Can v240 disks be moved to v440 and have a chance of working?

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http://www.unix.com – We have a v240 running Solaris 10, and an application that I don't want to go through the pain of reinstalling on a new system right now. Can I just move those disks to a v440 for an easy upgrade? At first I thought the idea was laughable, but then I started thinking that they are both Ultra Sparc III, and it might be possible. Any thoughts (or even laughs) are appreciated. Thanks...Lyle (HowTos)