Bug 719670 - Unable to add a detachable device
Summary: Unable to add a detachable device
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm
Version: 6.1
Hardware: Unspecified
OS: Unspecified
unspecified
high
Target Milestone: rc
: ---
Assignee: Virtualization Maintenance
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-07-07 15:59 UTC by Dmitry Konishchev
Modified: 2011-07-08 18:57 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-07-08 18:57:52 UTC
Target Upstream Version:

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Description Dmitry Konishchev 2011-07-07 15:59:50 UTC 
I run a virtual machine by executing the following command:
/usr/libexec/qemu-kvm -drive id=root_drive,file=root,if=ide,media=disk -drive id=volume_drive,file=volume,if=virtio,media=disk -device virtio-blk-pci,drive=volume_drive,id=volume

On RHEL 6.0 with qemu-kvm-0.12.1.2-2.113.el6_0.8 it works fine, but on RHEL 6.1 with qemu-kvm-0.12.1.2-2.160.el6 it fails with the following output:
qemu-kvm: -drive id=volume_drive,file=volume,if=virtio,media=disk: Property 'virtio-blk-pci.drive' can't take value 'volume_drive', it's in use

Am I misunderstanding something or device attaching is really broken?
Comment 2 juzhang 2011-07-08 02:12:58 UTC 
(In reply to comment #0)
> I run a virtual machine by executing the following command:
> /usr/libexec/qemu-kvm -drive id=root_drive,file=root,if=ide,media=disk -drive
> id=volume_drive,file=volume,if=virtio,media=disk -device
> virtio-blk-pci,drive=volume_drive,id=volume
> 
> On RHEL 6.0 with qemu-kvm-0.12.1.2-2.113.el6_0.8 it works fine, but on RHEL 6.1
> with qemu-kvm-0.12.1.2-2.160.el6 it fails with the following output:
> qemu-kvm: -drive id=volume_drive,file=volume,if=virtio,media=disk: Property
> 'virtio-blk-pci.drive' can't take value 'volume_drive', it's in use
> 
> Am I misunderstanding something or device attaching is really broken?

You CML probably wrong
you can't define interface two times
-drive id=volume_drive,file=volume,*if=virtio*,media=disk /first time/
-device virtio-blk-pci,drive=volume_drive,id=volume /second time/

Would you please try the following two methods
1.Use -drive&-device

/usr/libexec/qemu-kvm 

-drive id=root_drive,file=root,if=none,media=disk 
-device ide-drive,drive=root_drive

-drive id=volume_drive,file=volume,if=none,media=disk 
-device virtio-blk-pci,drive=volume_drive,id=volume


2.Just use -drive option
#/usr/libexec/qemu-kvm -drive id=root_drive,file=root,if=ide,media=disk -drive
id=volume_drive,file=volume,if=virtio,media=disk 

-drive
file=/root/zhangjunyi/rhel5.6-virtio-64.qcow2,if=none,id=test,cache=none,format=qcow2,werror=stop,rerror=stop
-device virtio-blk-pci,drive=test
Comment 3 Dmitry Konishchev 2011-07-08 09:56:02 UTC 
Yeah, with if=none it works great. Thanks!
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