On Wed, 11 Jan 2017 11:52:30 -0500 Ric Moore sent: > On 01/11/2017 03:02 AM, Thomas Schmitt wrote: > > Hi, > > > > Charlie wrote: > >> mount: /dev/sr0 is write-protected, mounting read-only > >> mount: special device /dev/sr0 does not exist > > > > Does command dmesg report something about "sr0" after this > > happened ? > > > > > > Have a nice day :) > > Do you have a bios selection for the cdrom drive?? Last time this > happened to me, replacement of the drive fixed the problem. Ric
After contemplation, my reply is: Just for completeness: Checked the BIOS to see if there was anything that might be changed or to be discovered, without result. Changed some of the numbers in: /etc/udev/rules.d/persistent-cd.rules Which brought up error messages about /dev/sr0 not being a block device. Then went through the: mknod sr0 b 11 0 process as explained previously again. Rebooted the system. Ran through discovering what was now happening- surprise: ls -l /dev/sr0 brw-rw----+ 1 root cdrom 11, 0 Jan 12 08:54 /dev/sr0 Did eject, put in a data DVD, and read it. Ejected it again closed the drawer Retried eject: ~$ eject eject: tried to use `/dev/sr0' as device name but it is no block device eject: unable to find or open device for: `cdrom' So the drive is definitely crook. Thanks for your suggestions. Much appreciated. Charlie -- Registered Linux User:- 329524 *********************************************** He is a hard man who is only just, and a sad one who is only wise. --Voltaire *********************************************** Debian GNU/Linux - Magic indeed. -----------------------------------------------------