kern/79660: ATAPI CD driver /dev/acd0tNN fails if device not otherwise initialized

[Alan Larson]

>Number:         79660
>Category:       kern
>Synopsis:       ATAPI CD driver /dev/acd0tNN fails if device not otherwise initialized
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Apr 08 00:20:06 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Alan Larson
>Release:        FreeBSD 4.8-RELEASE i386
>Organization:
Coaster Makers r Us
>Environment:
System: FreeBSD azp.int.paix.net 4.8-RELEASE FreeBSD 4.8-RELEASE #0: Thu May  8 16:28:19 PDT 2003     larson at azp.int.paix.net:/usr/src/sys/compile/LOCAL  i386

>Description:

Attempting to read an audio track from an atapi cd will get errors
if the device has not been previously initialized by some other use.

As described in the FreeBSD Handbook section "Duplicating Audio CDs":
cd /dev
sh MAKEDEV acd0t99
cd
dd if=/dev/acd0t01 of=output_file bs=2352
dd: /dev/acd0t1: Device not configured

  but - if you mount a data cd then unmount it first, it will work.

>How-To-Repeat:

Reboot (power cycle), and try copying an audio track as described above.

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: