Wow, there's been a lot of replies and certainly a number of things
have been cleared up, although some things have become even more
confusing.

It seems like my hardware will be more than powerful enough, even
taking under-clocking into account and what I thought was a paucity of
RAM. It seems the notion of three separate RAID 1 arrays are not
especially controversial although I will have to experiment with the
best way to partition them and create the relevant pools. I wonder if
I could cause these three arrays appear visible as one partition to
the client systems?

Talking of pools, I confess to finding this a truly confusing concept,
especially when looking at Dan's reply, which though extremely useful,
also gave me a headache as I tried to understand his disk provisioning
whilst relating that to my own concept. What you have to bear in mind
is that I come from a mindset used to NTFS and EXT based file systems,
so ZFS is truly alien to me.

When Dan explained his setup, he brought to my attention his 64GB root
disk. Aha! I think, this is something I was considering, but then I
come away thoroughly confused as I try to understand what his 52GB
rpool is used for (and indeed, what is rpool?), wonder at the 4GB
swap/dump (when using Linux I deliberately move the swap to a
mechanical drive to reduce wear on the SSD) and became utterly
perplexed as to how a 4GB ZIL qualifies as over-provisioned on an SSD
(I thought that ZIL was a log device and therefore written to a lot, I
had considered buying a Gigabyte i-RAM from the States to server this
role). Also Dan, do you use an L2ARC at all, could an SSD be
worthwhile for this?

I did find the zones a little confusing too, but as I plan on setting
up a virtual machine to practise on I'm sure I'll fathom things out
soon enough.

I think I can safely assume that my newer Windows clients will have no
trouble writing and reading to the ZFS shares and older Windows
clients may have to be presented with a Windows 2003 VM for that
purpose which will be fine enough as long as there is enough
horsepower to run it (I would assume there is). I do question how well
KVM would run on this hardware as I have been left with the impression
that under Illumos based systems KVM doesn't like AMD's virtualization
hardware?

And thanks to Volker for pointing out FreeNAS 8. I'm not ruling that
out but I'm given to understand that NAS4Free will run as an embedded
OS from a USB key, thus giving the 400GB drive over entirely to
storage. That said I'm not settled yet on what OS to use for the
secondary server and I will probably try a number of combinations.

Thank you all for your help thus far, as I mentioned in my previous
message, ZFS definitely seems like the way forward, it's just a matter
of learning what to do and finding a way of doing it that I am happy
with.


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