Subject: Re: port-i386/16520: It doesn't support cdrom device (SONY CD-ROM CDU5221)
To: None <>
From: Manuel Bouyer <>
List: netbsd-bugs
Date: 04/27/2002 17:36:48
On Sat, Apr 27, 2002 at 06:16:47AM -0700, wrote:
> [...]
> My problem is that i cannot mount cdrom device. It's a SONY CD-ROM CDU5221 (as you can see above).
> I tried the ordinary way :
> #mount -t cd9660 -o ro /dev/cd0a /mnt
> and 
> #mount -t cd9660 /dev/cd0a /mnt
> but no response. 
> I noticed that the led of the device doesn't flash after the command (but it should).
> After mount command sometimes it says :
> cd0(pciide0:1:0): readonly device
> mount_cd9660: /dev/cd0a on /mnt: Device not configured
> and other :
> cd0(pciide0:1:0): readonly device
> mount_cd9660: /dev/cd0a on /mnt: Read-only file system

This is because the device send an error "readonly device" to some command.
Now the problem is to find which command did trigger that.

Can you try a basic command:
dd if=/dev/rcd0d of=/dev/null bs=2k count=1

to see if it can read data from the raw device ?

Manuel Bouyer <>