[Qemu-devel] Problems changing dvdrom iso during execution

[Qemu-devel] Problems changing dvdrom iso during execution

[Adnan Khaleel]

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I cannot change DVD roms during execution using the monitor. I can only mount a cdrom/dvdrom if I specify the iso file in the command line 
x86_64-softmmu/qemu-system-x86_64 -hda ../../OSImages/sles11.qcow2 -cdrom ../../ISOz/mydvd.iso -m 2048

In the guest I can mount the iso image as you could normally expect
mount /dev/cdrom /mnt
mount: block device /dev/sr0 is write-protected, mounting read-only

Info block in the monitor yields
(qemu) info block
  ide0-hd0: type=hd removable=0 file../../OSImages/sles11.qcow2 ro=0   drv=dcow2 encrypted=0
  ide1-cd0: type=cdrom removable=1 locked=1 file=../../ISOz/mydvd.iso   ro=0 drv=raw encrypted=0
  floppy0: type=floppy removable=1 locked=0 [not inserted]
  sd0: type=floppy removable=1 locked=0 [not inserted]

When I try to do a eject ide0-cd0, I get a device busy message so I have to do a eject -f ide0-cd0

After which, an info block yields:
(qemu) info block
ide0-hd0: type=hd removable=0 file../../OSImages/sles11.qcow2 ro=0   drv=dcow2 encrypted=0
  ide1-cd0: type=cdrom removable=1 locked=1 [not inserted]
  floppy0: type=floppy removable=1 locked=0 [not inserted]
  sd0: type=floppy removable=1 locked=0 [not inserted]

I change the iso image with (or so it seems)

(qemu) change ide1-cd0 ../../ISOz/mydvd2_rom.iso
(qemu) info block
ide0-hd0: type=hd removable=0 file../../OSImages/sles11.qcow2 ro=0 drv=dcow2 encrypted=0
ide1-cd0: type=cdrom removable=1 locked=1 file=../../ISOz/mydvd2.iso ro=0 drv=raw encrypted=0
floppy0: type=floppy removable=1 locked=0 [not inserted]
sd0: type=floppy removable=1 locked=0 [not inserted]

I go back to the guest and when I try to mount:

mount /dev/cdrom /mnt 
mount: /dev/sr0 unknown device

I'm running sles11 as guest and I think it may have something to do with sles11 as it works fine with ubuntu9.

Any ideas what might be happening?

Thanks

AK

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Re: [Qemu-devel] Problems changing dvdrom iso during execution

[David S. Ahern]

On 05/20/2010 02:29 PM, Adnan Khaleel wrote:
> I cannot change DVD roms during execution using the monitor. I can only
> mount a cdrom/dvdrom if I specify the iso file in the command line
> x86_64-softmmu/qemu-system-x86_64 -hda ../../OSImages/sles11.qcow2
> -cdrom ../../ISOz/mydvd.iso -m 2048
> 
> In the guest I can mount the iso image as you could normally expect
> mount /dev/cdrom /mnt
> mount: block device /dev/sr0 is write-protected, mounting read-only
> 
> Info block in the monitor yields
> (qemu) info block
> ide0-hd0: type=hd removable=0 file../../OSImages/sles11.qcow2 ro=0
> drv=dcow2 encrypted=0
> ide1-cd0: type=cdrom removable=1 locked=1 file=../../ISOz/mydvd.iso ro=0
> drv=raw encrypted=0
> floppy0: type=floppy removable=1 locked=0 [not inserted]
> sd0: type=floppy removable=1 locked=0 [not inserted]
> 
> When I try to do a eject ide0-cd0, I get a device busy message so I have
> to do a eject -f ide0-cd0
> 
> After which, an info block yields:
> (qemu) info block
> ide0-hd0: type=hd removable=0 file../../OSImages/sles11.qcow2 ro=0
> drv=dcow2 encrypted=0
> ide1-cd0: type=cdrom removable=1 locked=1 [not inserted]
> floppy0: type=floppy removable=1 locked=0 [not inserted]
> sd0: type=floppy removable=1 locked=0 [not inserted]
> 
> I change the iso image with (or so it seems)
> 
> (qemu) change ide1-cd0 ../../ISOz/mydvd2_rom.iso
> (qemu) info block
> ide0-hd0: type=hd removable=0 file../../OSImages/sles11.qcow2 ro=0
> drv=dcow2 encrypted=0
> ide1-cd0: type=cdrom removable=1 locked=1 file=../../ISOz/mydvd2.iso
> ro=0 drv=raw encrypted=0
> floppy0: type=floppy removable=1 locked=0 [not inserted]
> sd0: type=floppy removable=1 locked=0 [not inserted]
> 
> I go back to the guest and when I try to mount:
> 
> mount /dev/cdrom /mnt
> mount: /dev/sr0 unknown device
> 
> I'm running sles11 as guest and I think it may have something to do with
> sles11 as it works fine with ubuntu9.
> 
> Any ideas what might be happening?

