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VMware Server

Posted on 2011-09-06
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Last Modified: 2012-05-12
I have a ESXI VMware environment, 3.5.0 and i have a virtual server that will not start. We lost power and upon starting up system I have a server that will not start. The progress bar reaches 95% then i receive the following error:
Cannot open the disk '/vmfs/volumes/.... or one snapshot kisks it depnds on. Reason: No such device.

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Question by:rbsanchez
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by:Andrew Hancock (VMware vExpert / EE MVE)
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1. Does the Virtual Machine have any snapshots? - Check Snapshot Manager

2. Is the datastore that the VM is stored on present?

3. Are any other VMs causing issues?

4. Is the datastore full?
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by:lucifer82
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Do you have few datastore?

Perhaps you had data on separate datastore that's currently not up?
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rbsanchez earned 0 total points
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No new datastores and all have enough room. I lost power last night again and this morning bringing up the servers that server worked. I know when opening a Console window it prompted me to change the UUID and i the instructions it stated that if i wasn't sure what to do that i should change the ID so I did. However in doing that it needed a reboot because when i lost power and i got everything up and going that server booted without issue.

I work for a school district so our technology needs aren't always on the front lines of "important things to buy." Kids come first so books and classroom needs are put in front of ours.

Thanks for your responses!

Ryan Sanchez
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by:lucifer82
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Hi rbsanchez,

just as the backup if you can I would at least make a copy of your VMs in case of another emergency.

I would use Veem Backup if you have enough budget!!

But good to hear that you solved the issue :)
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by:rbsanchez
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I'll look into that.

Thanks again,
 Ryan sanchez
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by:BDithelp
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Before you buy Veem.

If your running a Vcenter server you can use VMware Data Recovery and not cost you a thing even with the free Hypervisor to backup your full vm's. Super easy to setup but have to have at least 1 vCenter server, a few resources for the backup appliance and some disks to store the backup database of course. (suggested max is 500GB)

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by:lucifer82
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Also as addition for the Veem you can use the veem fast scp instead which is free if you can afford to shut down the VM once a month for backup.

So if you have maintenance plan for like windows update where you need down time to reboot it's worth looking at also ~ down side is it takes long time to copy unless the PC/Server that you're running the veem fast scp has gigabit connection to the datastore.

Also as a pointer if it's installed in the x64 system you need to do further configuration to get it working at max speed. Let me know if you need the info :D

Good Luck!!!
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by:Andrew Hancock (VMware vExpert / EE MVE)
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All you need to know about Backups

Checkout my Article

VMware ESX/ESXi Backup Guide
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Author Closing Comment

by:rbsanchez
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because issue seemed to resolve on it's own. Need a restart of the server.
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