Installing Ubuntu guest crashes Hyper-V host

Posted by Grant on Server Fault See other posts from Server Fault or by Grant
Published on 2012-07-05T14:34:05Z Indexed on 2012/07/05 15:17 UTC
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hyper-v

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scvmm

I have a weird problem that I don't even know where to begin diagnosing. Trying to install Ubuntu to a VM locks up the host system!

My setup is:

Dell R715 server, dual 16 core AMD opteron processors, 96GB RAM
Dell MD3600f SAN
Server 2008 R2 Datacenter
System Center VMM 2012

There are 5 windows virtual machines running that have had no problems. This is the first linux VM I've tried to create. I setup a VM through virtual machine manager, set the CD drive to a Ubuntu 12.04 server x64 iso, and started it up.

It boots up the normal ubuntu install menu, but the second I hit enter on "Install Ubuntu Server", I get disconnected.

The HOST machine stops responding to pings. So do all virtual machines on it. It locks up entirely - keyboard on the host won't work, mouse won't move, numlock light won't change.

There's no blue screen - the host is sitting at the login screen completely unresponsive. I can't find any relevant logs in event viewer after rebooting.

What could cause the host machine to freeze like that?

It's not a one time occurrence - it happens every time at the exact same point. Thank god this server isn't in production yet!

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