SymptomsThe following error appears regularly in Event Viewer on the node:
An I/O operation initiated by the Registry failed unrecoverably. The Registry could not read in, or write out, or flush, one of the files that contain the system's image of the Registry.
CauseThere are two possible reasons for the problem. The first one is a corrupted registry of some VE due to NTFS corruption, and the second is a shortage of system cache on the node.
ResolutionTry to increase the system cache on the node by creating the following registry value:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
dword:LargeSystemCache = 1
Create the value and reboot the node afterward.
To check NTFS integrity of running VEs, follow the instructions described here.
Also, carefully read this article.
You must also install Virtuozzo update VZU35158 for the 3.5.1 version or VZU400004 for the 4.0 version, where system cache usage is optimized.