Error 800704C8 on Backup

[cohagan]

My first attempted Win7 backup ended in failure after grinding away for several hours. I was doing a backup + image and it failed with Error 800704c8 (see attachment for details.) I was backing up to a network share.

Any ideas?

Thanks,
 Bill

[attachment deleted by admin]

[riso]

Maybe this is from some help:

Error 0×800704C8 in VMM
March 23rd, 2009 Posted in Forefront, Hyper-V, Microsoft, Security
I was trying to deploy a new virtual machine today via Virtual Machine Manager, and kept getting this error (names changed to protect the innocent):

Error (12700)
VMM cannot complete the Hyper-V operation on the [virtualhost.domain.com] server because of the error: ‘[VIRTUALGUEST]‘ failed to add device ‘Microsoft Emulated Ethernet Port’. (Virtual machine ID 26DD8B56-0594-446A-8084-405218737EB0)

The Virtual Machines configuration 26DD8B56-0594-446A-8084-405218737EB0 at ‘J:\VS\[VIRTUALGUEST]‘ is no longer accessible: The requested operation cannot be performed on a file with a user-mapped section open. (0×800704C8)
(Unknown error (0×8000))

Recommended Action
Resolve the issue in Hyper-V and then try the operation again.
Well, that’s really good advice – clear the error and try again.  So, a quick Google-ing turned up a Microsoft KB article: Creating or starting a Hyper-V virtual machine on Windows Server 2008 or Microsoft Hyper-V Server 2008 may fail with error: 0×800704C8.  Oddly enough, this was exactly my issue:

CAUSE

This issue can be caused by antivirus software that is installed in the parent partition and the real-time scanning component is configured to monitor the Hyper-V virtual machine files.

RESOLUTION

To resolve this issue, configure the real-time scanning component within the antivirus software to exclude the following directories and files:

•Default virtual machine configuration directory (C:\ProgramData\Microsoft\Windows\Hyper-V)
•Custom virtual machine configuration directories
•Default virtual hard disk directory (C:\Users\Public\Documents\Hyper-V\Virtual Hard Disks)
•Custom virtual hard disk directories
•Snapshot directories
•Vmms.exe
•Vmwp.exe
Notes:

•If virtual machines are missing from the Hyper-V Management console, you must configure the antivirus exclusions, and then restart the Hyper-V Virtual Machine Management service.
•If the error code was 0×800704C8, it is likely that the virtual machine configuration file was corrupted and the virtual machine may need to be re-created or restored from backup if restarting the Hyper-V Virtual Machine Management service does not resolve the issue.
Chalk one up for Microsoft KB articles.  Now, a little further down in the KB article, it suggests (per Planning for Hyper-V Security) installing the antivirus on the guest (which we do) and not on the host (which we do, too):

Do not run any applications in the parent partition. Run all applications on virtual machines, which use child partitions. For example, if antivirus is required, be sure to run it on the VMs rather than the parent partition. Keeping the parent partition free of applications and running on a Windows Server 2008 core installation means fewer host updates, since nothing needs software updates except the Windows Server 2008 core installation, the Hyper-V service components, and the small (~600KB) hypervisor.

[cohagan]

riso
  Thanks for the response.  Unfortunately my problem has absolutely nothing to do with Hyper-V or virtual machines. While the reference to AV software is possibly instructive it doesn't really provide any guidance for the non VM problem; furthermore, I'm not about to disable my AV so I can do a backup! (Also, would MS provide a Backup solution that wouldn't work in the presence of AV software in Windows 7?)

Regards,
 Bill

[riso]

Nasty Error.. and known from Server 2000 and Vista and... now Windows 7

A real solution is nowhere to be found and the cause(s) could be numerous.

So try a few of these (or contact Microsoft to help you out on this Errror):

1) please try to perform a clean boot and check
whether the issue occurs under clean boot:

Please do as follows:

1. Click Start->Run...->type msconfig and press Enter
2. Click Services tab and select Hide All Microsoft Services and Disable
All third party Services.
3. Click Startup tab and Disable All startup items
4. Click OK and choose Restart
5. After reboot, check whether the problem still occurs

==============

2)See if there are any remnants of a previously attempted migration (look
for the MCSDMSG.DLL file.)

If it is there - see if you can delete it. If you cannot delete it, try
to rename it. If successful, then re-attempt the migration.

=============

3)Try this in case it's installed!: Open One Care and click on "Change Settings".  Disable your spyware filter temporarily.  One Care will go red, but ignore it.
or:
Microsoft Security Essentials provides real-time protection turn it temp. off

I've ran out on ideas so I hope this will help a bit