[gentoo-user] Mothballing a ~arch gentoo system?

[Marcus Wanner]

When an old (circa 2001) desktop came out of retirement a few months 
ago, I shuffled across Linuxes trying to find something that worked 
well, and finally hit on gentoo. I eventually switched to ~x86 because I 
was tired of using versions of apps from 6 months ago... Too make a long 
story short, I have a new computer now and that one is going back into 
retirement. I may want to use it more in future and would like to know 
how I would go about "mothballing" it so that if it ever needs to be 
used again, bringing it up to date will be as smooth and painless as 
possible. If I need to resurrect it, it will probably be at least a year 
from now. What would you recommend?

Marcus