OKay, I had to think about this before posting. This question may be silly
or not and I am willing to take the risk of looking foolish. It never
stopped me before :-)

Given : a machine with dual ( at least ) internal disks, identical in
model and firmware, which may or may not be on the same controller.

Is there a way to setup the install process such that my default ZFS
mirrored rpool and filesystems therein also have compression AND possibly
copies=2?

I know that GRUB probably will not grok compressed ZFS. That means this
could be a silly question. Therefore the bootable bits needed to get to
the basic kernel with a few needed modules will be on uncompressed ZFS but
the rest of the system, all of it, can be on compressed ZFS. At least in
theory.

Can the installer script-foo be modified such that the initial zfs create
has -o compression=on and -o copies=N for some N>1 ?

-- 
Dennis

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