Hi guys,
I have several HP BL460c Gen8 server with ESXi 5.1 U1 installed, and the servers were managed by vCenter Server 5.1. The problem is when i taking snapshot on a powered on VM, it takes more than 5 minutes to complete the task.But if i take snapshot on a powered off VM, the task could complete within 2 second.
I've tried to take snapshot via connect to vCenter server and connect to ESXi host directly, and the result is the same: taking snapshot on a powered on VM always takes several minutes to complete, while taking snapshot on a powered off VM only takes 1 or 2 second. Also I've tried to enable and disable write-cache on BL460c Gen8 server, nothing changed. Tried to install ESXi 5.1 WITHOUT update1, still not helping. Of course, all the ESXi image is HP oem ESXi image. I refered to the KB http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1021386&sliceId=2&docTypeID=DT…, it did reduced the time but still takes more than 30 seconds. All the VM i tested were totally free, no app is running and no app is installing, all the VMs installed the corresponding VMware tools, all the VM tested were installed with WinSvr 2008 R2 SP1.
Any suggestion?