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Date: Thu, 20 May 1999 08:53:45 -0700 (PDT)
From: dalcocer@home.com
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Subject: i386/11801: Remounting CD on IDE CDROM after eject fails: read_toc failed
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>Number:         11801
>Category:       i386
>Synopsis:       Remounting CD on IDE CDROM after eject fails: read_toc failed
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu May 20 09:00:01 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator:     Dario Alcocer
>Release:        FreeBSD 3.1-RELEASE
>Organization:
>Environment:
FreeBSD pino.localdomain 3.1-RELEASE FreeBSD 3.1-RELEASE #3: Tue May 18 04:30:37 PDT 1999     root@pino.localdomain:/usr/src/sys/compile/PINO i386
>Description:
Remounting any CD-ROM on an IDE-CDROM drive fails if CD is ejected
and reinserted.  The kernel error message is:

acd0: read_toc failed

IDE-CDROM drive is a Cyberdrive 24x, jumpered as slave drive on
primary IDE channel.

Portion of dmesg:
wdc0 at 0x1f0-0x1f7 irq 14 on isa
wdc0: unit 0 (wd0): <WDC AC2850F>
wd0: 814MB (1667232 sectors), 1654 cyls, 16 heads, 63 S/T, 512 B/S
wdc0: unit 1 (atapi): <ATAPI CDROM/V2.10>, removable, accel, dma, iordy
acd0: drive speed 4125KB/sec, 128KB cache
acd0: supported read types: CD-R, CD-RW, CD-DA
acd0: Audio: play, 255 volume levels
acd0: Mechanism: ejectable tray
acd0: Medium: CD-ROM 120mm data disc loaded, unlocked

>How-To-Repeat:
1. Open IDE CDROM drive tray, insert any ISO-9660 CD (for example,
insert FreeBSD disk 1.)
2. Push tray in.
3. mount /cdrom
4. umount /cdrom
5. Open CDROM drive tray, then close again.
6. mount /cdrom
7. You should see the following message on the console screen:
acd0: read_toc failed

The only way I have found to work around the problem is to do
a hard reset (i.e. shutdown -h now, turn off machine, turn on
machine.)  Note that a soft reset (shutdown -r now) will not
make the problem go away.
>Fix:


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


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