How PDL (Permanent Device Loss) looks like

Some time ago differentiation between PDL (Permanent Device Loss) and APD (All Path Down) was introduced to vSphere. In a PDL situation, the hosts does not expect the device to return. PDL happens for example, when an administrator unpresents a LUN from a host. APD on the other hand is completely unplanned. By default the host tries to get the device back. Starting with vSphere 6.0 there are settings in a HA-Cluster for response to PDL and APD. This post gives some information about the different settings, what happens to VMs with more than one VMDK, custom alarm creation and more.

Continue reading “How PDL (Permanent Device Loss) looks like”

How PDL (Permanent Device Loss) looks like

Mount HP Blade enclosure DVD on VMs

Mounting a HP BladeSystem enclosre DVD drive on a VM sounds easy. And it is, but it is not that easy as I thought first. Technically it is a USB drive for the host, but it is not possible to pass through the device as a USB drive. This post describes the steps to take for windows VMs (tested for Windows 2008 and 2012), but this should also work for other OSs.

Continue reading “Mount HP Blade enclosure DVD on VMs”

Mount HP Blade enclosure DVD on VMs