FreeBSD & Software RAID

Gary Gatten Ggatten at
Tue May 26 19:17:20 UTC 2009

10-4, thanks!

-----Original Message-----
From: owner-freebsd-questions at
[mailto:owner-freebsd-questions at] On Behalf Of Kirk Strauser
Sent: Tuesday, May 26, 2009 2:00 PM
To: freebsd-questions at
Subject: Re: FreeBSD & Software RAID

On Tuesday 26 May 2009 01:44:51 pm Gary Gatten wrote:
> What about with PAE and/or other extension schemes?
> If it's just memory requirements, can I assume if I don't have a $hit
> load of storage and billions of files it will work "ok" with 4GB of
> I guess I'm just making sure there isn't some bug that only exists on
> the i386 architecture?

My understanding is that it's much more than "just" the memory
ZFS is thoroughly 64-bit and uses 64-bit math pervasively.  That means
have to emulate all those operations with 2 32-bit values, and on the 
register-starved x86 platform you end up with absolutely horrible
Furthermore, it's just not that well tested.  Sun designed ZFS for
systems and I think 32-bit support was pretty much an afterthought.
Kirk Strauser
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