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Re: Disk controller type


Sooo... here is my experience:

if using correct VirtIO OS TYPE (set on template/VM) - i.e. ubuntu 14.04,
Centos 6.x or 7.x, Windows PV, other PV (but NOT centos 6.0 or 7.0 - these
"dot zero" versions are NOT virtio at least in ACS 4.8), then when VM is
STARTED FROM ACS (power on VM) - all drives should be attached as VirtIO.

BUT if you do same as above, then additionally create and HOTPLUG new
drives/volumes to KVM - it will be IDE - some strange default behavior
during hotplug action.... just stop VM/start and it will become VirtIO
again...

In order to "troubleshoot" these instances - you need to be careful to
which OS TYPE was the instance set to (this is inherited from TEMPLATE, if
you used some template - but it CAN be changed on an deployed&&stopped
instance)

In case you plan to i.e. move your Windows instances from IDE to VirtIO -
be aware that it might fail miserably, and OS will fail to boot - but there
is a fix with *"* bcdedit /set detecthal boolean (where boolean is one of 1,
 on, yes or true) " after which Windows will detect HAL again and boot just
fine.

Let me know if more help needed

Cheers

On Thu, 20 Sep 2018 at 11:22, Adam Witwicki <awitwicki@xxxxxxxxxxxxx> wrote:

>
>
> It looks like I can just add
>
> rootDiskController virtio
>
> To the templates settings tab?
>
> Can anyone confirm?
>
> Thanks
>
> Adam
>
> -----Original Message-----
> From: Ivan Kudryavtsev <kudryavtsev_ia@xxxxxxxxx>
> Sent: 20 September 2018 10:20
> To: users <users@xxxxxxxxxxxxxxxxxxxxx>
> Subject: Re: Disk controller type
>
> ** This mail originated from OUTSIDE the Oakford corporate network. Treat
> hyperlinks and attachments in this email with caution. **
>
> Rakesh, It doesn't work like that for CS as it uses stateless XML configs.
>
> чт, 20 сент. 2018 г., 16:12 Rakesh Venkatesh <www.rakeshv.com@xxxxxxxxx>:
>
> > I think you can change the controller type in XML file of the VM but
> > not sure if that works or not.
> >
> > virsh dumpxml <vm name>
> > virsh edit <vm name|domain>
> > change the controller type, save and start the vm again
> >
> > On Thu, Sep 20, 2018 at 9:59 AM Adam Witwicki
> > <awitwicki@xxxxxxxxxxxxx>
> > wrote:
> >
> > > Hello,
> > >
> > > I have a number of of instances using the wrong controller type
> > > (ATA)
> > does
> > > anyone know where this is set in the database so I can start them
> > > with
> > the
> > > VirtIO scsi controller?
> > >
> > > Thanks
> > >
> > > Adam
> > >
> > >
> > >
> > >
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> > Rakesh venkatesh
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> This email has been sent by Oakford Technology Limited, while we have
> checked this e-mail and any attachments for viruses, we can not guarantee
> that they are virus-free. You must therefore take full responsibility for
> virus checking.
> This message and any attachments are confidential and should only be read
> by those to whom they are addressed. If you are not the intended recipient,
> please contact us, delete the message from your computer and destroy any
> copies. Any distribution or copying without our prior permission is
> prohibited.
> Internet communications are not always secure and therefore Oakford
> Technology Limited does not accept legal responsibility for this message.
> The recipient is responsible for verifying its authenticity before acting
> on the contents. Any views or opinions presented are solely those of the
> author and do not necessarily represent those of Oakford Technology Limited.
> Registered address: Oakford Technology Limited, 10 Prince Maurice Court,
> Devizes, Wiltshire. SN10 2RT.
> Registered in England and Wales No. 5971519
>
>

-- 

Andrija Panić