{"id":9134,"date":"2008-07-21T14:28:00","date_gmt":"1999-11-29T20:00:00","guid":{"rendered":"https:\/\/aidanfinn.com\/?p=9134"},"modified":"2008-07-21T14:28:00","modified_gmt":"1999-11-29T20:00:00","slug":"beware-anti-virus-and-hyper-v","status":"publish","type":"post","link":"https:\/\/aidanfinn.com\/?p=9134","title":{"rendered":"Beware Anti-Virus and Hyper-V"},"content":{"rendered":"

I released the July updates onto our network this past weekend.\u00a0 I’d also deployed our new AV the previous week.\u00a0 Let’s just say that AV mixed with Hyper-V and followed by a reboot made for a nice mess.<\/p>\n

I logged into the Hyper-V lab this morning to find half of my VM’s were missing.\u00a0 They’re sitting find (but idle) on the storage.\u00a0 It’s just Hyper-V has "forgotten" that they ever existed.<\/p>\n

I trawled through the Windows Event logs (Application and Service logs – Microsoft – Windows – Hyper-V-Config – Admin) and found a series of these:<\/p>\n

Source: Hyper-V-Config<\/em><\/p>\n

Event ID: 4096<\/em><\/p>\n

Level: Error<\/em><\/p>\n

The Virtual Machines configuration <big long GUID> at <path to VM> is no longer accessible: The requested operation cannot be performed on a file with a user-mapped section open. (0x800704C8)<\/em><\/p>\n

Ok.\u00a0 A bit of googling found an entry on the TechNet forums that says you need to disable scanning for the VHD’s and the XML files of your VM’s.\u00a0 Ouch!<\/p>\n

OK, so I did that and rebooted by lab server.\u00a0 Still no dice.\u00a0 Actually, Hyper-V doesn’t even bother attempting to load these VM’s now.\u00a0 OK, I’ll do what I would in any other virtualisation product; I’ll open them.\u00a0 Ick … no open command.\u00a0 Import?\u00a0 Nope; because MS in their wisdom (!) decided that the import\/export format should be different to that of a normal VM.\u00a0 <\/p>\n

So I’ve got a plethora of VM’s that are sitting on my disk in a saved state that I cannot load up.\u00a0 My only way forward is to re-add the virtual hard disks as new VM’s.\u00a0 This is a pain:<\/p>\n