Virtual Machines status Unknown

[haimbeyhan]

I started having a problem with Virtual Center after upgrading all the environment to 5.1.

My virtual machines suddenly get disconnected.

When I check the vm list I see machine name (inaccessible) and the status Unknown. The only workaround is remove from inventory and add it again.

I see that all the inaccessible machines are powered off.

We're running 6 blade servers all running Vsphere 5.1i and Virtual Center 5.1 Standard as a virtual machine.

Before the upgrade we were using Vsphere 4.1i u2 with Vcenter 4.1u2 but a as a physical server and we didn't face such problems.

Thanks,

Haim Beyhan

[dave330i]

Your hosts are having problems talking to the SAN.

[haimbeyhan]

I didn't have such problems before and if my hosts are having problems

then why all the vm's are not disconnected and only some of the powered off ones and I can surely say that the vm's are not from specific host.

Haim