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Date: Mon, 15 Jul 2013 22:23:51 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: aurfalien <aurfalien@gmail.com>
Subject: Re: to gmirror or to ZFS
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On Mon, 15 Jul 2013, aurfalien wrote:

> ... thats the question :)
>
> At any rate, I'm building a rather large 100+TB NAS using ZFS.
>
> However for my OS, should I also ZFS or simply gmirror as I've a dedicated pair of 256GB SSD drives for it.  I didn't ask for SSD sys drives, this system just came with em.
>
> This is more of a best practices q.

ZFS has data integrity checking, gmirror has low RAM overhead.  gmirror 
is, at present, restricted to MBR partitioning due to metadata conflicts 
with GPT, so 2TB is the maximum size.

Best practices... depends on your use.  gmirror for the system leaves 
more RAM for ZFS.