Uncompress a VMWARE OVA and modify its VM version

Introduction :

This post shows how to adapt a VMWARE OVA for a Virtual Machine with VM8 format to a VM7 format compatible with ESXi4.

When you try to open an OVA with the format vmx-08 on an ESXi 4.1 you get the following error :

 “The OVF package requires unsupported hardware
Details: Line 25: Unsupported hardware family ‘vmx-08’.”


Uncompresse OVA Archive :

First off all uncompress the OVA archive (with a zip extractor like 7-ZIP)

You will get a directory with 3 files on it like this : _ CentOS6_64b_PostGre_Designed.mf _ CentOS6_64b_PostGre_Designed.ovf

Modify the OVF file :

Open the *.ovf file

Change the following line :


By this one :


Modify the *.mf file and calculate the SHA1 hash of the modified OVF file :
Open the *.mf file which contains the SHA1 hash of *.ovf file. So you need to replace the value specified by the new SHA1 hash of .ovf file.

SHA1( _ Kurmi_64b_PostGre_Designed.ovf)= 48432f9cb8b0bfa97098006abb390805449303be
SHA1( ffa3500bc379a2e040badce315d6b3b06876d5a9

To calculate this hash you can use a tool like FCIV from microsoft. You can download it there : http://support.microsoft.com/kb/841290

>D:\FCIV\fciv.exe -sha1 " _ Centos6_64b_PostGre_Designed.ovf"
// File Checksum Integrity Verifier version 2.05.
a5dfa395e40861199582e8a66b1c36f58b27b7bf _ Centos6_64b_postgre_designed.ovf

So, put the new hash in the *.mf file and save it

SHA1( _ Kurmi_64b_PostGre_Designed.ovf)= a5dfa395e40861199582e8a66b1c36f58b27b7bf
SHA1( ffa3500bc379a2e040badce315d6b3b06876d5a9

Deploy the new OVF :

Now, you can deploy directly the new OVF file on ESXi 4.1.
On VSPHERE select :

File > Deploy OVF Template
Select your OVF file :

The following WARNINGS are raised but you can move forward.


So now you can deploy and start your VM.


One Response to Uncompress a VMWARE OVA and modify its VM version

  1. Aaron says:

    Thank you!

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