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SFlanders Posts

The Virtual Disk Is Either Corrupted Or Not A Supported Format

Another interesting VMware issue came up this week. I was in the process of reconfiguring some ESX hosts and as such was forced to put these hosts in maintenance mode. As it turns out, one VM was located on the local storage of an ESX host and as such, I attempted to perform a Storage vMotion so the maintenance mode request would be successful. After about 20% completion, vCenter Server displayed the following error message, “The virtual disk is either corrupted or not a supported format.”

How do you troubleshoot this problem?

VMware VI 3 End of Support

In addition to patching your VMware environment it is important to note the VMware Life Cycle Policy and when an upgrade to a major, minor, or maintenance release is required to continue receiving general support, extended support, and technical guidance from VMware. In this post I will be focusing specifically on VMware Infrastructure 3, but this information will apply to all VMware products so be sure to check the VMware site for the latest information.

Phantom VM

For those of you who do not know, I am a VMware fanatic. From time to time, I will be posting blog entries on discoveries I have made, problems I have resolved, and general knowledge I would like to share. Last week, an interesting problem was brought to my attention.
A colleague called me who was in the process of rebuilding an environment after a RAID crashed due to multiple failed drives .This was a testing environment so no monitoring was in place and no backups were kept. At the time, my colleague was redeploying software firewalls and ran into an issue of the firewalls refusing to cluster together. After investigating the logs, it appeared that a duplicate IP was causing the problem. A network engineer traced the MAC address through the switch fabric and found the duplicate IP coming from a VM port group NIC on one of the ESX servers. All VMs were checked on that host, but none of them had the IP address in question. So where was the phantom VM?

The Joomla Transition

I would like to start by thanking everyone for the feedback on the new site! I have taken your comments, questions, and suggestions and made several modifications. One common problem appeared to be the use of the comment feature and as such I have switched to a different application and welcome any feedback on its functionality. I have been doing extensive testing on multiple browsers to ensure that everything is working properly and it this point I believe the only outstanding issues are the voting AJAX functionality on IE6 and the mobile browser layout of the site.
I decided it would be a good idea to start my blogging experience by talking about my website transition. Over the years, my site has changed from HTML+CSS to PHP then into a wiki and now a CMS. PmWiki was my favorite type of website to deploy, but I wanted to try something new. The main reasons for this include the ease of installation, the ability to edit pages through the web browser, the wide range of scripts (called cookbooks), and the functionality to write code in order to overcome limitations of the system. A couple drawbacks to PmWiki included the “hacks” needed to get some features to work (i.e. SSL for edit and login functions only), the need to learn or constantly look up the wiki syntax (problem of every wiki), and the non-Web 2.0 look and feel. With over five years of experience in PmWiki, I feel I have mastered it and while I will likely continue to use this product for side projects I wanted to try something new that is hopefully easier to use for advanced functions.