Does it work if the guest uses ide based CD's:
rmmod ide-scsi
modprobe ide-cd

David


> 
> Thanks
> 
> AK

Re: [Qemu-devel] Problems changing dvdrom iso during execution

[Adnan Khaleel]

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Thanks for your response.
  
  Does it work if the guest uses ide based CD's:
  rmmod ide-scsi
  modprobe ide-cd
  
  There isn't an ide-scsi but there is a scsi_mod and when I try to remove that it gives
ERROR: Module scsi_mod is in use by sr_mod,sg,sd_mod,libata

modprobe ide-cd seems to work. 

However it doesn't fix the problem. 

Interestingly, before doing modprobe ide-cd, 
linux> lsmod | grep ide 
ide_pci_generic     4652    0
ide_core              115068 2 ide_pci_generic, piix

After the modprobe ide-cd, I get
ide_cd_mod      33984    0
cdrom              36200    2  ide_cd_mod, sr_mod
ide_pci_generic     4652    0
  ide_core              115068 3 ide_cd_mod, ide_pci_generic, piix


  

  

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Re: [Qemu-devel] Problems changing dvdrom iso during execution

[David S. Ahern]

On 05/20/2010 03:48 PM, Adnan Khaleel wrote:
> Thanks for your response.
> 
> 
>     Does it work if the guest uses ide based CD's:
>     rmmod ide-scsi
>     modprobe ide-cd
> 
> There isn't an ide-scsi but there is a scsi_mod and when I try to remove
> that it gives
> ERROR: Module scsi_mod is in use by sr_mod,sg,sd_mod,libata
> 
> modprobe ide-cd seems to work.

Ok, I pulled those from a RHEL3 VM. Looks like SLES11 is using a newer
2.6 kernel. The idea I was poking at was to get the CD in the VM to go
through the ide-cd layer and not the ata/scsi route. I had to do that
for my RHEL3 guest to get some consistency with the DVD -- similar to
the problem you are seeing.

David

> 
> However it doesn't fix the problem.
> 
> Interestingly, before doing modprobe ide-cd,
> linux> lsmod | grep ide
> ide_pci_generic     4652    0
> ide_core              115068 2 ide_pci_generic, piix
> 
> After the modprobe ide-cd, I get
> ide_cd_mod      33984    0
> cdrom              36200    2  ide_cd_mod, sr_mod
> ide_pci_generic     4652    0
> ide_core              115068 3 ide_cd_mod, ide_pci_generic, piix
> 
> 
> 
> 

Re: [Qemu-devel] Problems changing dvdrom iso during execution

[Adnan Khaleel]

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So do you have any idea whats causing the problem? Is there any other way I can mount a dvd in Qemu?

