My installation must be "very" ancient after this resilver.
pool: rpool
state: ONLINE
scan: resilvered 18.7G in 307445734561825847h23m with 0 errors on Mon
Feb 7 12:28:47 2011
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
c1t8d0s0 ONLINE 0 0 0
c1t9d0s0 ONLINE 0 0 0
Mark.