Nope. It's a dynamic issue. The disks are as they were first formatted using the Windows 2000 CD a couple of years ago. They were not converted to dynamic, although I may try to convert them back to basic.
Here is a clear statement by MS that dynamic disks are not supported:
Obviously Vista HP could, if MS so willed, manage to recognize dynamic disks. The previously listed hack link shows that the rescue/conversion process would be relatively simple for a good coder to develop. (the app to effect the change is from Microsoft).
Microsoft has a right to choose what it's OS will support, but it would seem to me their duty to provide prospective customers with information. See their version comparison:
which I checked before making my decision.
I think this is a big deal. From knocking about for an answer I know that it is effecting quite a few users. The stat answer: Buy the upgrade, if you want your data.
Let's do the Math:
Windows Vista ultimate has an MSRP of $399, new.
Windows Home Premium is suggested to sell for $199.
The Ultimate upgrade is suggested to sell for $259.
This means if I find out that I cannot upgrade my system to Home Premium it will cost me $60 extra.
Microsoft and their preferred dealers make a profit off this.
This is the first time I have bought a computer off the rack. If I had as usual bought my components from a good local store or Tiger, I would have been warned of the issue.