Problems with CBT (RCT) after upgrading to Hyper-V 2016

Hyper-V specific discussions

Problems with CBT (RCT) after upgrading to Hyper-V 2016

Veeam Logoby aalstad » Fri Jun 23, 2017 9:06 am

Case #02192834

Using 9.5 Upgrade2 on windows 2016
The host-Server is 2016 Hyper-V Edition

I have upgraded 6 servers to Hyper-V 2016, and everything was running good for some time.
But now I’m having problem with backup of one of my VM, it has 17 disk with total 74TB.

I started to get these errors:

Processing SERVER1 Error: The system cannot find the file specified. Failed to open file [D:\hyper-v\virtual hard disks\SERVER1-O_F3FAA80E-460C-4A8C-B3C7-969952F164F8.avhdx] in readonly mode. Failed to open VHDX, disk path: 'vhdx://<shadowSpec><extent path="D:\hyper-v\virtual hard disks\SERVER1-O.vhdx" shadow="D:\hyper-v\virtual hard disks\SERVER1-O.vhdx" isAutoRecovery="False" /><extent path="D:\hyper-v\virtual hard disks\SERVER1-O_F3FAA80E-460C-4A8C-B3C7-969952F164F8.avhdx" shadow="D:\hyper-v\virtual ha

I got them on 6 of the disks, and after this My backup takes 24Hours to run, and created 10Tb backup every day, compared with 700Gb before.

Backup of these 6 disks takes up to 24 hours, and the backup reads almost the whole disk.
It looks like the RCT (Native CBT) is corrupted.
I have tried to disable CBT on the backup, and it still run for 24 Hours but creates a backup of 700GB.

I have talked with Veeam Support, and I can’t say I have got any help.
All they say is try to delete the RCT and MRT files.
And to do this I have to shutdown the server.

I believe this might fix the problem now, but not the original problem.

Does anyone know of another way to reset the RCT ? Or any other help?
aalstad
Lurker
 
Posts: 1
Liked: never
Joined: Fri Jun 23, 2017 8:59 am
Full Name: Anders Alstad

Re: Problems with CBT (RCT) after upgrading to Hyper-V 2016

Veeam Logoby Andreas Neufert » Sun Jun 25, 2017 7:48 pm

As we use the Microsoft RCT and it do not work, there are 2 options. To investigate with Microsoft or to reset it (maybe something broke at upgrade?).
You asked for some additional feedback in our support case. Our support team work on this.
Andreas Neufert
Veeam Software
 
Posts: 2201
Liked: 360 times
Joined: Wed May 04, 2011 8:36 am
Location: Germany
Full Name: @AndyandtheVMs Veeam PM


Return to Microsoft Hyper-V



Who is online

Users browsing this forum: Yahoo [Bot] and 7 guests