[geeks] ZFS raidz and set copies

[Jonathan Groll]

ZFS has the ability to set the number of copies saved of each file for
very important directories, e.g. "zfs set copies=3". Now I know that
some of you guys have been playing around with ZFS, and so I was
wondering if there was any point to increasing the number of copies if
you already have a raidz pool (which should already be redundant)?

Also, like Shannon Hendrix I have a mixed collection of oldish drives
that I plan to use for ZFS, how well does raidz handle unequal drive size?

Thanks,
Jonathan.

P.S. if at all relevant this is ZFS on freebsd 7.0-release (sparc64)