Am 29.01.2013 um 20:03 schrieb Tim Evans tkevans@tkevans.com:
Thanks to everyone for their replies. I suppose it's not possible in this forum to ask such a question and not get into religion. Kinda like the U.S. Congress.
No one has yet shown how a byte-for-byte, fully redundant, bootable disk(set) can be created and kept up to date that will allow immediate recovery from a catastrophic failure of the primary disk(set) with nothing more than a reboot.
FWIW, Solaris' problems are not technical. Rather, they're Oracle's licensing and support policies that have essentially fired all its small system customers.
I have to say, in my experience the LU-process works (reasonably) well for systems without zones. Once you have zones, it gets much, much more complicated.
It's a nice idea, though, and to me it makes sense (you don't want the system to be in a state where only half the patches are installed, however minuscule the effects of that may be).