Hyper V CentOS 5.11 VM going in saved state

Hello,

I am facing major issue with Hyper Linux machine.

It is going in saved state (getting down for 10-15 minutes) during backup.

My Linux machine OS is CentOS 5.11 with integration service 3.5 and Parent Hyper V machine OS is Windows Server 2012 Data Center.

Also I have added iscsi controller on this VM and as per below Microsoft article live backup is supported on CentOS 5.11.

http://technet.microsoft.com/en-us/library/dn531026.aspx

Please suggest me on the same to fix this issue.

Thanks,

Imran Khan.