Did you copy the ISO file to the DVD or burn the ISO? I see this most often when someone burns the ISO instead of copying it. You should be able to see the ISO file intact as the only file on the DVD if you look at it in Explorer.
That is interesting- I have always burned the ISO and not copied it. However, I tried what you suggested, just made a data CD with just the ISO file as the only file and now I get the error: The directory could not be located.
And yes, I had verified the MD5 checksum and it is correct.
Yeah, I would normally burn the image to the disk rather than have it as a single file on the DVD.
Having said that, I rarely bother wandering up to the servers unless something BAD happens - maybe try transferring it via SFTP in case there's a problem with the optical drive or something.
The other one I see occasionally is a badly named file - if you crack open the ISO with an appropriate tool (WinRAR, 7zip, any ISO package) there is a file in the root called 'ISOFILENAME'. Open that in a text editor, and ensure that your .iso file name is exactly the same as the name in this file.
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While trying to upgrade CUCM server from 184.108.40.20600-24 to 220.127.116.11000-1 on a Vmware setup with the 18.104.22.16800-24 system fully functional (receiving calls, voicemail working fine etc) .
When It tries to read the DVD it states: An error occurred while accessing the upgrade state file. Please verify the status of the local filesystem.
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