Let’s say you have old shelves of either EMC or NetApp with SAS or SATA disks in them. And let’s say you want to connect them via FC to a Linux machine and have some nice ZFS machine/cluster, or whatever else. There are few things to know, and to attend in order for it to…
While searching the web for how to perform PCI-Passthrough on XenServers, we mostly get info about previous versions. Since I have just completed setting up PCI-Passthrough on XenServer version 6. 5 (with recent update 8, just to give you some notion of the exact time frame), I am sharing it here. Hardware: Cisco UCS blades,…
I wanted to write down a guide for RHCS on RHEL/Centos6 and XenServer. If you want to do that, you need to go through two major challenges which you will encounter. I want to save on the search and sum it all up together here. The first difficulty is the shared disk. In order to…
When using Ricci as the engine for ‘cman_tool version -r’ command, you will experience timeouts (and practically – you will be unable to use ricci to update the cluster configuration across the nodes) when the ricci user password contains XML-sensitive characters, like <>&, etc. As they say – FYI 🙂
I was wandering for a long while about the connection between NetApp’s LUN Serial and the identifier the host sees, aka “Word 83”. There was an obvious connection, but I figured it out only today. The LUN Serial is an ASCII representation of the hexadecimal Word 83, or, to be exact, the last 22 hex…
Following some unknown problems, I had recently several XenServer machines (different clusters, different sites and customers, and even different versions) with a VDI-END-of-File issues. It means that while you can start the VM correctly, perform XenMotion to another server you are unable to do any storage-migration task – neither Storage XenMotion, nor VDI copy or…
