“No host data available” Reported in Hardware Status Tab

Just noticed a issue that nothing reported in ‘Hardware Status‘ tab of ESXi hosts in vSphere Web Client. KB 2112847 gives a solution but not works for me. The feature can be used to monitor hardware failures. I figured out a way to workaround it. You just need to login by Administrator account and click ‘Update‘ button under ‘Monitor‘ – ‘Hardware Status‘ for each ESXi host. You will get the status after few minutes.

Host Cannot Download Files From VMware vSphere Update Manager Patch Store

You may see following error when you scanning ESXi hosts by vCenter Update Manager.

Host cannot download files from VMware vSphere Update Manager patch store. Check the network connectivity and 
firewall setup, and check esxupdate logs for details.

You also see similar logs in /var/log/esxupdate.log.

[Errno -2] Name or service not known

The root cause could be following:

  1. ESXi host cannot resolve DNS name of vCenter Update Manager Server.
  2. One of the DNS servers incorrect if you set multiple DNS servers on ESXi host.

Transparent Page Sharing (TPS) is disabled by default in latest ESXi 5.5 patch

I just heared Transparent Page Sharing (TPS) is disabled by default in latest ESXi 5.5 patch. You may concern about that if your IT budget is tight since it means you need more memory for heavy virtual machines.

听说ESXi 5.5最新的patch里把TPS禁用了,专门研究了一下。觉得这对IT预算紧张的企业可能是个坏消息,因为这意味着你需要更多的内存应付大型虚拟机。

Continue reading “Transparent Page Sharing (TPS) is disabled by default in latest ESXi 5.5 patch”

Incompatible device backing specified for device ‘x’

It’s easy to find a solution for this particular problem. VMware has a KB for this error. Somehow it’s not my case. I don’t know what’s the exactly root cause but you can try vMotion the virtual machine to other host and give a try.

Chinese Version
这个问题的解决方案很容易找到,VMware有一个知识库。但不知道为什么,我遇到的问题没法用此知识库解决。我通过vMotion虚拟机到其他ESXi 主机解决此问题,也不知道具体原因是什么。