[squid-users] Adding Another HardDisk

Hello all , i really appretiate your hard work on helping and guiding
users all over the word..:)

I have 2 questions:

If i want to add another hard-disk and to set it as a cache_dir for
squid to use, but without messing/rebuildings the other cache_dir's
that have cached objects
second question , i want to upgrade squid from 2.6 to 2.7 and let
squid 2.7 to use the cache_dir's that have cached objects without
rebuilding them

thank you

--