I implemented recently VMware Data Recovery for a quick and dirty backup of a few virtual machines. After checking the backup, the most virtual machines ran properly but one virtual machine failed with the following error message: “Unable to access file <unspecified filename> since it is locked”, combined with an error message inside the VDR … Read more
VMware Data Recovery: Consider the Blocksize of the VDR Datastore
March 18th, 2010 | Posted by in General - (0 Comments)Cannot register your CapacityIQ Appliance: Another CIQ is registered to VC
March 16th, 2010 | Posted by in General - (0 Comments)During my CapacityIQ hands-on I reinstalled my CapacityIQ VA. The problem is that I have forgotten to uninstall / unregister the appliance inside vCenter server first. After reinstallation I wanted to register the CapacityIQ appliance again in vCenter, which failed with the following error: “Another CIQ is registered to VC. Unregister it or register with … Read more
Remove Orphaned Extensions / Plugins in vCenter
March 16th, 2010 | Posted by in VMware | VMware vSphere - (0 Comments)During my lab tests with CapacityIQ, vShield Zones and Appspeed I haven’t uninstalled all extensions in the vCenter before the destruction of the virtual appliances, so some orphaned entries are shown inside the plugin tabs. I watched around how I get rid of these entries, and I found the following article in the Malaysia VMware … Read more
ESX 4.x: Network Issues (Transmit Timed Out)
March 10th, 2010 | Posted by in VMware | VMware vSphere - (0 Comments)Yesterday I had a weird network issue at one of our customers: An ESX Host has lost the connection to the vCenter server and was marked as “disconnected”. The host was running as well as the virtual machines (checked via console), a reconnect to the vCenter was not possible. Further investigations obtained that even some … Read more
Powershell: How to Connect to your vCenter in a Secure Way
March 5th, 2010 | Posted by in Powershell | VMware - (0 Comments)Powershell in combination with the VI Toolkit are a very nice way to automate tasks in your virtual infastructure. While the most actions are executed via the vCenter, it is very important not to connect with a clear-text password somewhere in your scripts. If you schedule tasks or run scripts without user interaction, this may … Read more
Powershell: Collect ESX Logs and Summarize them in HTML
February 25th, 2010 | Posted by in Powershell | VMware - (0 Comments)Recently I have written a little powershell script to obtain vmkwarning logfiles from all ESX hosts in a vCenter. The output is written in a table to a html file, grouped by cluster. In each cluster the logfiles are merged, so in case of troubleshooting it is much easier to compare / combine the host … Read more
Don’t mess with Volume Names (Keep it Unique!)
January 18th, 2010 | Posted by in VMware | VMware VI3 | VMware vSphere - (0 Comments)In the last days I was confronted several times with the same problem, so I decided to write a few lines about this issue: After an upgrade of ESX 3.x to ESX 3.5 U5 or ESX 4.0 U1Â suddently some Datastores were missing even if the corresponding LUN IDs are shown with esxcfg-mpath or esxcfg-scsidevs. … Read more
How to force to mount a datastore with vSphere without resignature
November 27th, 2009 | Posted by in VMware vSphere - (0 Comments)I have just discovered an interesting article at the VMware knowledgebase, “Force mounting a VMFS datastore residing on a snapshot LUN results in the error: Cannot change the host configuration” It describes how a datastore can be mounted and unmounted, while not changing its UUID. This has to be done e.g. if a LUN is … Read more
After a long time I have updated my blog with the an actual wordpress, further I changed the whole theme (may change again, because with some things I’m not so happy at the moment). I decided to switch the blog language completely to english, to reach more people. The most interesting articles will be translated … Read more
XenServer 5.5: Issues during the Installation of new Windows VMs
July 31st, 2009 | Posted by in Citrix XenServer - (0 Comments)In the acutal Version of Citrix’s XenServer, a few problems may occur during the installation of Windows-based Virtual Machines. It may happen, that during the setup of Windows the VM freezes at the identification of the new hardware. The whole issue was already discussed in a thread of the Citrix Knowledge Center. Many users had … Read more
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