Windows 8 backup (Win7 File Recovery system image) creation to NAS device fails with error 0x807800C5

Question

Hi,
I have a ZyXEL NSA310 NAS device on my network that I use for backups (as well as a media server). I have been very happy with it as, amongst other things, it has a gigabit Ethernet connection. I recently upgraded my home laptop from Win7 Pro to Win8
Pro. Under Win7 the NAS device worked perfectly as the backup target. I could back up file sets and - most importantly to me - create a system image on the device should I need to restore the system in the event of a full disk failure.
When I upgraded to Win8 it kept the Win7 settings and it looked like it was just going to work, then as it came to create the system image it failed with error code 0x807800C5 and message "The version does not support this version of the file format".
I have searched the internet and seen that others have had similar issues on Win7 and Win8 with NAS devices where they have had to hack the device to get it working - though it isn't clear that this has been successful for everyone. This isn't an option
for me as the NSA310 is a closed device and in any event I don't see why I should have to hack the device when clearly this is a Win8 issue (since Win7 worked perfectly).
Does anyone have any ideas how to fix this issue so that I can create the full backups I require?
Thanks,
Phil
Event Log messages:
Log Name:      Application
Source:        Microsoft-Windows-Backup
Date:          13/01/2013 23:14:52
Event ID:      517
Task Category: None
Level:         Error
Keywords:     
User:          SYSTEM
Computer:      Home-Laptop
Description:
The backup operation that started at '‎2013‎-‎01‎-‎13T23:13:43.523158000Z' has failed with following error code '0x807800C5' (There was a failure in preparing the backup image of one of the volumes in the backup set.). Please review the event details for a
solution, and then rerun the backup operation once the issue is resolved.
Log Name:      Application
Source:        Windows Backup
Date:          13/01/2013 23:14:56
Event ID:      4104
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      Home-Laptop
Description:
The backup was not successful. The error is: There was a failure in preparing the backup image of one of the volumes in the backup set. (0x807800C5).

Answer 1

Thanks willis! I will look into the iSCSI route. A quick Google search and I can see some mention of the NSA310 and iSCSI so maybe it does support it.
One question: Have you ever attempted to restore a system image from a NAS iSCSI device with a Win8 Restore Disk? Is it easy? I just want to be sure that it is possible to do so in case the worst happens and I need to restore the entire image onto a
new disk.
Hopefully Microsoft will fix the issue with the standard NAS setup with an update in the future, but I don't want to wait for it.
Thanks again,
Phil
Hi Phil,  No I have not had to do this yet, but I see no reason why it shouldn't work as the iSCSI disk looks just like a regular hard disk to the OS. I agree that Microsoft should fix the direct NAS support as the iSCSI approach does have the downside
of dedicating a fixed chunk of your NAS drive to the iSCSI disk that you have to choose when you create the disk whereas the direct NAS just uses the actual space currently needed by the backup. Also I had some trouble getting authentication (access rights)
to work so I left the iSCSI portal as open access - which is OK for a home solution but not a good idea in general. I will revisit this for my own setup and see if I can get it working but just wanted to mention it in case you have the same issue. It manifests
itself as not being able to connect to the iSCSI portal due to failed authentication when running iSCSI initiator setup.
-willis