Adnan

  _____  

From: David S. Ahern [mailto:daahern@cisco.com]
To: adnan@khaleel.us
Cc: Qemu-devel@nongnu.org
Sent: Thu, 20 May 2010 17:45:11 -0500
Subject: Re: [Qemu-devel] Problems changing dvdrom iso during execution


  
  On 05/20/2010 03:48 PM, Adnan Khaleel wrote:
  > Thanks for your response.
  > 
  > 
  >     Does it work if the guest uses ide based CD's:
  >     rmmod ide-scsi
  >     modprobe ide-cd
  > 
  > There isn't an ide-scsi but there is a scsi_mod and when I try to remove
  > that it gives
  > ERROR: Module scsi_mod is in use by sr_mod,sg,sd_mod,libata
  > 
  > modprobe ide-cd seems to work.
  
  Ok, I pulled those from a RHEL3 VM. Looks like SLES11 is using a newer
  2.6 kernel. The idea I was poking at was to get the CD in the VM to go
  through the ide-cd layer and not the ata/scsi route. I had to do that
  for my RHEL3 guest to get some consistency with the DVD -- similar to
  the problem you are seeing.
  
  David
  
  > 
  > However it doesn't fix the problem.
  > 
  > Interestingly, before doing modprobe ide-cd,
  > linux> lsmod | grep ide
  > ide_pci_generic     4652    0
  > ide_core              115068 2 ide_pci_generic, piix
  > 
  > After the modprobe ide-cd, I get
  > ide_cd_mod      33984    0
  > cdrom              36200    2  ide_cd_mod, sr_mod
  > ide_pci_generic     4652    0
  > ide_core              115068 3 ide_cd_mod, ide_pci_generic, piix
  > 
  > 
  > 
  > 
    

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Re: [Qemu-devel] Problems changing dvdrom iso during execution

[David S. Ahern]

On 05/21/2010 10:10 AM, Adnan Khaleel wrote:
> So do you have any idea whats causing the problem? Is there any other
> way I can mount a dvd in Qemu?
> 
> Adnan

have you tried ejecting the cd in the guest before changing the file in
the monitor?

David

Re: [Qemu-devel] Problems changing dvdrom iso during execution

[Adnan Khaleel]

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Tried that, still the same. 

My current workaround is to mount all the DVD iso files as separate hard disks and mount those. This worked but its a workaround at best. Not sure what I'd do if ever had to access more then 3 dvd's at a time - which I doubt should happen anytime soon.


  _____  

From: David S. Ahern [mailto:daahern@cisco.com]
To: adnan@khaleel.us
Cc: Qemu-devel@nongnu.org
Sent: Fri, 21 May 2010 13:47:00 -0500
Subject: Re: [Qemu-devel] Problems changing dvdrom iso during execution


  
  On 05/21/2010 10:10 AM, Adnan Khaleel wrote:
  > So do you have any idea whats causing the problem? Is there any other
  > way I can mount a dvd in Qemu?
  > 
  > Adnan
  
  have you tried ejecting the cd in the guest before changing the file in
  the monitor?
  
  David
    

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Re: [Qemu-devel] Problems changing dvdrom iso during execution

[Natalia Portillo]

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Have you tried any other operating system or kernel revision?

I have just changed the iso with change ide1-cd0 command in Windows XP Upgrade (it asks to insert a previous Windows CD and then reinsert the XP one) without any kind of problem, in QEMU 0.12.4.

El 21/05/2010, a las 20:42, Adnan Khaleel escribió:

> Tried that, still the same. 
> 
> My current workaround is to mount all the DVD iso files as separate hard disks and mount those. This worked but its a workaround at best. Not sure what I'd do if ever had to access more then 3 dvd's at a time - which I doubt should happen anytime soon.
> 
> 
> From: David S. Ahern [mailto:daahern@cisco.com]
> To: adnan@khaleel.us
> Cc: Qemu-devel@nongnu.org
> Sent: Fri, 21 May 2010 13:47:00 -0500
> Subject: Re: [Qemu-devel] Problems changing dvdrom iso during execution
> 
> 
> 
> On 05/21/2010 10:10 AM, Adnan Khaleel wrote:
> > So do you have any idea whats causing the problem? Is there any other
> > way I can mount a dvd in Qemu?
> > 
> > Adnan
> 
> have you tried ejecting the cd in the guest before changing the file in
> the monitor?
> 
> David


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Re: [Qemu-devel] Problems changing dvdrom iso during execution

[Adnan Khaleel]

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It works in ubuntu 9.10. When I mount the CDROM the first time it  
mounts fine. After I change the iso file and mount, it spits out a  
bunch of messages but it does mount the drive. I think this problem  
might be specific to sles11.





