Tips to recover Snapshot problem on VM

Posted on June 29th, 2009 in Tips, Virtualization | 1 Comment »

You may had experienced the snapshot problem when the snapshot delta virtual disk had become huge which is more than 20GB and is not able to be truncated by removing all the snapshot. Usually the problem occur when the snapshot is no longer available from snapshot manager, but you can see the delta files available from the command prompt or physical folder that contain the Virtual machine images. I experienced the 2nd time now which I am not able to remove the snapshot on a particular virtual machine from snapshot manager and command prompt. The production virtual machine was powered off due to disk full on the specify datastore. This virtual machine contain a previous snapshot which taken 2 weeks before and yet to be truncated. The delta disk had grown up to >20 GB and fully fill up the available space within the data store.

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Manual commit snapshots delta file to vmdk flat file

Posted on March 4th, 2009 in Tips, Virtualization | 17 Comments »

I had a tough time this week to deal with the snapshot issue with one of the VM. The VM is containing an important snapshot that previously taken for system restoration. When I browsed through the snapshot manager from vCenter, the system show my VM was running without any snapshots. Here was the kicked start of my problem and excited journey until I managed to recover it this morning.

I tried to SSH to the ESX host and browse to the specified datastore, and I found the snapshot file which end with file extension .vmsn were available in the correct location. No matter how many times I tried and rebooted my Virtual center, the snapshot were not visible to the snapshot manager still.

I read through some articles and forums which suggested to clone the snapshot by using vmkfstools -i option, but it didn’t success in my case here, and I continue my research and here I found a useful blog post from 1 of the blogger  Oliver O’Boyle who experienced similar issue previously.
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VMFS LUNs Report

Posted on December 4th, 2008 in Storage, Tips | 1 Comment »

Gabesvirtualworld posted Prevent your LUNs running out of space remind me about my VMFS LUNs space. Personally I don’t agreed about create a dummy vmdk on each LUN. Why? Arnim, you still have to wake up at 3am if received any calls. Just a joke!

Have a look here:
VMware ESX VMFS LUNs Report.
San Space

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How to add new volume in VM online (Windows)

Posted on November 3rd, 2008 in Data Center, Operating Systems, Storage, Tips, Virtualization | No Comments »

Your customer want you to add a new volume in one of the VM Windows server but can not affort down time? No worry, you can do that easily with ESX.

Below is step by step guide with screen captured from the VM (my test machine is running on Windows 2003 Enterprise):

Tip: It is best to do a snapshot before you start this task, incase anything goes wrong.

This is my test VM machine. It is having one disk at beginning.

1) This is my test VM machine. It is having one disk at beginning.

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How to add new volume in VM online (SLES)

Posted on November 3rd, 2008 in Operating Systems, Storage, Tips | No Comments »

Your customer want you to add a new volume in one of the VM SLES server but can not affort down time? No worry, you can do that easily with ESX.

Below is step by step guide with screen captured from the VM (my test machine is running on SLES10 SP2):

Tip: It is best to do a snapshot before you start this task, incase anything goes wrong.

This is my test VM machine. It is having one disk at beginning.

1) This is my test VM machine. It is having one disk at beginning.

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