Srv 2008 R2 Hyper-v VM won't start

Hi,

I would urgently like some help please.

We have a Server 2008 R2 server running Hyper-V.

It has 1 virtual machine and it won't start after installing Windows SP1!!

I get Event ID's :
12240

'SERVER': Attachment '' could not be found due to error: 'The system cannot find the file specified.' (7864368). (Virtual machine ID C9060573-D668-414F-93EF-ADAEC649FBD9)

12010

'SERVER' Microsoft Synthetic SCSI Controller (Instance ID {92622887-131E-4949-B473-7589CA487673}): Failed to Power on with Error 'The system cannot find the file specified.' (0x80070002). (Virtual machine ID C9060573-D668-414F-93EF-ADAEC649FBD9)

12030

'SERVER' failed to start. (Virtual machine ID C9060573-D668-414F-93EF-ADAEC649FBD9)

I know very little about Hyper-V and am struggling.

I have tried restarting. I have looked at all the vhd and avhd files and they look fine.

I just cannot see why it is not behaving.

All advice welcome!

Many thanks
IT_RSLSteeperAsked:
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Subhashish LahaConnect With a Mentor Commented:
Check VM settings, it seems that you have some issue on Microsoft Synthetic SCSI Controller. One of the disk is missing from Microsoft Synthetic SCSI Controller.

If you were using pass-through disk, verify that after reboot - pass-through disk is attached.

If above doesn't help, provide screenshot of error and VM settings.
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IT_RSLSteeperAuthor Commented:
Thanks for the reply subhashishlaha.

I sorry but I am not sure if I am using pass-through disk. How can I find out?

The server was setup by a collegue who is not available till Monday and I really need it fixed by then if possible.

I went to the VM and print screened the settings, hope that is what you were after and helps.

Thanks again
Settings.png
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IT_RSLSteeperAuthor Commented:
Sorry forgot to add error message.

When I click on Start to actually start the server I get the attached error message.

Thanks
Error-Starting-server.png
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Subhashish LahaCommented:
If you see in VM settings under SCSI Controller --> Hard disk, it says "Physical Drive not found".

There was a physical disk connected on VM as pass-through disk or might a VHD.

What I feel is you would have a physical disk connected as pass-through disk from your host machine. After Host machine reboot, that disk must have got online on host due to which VM is not able to see it.

Do you remember any disk on your Host machine --> disk management used be in Offline mode?

Otherwise, you will have to contact the person who setup this VM and ask for VMs second disk (i.e. SCSI controller disk on VM).
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IT_RSLSteeperAuthor Commented:
Hi ,,
Thanks again for the reply.

I think it must have been a vhd file as I can fine the location of those files along with some avhd files which I presume are the snap shot files going by descriptions I have seen.

I have tried to select one and it gave me messages about being careful as drive can become corrupt. I tried to cancel back but it seems now I cannot unslect it.

I have just copied the vhd and avhd files to another drive on the server.

When I try and start the vm now it gives me a message about the file being in use so I am hoping a reboot might help it.

Does that sound about right even though I appreciate that is all very vague.

I really need to try and learn more about Hyper-V!

Trying to do CCNA at the moment though!

Thanks again.
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IT_RSLSteeperAuthor Commented:
I have one vhd and several avhd files.

Is there a particular one I should select to try and get the server back online?
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IT_RSLSteeperAuthor Commented:
thanks for your help subhashishlaha.

It was as you said related to the drives but sadly I wasn't able to fix myself but my boss managed it.

Thanks again.
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