On May 21, 2010, at 5:37 PM, Natalia Portillo <claunia@claunia.com>  
wrote:

> Have you tried any other operating system or kernel revision?
>
> I have just changed the iso with change ide1-cd0 command in Windows  
> XP Upgrade (it asks to insert a previous Windows CD and then  
> reinsert the XP one) without any kind of problem, in QEMU 0.12.4.
>
> El 21/05/2010, a las 20:42, Adnan Khaleel escribió:
>
>> Tried that, still the same.
>>
>> My current workaround is to mount all the DVD iso files as separate  
>> hard disks and mount those. This worked but its a workaround at  
>> best. Not sure what I'd do if ever had to access more then 3 dvd's  
>> at a time - which I doubt should happen anytime soon.
>>
>>
>> From: David S. Ahern [mailto:daahern@cisco.com]
>> To: adnan@khaleel.us
>> Cc: Qemu-devel@nongnu.org
>> Sent: Fri, 21 May 2010 13:47:00 -0500
>> Subject: Re: [Qemu-devel] Problems changing dvdrom iso during  
>> execution
>>
>>
>>
>> On 05/21/2010 10:10 AM, Adnan Khaleel wrote:
>> > So do you have any idea whats causing the problem? Is there any  
>> other
>> > way I can mount a dvd in Qemu?
>> >
>> > Adnan
>>
>> have you tried ejecting the cd in the guest before changing the  
>> file in
>> the monitor?
>>
>> David
>

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Re: [Qemu-devel] Problems changing dvdrom iso during execution

[Natalia Portillo]

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Would you please test on SLES11 with another kernel revision?

Possible, with various one, both lower and upper?

El 22/05/2010, a las 00:45, Adnan Khaleel escribió:

> It works in ubuntu 9.10. When I mount the CDROM the first time it mounts fine. After I change the iso file and mount, it spits out a bunch of messages but it does mount the drive. I think this problem might be specific to sles11. 
> 
> 
> 
> 
> 
> On May 21, 2010, at 5:37 PM, Natalia Portillo <claunia@claunia.com> wrote:
> 
>> Have you tried any other operating system or kernel revision?
>> 
>> I have just changed the iso with change ide1-cd0 command in Windows XP Upgrade (it asks to insert a previous Windows CD and then reinsert the XP one) without any kind of problem, in QEMU 0.12.4.
>> 
>> El 21/05/2010, a las 20:42, Adnan Khaleel escribió:
>> 
>>> Tried that, still the same. 
>>> 
>>> My current workaround is to mount all the DVD iso files as separate hard disks and mount those. This worked but its a workaround at best. Not sure what I'd do if ever had to access more then 3 dvd's at a time - which I doubt should happen anytime soon.
>>> 
>>> 
>>> From: David S. Ahern [mailto:daahern@cisco.com]
>>> To: adnan@khaleel.us
>>> Cc: Qemu-devel@nongnu.org
>>> Sent: Fri, 21 May 2010 13:47:00 -0500
>>> Subject: Re: [Qemu-devel] Problems changing dvdrom iso during execution
>>> 
>>> 
>>> 
>>> On 05/21/2010 10:10 AM, Adnan Khaleel wrote:
>>> > So do you have any idea whats causing the problem? Is there any other
>>> > way I can mount a dvd in Qemu?
>>> > 
>>> > Adnan
>>> 
>>> have you tried ejecting the cd in the guest before changing the file in
>>> the monitor?
>>> 
>>> David
>> 


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