblock
>
> and the *second* time it works.
...
> I imagine this is a bug.

Yes, that's not supposed to happen. It works as expected on my computers
though. I tested with an external USB drive on a computer running FC3 and
kernel 2.6.11-rc4-bk8 and on another computer using an internal IDE drive
(no ide-scsi emulation) running FC2 and kernel 2.6.10.

I did this:

1. Boot computer.
2. Open CD drive.
3. Run "pktsetup cdrw /dev/scd0"
4. Insert UDF packet formatted disc, but did not close CD door.
5. Run "mount /dev/pktcdvd/cdrw /mnt/tmp".

The door then closes and after a while the mount command succeeds.

Are you doing something different? Do you have the same problem if you
mount a CD read-only without using the packet writing driver?

-- 
Peter Osterlund - [email protected]
http://web.telia.com/~u89404340