On Thursday, May 12, 2011 06:23:52 AM Christopher Chan wrote: > 6.04->10.04? Nah, you are supposed to jump to 8.04 and then to 10.04. I did 6.06 -> 8.04 -> 10.04, and it broke. Badly. > > Upgrades are difficult problems to solve, and at the moment I don't know of any distribution (that claims upgradability) that gets it completely right for all the cases I've tried. > > Not even Debian? The one box I ran Debian on was somewhat unusual, and I lost SMP capability on the box upgrading the one time I did. The box is a DEC AlphaServer 2100 (Sable), and Sable SMP is hard to get these days; the last Debian kernel I know of that supported it was a 2.2 series kernel...... Looking more like I'm going to do at least one, and possibly more, SPARCs on Debian, I'll get a little more experience with it then. I'd rather do CentOS, and be consistent across servers in terms of administration.... > On the OpenSolaris/OpenIndiana side of things, I have not had problems. > And you get a complete rollback option too as a bonus. Rollbacks would be good. The smoothest upgrades of any I've ever done have been on EMC Clariion gear and its FLARE operating environment. But that's controlled hardware, and tightly controlled software, not a general purpose OS, so not directly comparable.