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VMware: Windows 2008 disks are offline after upgrading hardware 4 to 7

Today I did some maintenance in the datacenter. I upgraded last month to vCenter 4.1 and the ESX hosts from 4.0 to 4.1. Today was planned to update some virtual hardware from 4 to 7 but after I upgraded and started some Windows 2008 SP2 VM’s I can’t connect mappings and receiving some errors from the loginscript. After some troubleshooting I saw that some local disks (.VMDK) are offline!


Goto Disk Management > Right click on the offline disk, select: Online 


Okay, the disk is online.. my data is back without any dataloss but my shares are gone. You only need to restart the VM again to resolve this issue.


Sander Daems is founder and author of this blog and working as a Lead (Sr.) Consultant by UNICA ICT Solutions. Sander has over 15 years experience in IT, primary focus: virtualization and modern worksplace.

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  1. Eric van der Meer
    September 21st, 2010  (Quote) at 07:32  (Quote) | #2

    Hi Sander,

    Experienced the same last week while migrating VM’s from 3.5 to vSphere 4.1.
    Thanks for sharing this info with us 😉

  2. September 22nd, 2010  (Quote) at 13:07  (Quote) | #3

    @Eric van der Meer

    Thanks for your reply Eric! 🙂

  3. Robert Wilson
    October 18th, 2010  (Quote) at 10:00  (Quote) | #4

    thanks for the post

  1. at | #1