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From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com>
Message-Id: <199506070018.RAA00717@gndrsh.aac.dev.com>
Subject: Re: large filesystems/multiple disks [RAID]
To: jgreco@brasil.moneng.mei.com (Joe Greco)
Date: Tue, 6 Jun 1995 17:18:03 -0700 (PDT)
Cc: freebsd-hackers@FreeBSD.org
In-Reply-To: <199506062056.PAA09582@brasil.moneng.mei.com> from "Joe Greco" at Jun 6, 95 03:56:15 pm
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> 
> Hi Rod,
> 
> > > > I have read the code in stripe.tar, it should be a day or twos work
> > > > to get it up and running under FreeBSD.
> > > 
> > > Did you ever make any progress on this?  If not, I will (try to) look at
> > > it, but I'd prefer that somebody that knows what the heck they're doing down
> > > within the device driver code putz with it..  :-)
> > 
> > Yes, I played with that code (infact I have a kernel with /dev/ilv in
> > it).  I never made it work completly.  Then I remeber the sys/dev/cd.c
> > driver that came with 4.4 Lite and went and looked at it.  I also have
> > that working (renamed to concat.c to elimanate the conflict) partially,
> > enough to say that I took 2 4MB/sec drives and interleaved them and
> > got a 5.2MB/sec transfer rate for reads (I can't write due to bugs)
> > *with out* spindle sync. 
> > [...]
> > > Having recently seen Solaris' Online: DiskSuite, which suffers from fairly
> > > significant performance degradations, I'm curious to see what a real
> > > operating system can do.  ;-)
> > 
> > It will be at least another week, but you'll now I have made serious
> > progress when you see a cvs commit message for the import of
> > sys/dev/concat.
> 
> Any progress on this?  I have not seen anything recently, or any signs of
> ilv or concat that I can determine in 2.0.5A...?  Or am I just blind?  :-)

You can forget any thing from me right now except for release work and
trying to get moved... sorry, it will be mid July before this code sees
the light of day :-(.

-- 
Rod Grimes                                      rgrimes@gndrsh.aac.dev.com
Accurate Automation Company                   Custom computers for FreeBSD