The rx2600 has an ia64 processor codenamed Madison, branded as Itanium 2. It has 3MB cache and runs at 1.3GHz. My box has two. It took me seven hours to install HP-UX 11iv3 (11.31) Data Center OE (DCOE) which combines the HP-UX 11i operating system with virtualization and high availability. vPar & APA (auto-port aggregation) packages built right in. I don't want to create a virtual HP/UX instance within my HP/UX box though, rather linux, though I do not know if this is yet possible. Ubuntu & Gentoo both have ia64 (Itanium) install iso's.
The problem I'm having is that I chose 'everything' as an install selection, which literally installed everything, and everything is running. At least that's my assumption why everything responds so sluggishly despite the machine not being under any load right now. Also, SAM has been obsoleted in 11.31 - no more SAM. It runs something now called SMH, SAM's replacement. I'm sure its a fine tool if you're into GUI's, but I may never know since it takes so long to launch on this box. I may soon re-install DCOE with a much more critical eye to installed apps, in hopes of getting the box quick again.
Wish me luck.