Overkeen CDROM disk-change messages

Overkeen CDROM disk-change messages

[Chris Rankin]

Hi,
It looks like my CDROM driver had a busy night last night
... ;-). This was with Linux 2.4.5, dual Pentium III, devfs, < 1GB
memory. There was no CDROM in the drive, but I had kept the CD player
running anyway.

Cheers,
Chris

May 27 02:10:03 twopit kernel: hdc: ATAPI 32X CD-ROM CD-R/RW drive, 4096kB Cache, UDMA(33)
May 27 02:10:03 twopit kernel: Uniform CD-ROM driver Revision: 3.12
May 27 02:10:03 twopit kernel: VFS: Disk change detected on device ide1(22,0)
May 27 02:10:35 twopit last message repeated 8 times
May 27 02:11:35 twopit last message repeated 15 times
May 27 02:12:35 twopit last message repeated 15 times
May 27 02:13:35 twopit last message repeated 15 times
May 27 02:14:35 twopit last message repeated 15 times
May 27 02:15:35 twopit last message repeated 15 times
May 27 02:16:35 twopit last message repeated 15 times
May 27 02:17:36 twopit last message repeated 15 times
May 27 02:18:32 twopit last message repeated 14 times
May 27 02:19:32 twopit last message repeated 15 times
May 27 02:20:32 twopit last message repeated 15 times
May 27 02:21:32 twopit last message repeated 15 times
May 27 02:22:32 twopit last message repeated 15 times
May 27 02:23:32 twopit last message repeated 15 times
May 27 02:24:33 twopit last message repeated 15 times
May 27 02:25:33 twopit last message repeated 15 times
May 27 02:26:33 twopit last message repeated 15 times
May 27 02:27:33 twopit last message repeated 15 times
May 27 02:28:33 twopit last message repeated 15 times
May 27 02:29:33 twopit last message repeated 15 times
May 27 02:30:34 twopit last message repeated 15 times
May 27 02:31:34 twopit last message repeated 15 times
May 27 02:32:34 twopit last message repeated 15 times
May 27 02:33:34 twopit last message repeated 15 times
...
[snip]
...
May 27 12:23:32 twopit last message repeated 15 times
May 27 12:24:33 twopit last message repeated 15 times
May 27 12:25:33 twopit last message repeated 15 times
May 27 12:26:33 twopit last message repeated 15 times
May 27 12:27:33 twopit last message repeated 15 times
May 27 12:28:33 twopit last message repeated 15 times
May 27 12:29:33 twopit last message repeated 15 times
May 27 12:30:33 twopit last message repeated 15 times
May 27 12:31:34 twopit last message repeated 15 times
May 27 12:32:34 twopit last message repeated 15 times
May 27 12:33:34 twopit last message repeated 15 times
May 27 12:33:58 twopit last message repeated 6 times

Re: Overkeen CDROM disk-change messages

[Harald Dunkel]

Maybe thats related to the problems with my CDROM drives (SCSI or 
IDE SCSI emulation). I cannot mount any CD with 2.4.5. kern.log says:

May 26 15:31:17 bilbo kernel: Detected scsi CD-ROM sr0 at scsi0, channel 0, id 2, lun 0
May 26 15:31:17 bilbo kernel: Detected scsi CD-ROM sr1 at scsi0, channel 0, id 4, lun 0
May 26 15:31:17 bilbo kernel: Detected scsi CD-ROM sr2 at scsi2, channel 0, id 0, lun 0
May 26 15:31:17 bilbo kernel: sr0: scsi3-mmc drive: 0x/0x cd/rw xa/form2 cdda tray
May 26 15:31:17 bilbo kernel: Uniform CD-ROM driver Revision: 3.12
May 26 15:31:17 bilbo kernel: sr1: scsi3-mmc drive: 32x/32x cd/rw xa/form2 cdda tray
May 26 15:31:17 bilbo kernel: sr2: scsi3-mmc drive: 24x/24x writer cd/rw xa/form2 cdda tray
May 26 15:31:17 bilbo kernel: VFS: Disk change detected on device sr(11,1)
May 26 15:31:17 bilbo last message repeated 3 times
May 26 15:31:17 bilbo kernel: Device 0b:01 not ready.
May 26 15:31:17 bilbo kernel:  I/O error: dev 0b:01, sector 1024

Of course I did _not_ change the CD 4 times within 1 second.


Regards

Harri

Re: Overkeen CDROM disk-change messages

[Alan Cox]

> ... ;-). This was with Linux 2.4.5, dual Pentium III, devfs, < 1GB
> memory. There was no CDROM in the drive, but I had kept the CD player
> running anyway.

magicdev bug. Not kernel

Re: Overkeen CDROM disk-change messages

[Chris Rankin]

> 
> > ... ;-). This was with Linux 2.4.5, dual Pentium III, devfs, < 1GB
> > memory. There was no CDROM in the drive, but I had kept the CD player
> > running anyway.
> 
> magicdev bug. Not kernel
> 

What's "magicdev"? I am not running GNOME or KDE. In fact, I wasn't
even running X at the time but had xmcd putting its display on another
machine over the local network.

Chris

Re: Overkeen CDROM disk-change messages

[Alan Cox]

> What's "magicdev"? I am not running GNOME or KDE. In fact, I wasn't
> even running X at the time but had xmcd putting its display on another
> machine over the local network.

Then I guess it was xmcd continually opening/failing

Re: Overkeen CDROM disk-change messages

[Harald Dunkel]

If there is no CD in the drive, why are there messages in kern.log 
about a CD change? Shouldn't it be something like 'CD drive empty'?

Harri

Re: Overkeen CDROM disk-change messages

[Alan Cox]

> If there is no CD in the drive, why are there messages in kern.log 
> about a CD change? Shouldn't it be something like 'CD drive empty'?

Because that is what the drive is reporting back to the OS