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Date:      Tue, 19 Jul 2011 20:48:54 -0700
From:      Chuck Swiger <cswiger@mac.com>
To:        Jeremy Chadwick <freebsd@jdc.parodius.com>
Cc:        freebsd-stable@freebsd.org, perryh@pluto.rain.com, peterjeremy@acm.org
Subject:   Re: Status of support for 4KB disk sectors
Message-ID:  <84CC369B-4E70-414C-8C57-5FE772C7134F@mac.com>
In-Reply-To: <20110720031431.GA33758@icarus.home.lan>
References:  <CAN6yY1uaUqk2ifiNViJyMFJWf60a4DmCiVs3Z=--_TjtzseABQ@mail.gmail.com> <20110718234124.GA5626@icarus.home.lan> <CAN6yY1uaEwoEhEuoTNPqzywRaCPEvcLY-ddyFRUV00FcBDU1BA@mail.gmail.com> <E8F5CB22-21D5-4AF9-A690-1DB99D31F4CC@mac.com> <20110719211039.GA16085@server.vk2pj.dyndns.org> <02D367A5-CA74-4E8A-BE3E-F81485B287A7@mac.com> <4e26a250.iKKzhkOLoTB3sdOr%perryh@pluto.rain.com> <20110720031431.GA33758@icarus.home.lan>

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On Jul 19, 2011, at 8:14 PM, Jeremy Chadwick wrote:
> On Wed, Jul 20, 2011 at 02:39:28AM -0700, perryh@pluto.rain.com wrote:
>> IIRC, Plextor (and maybe some others) had a switch to select 512 or
>> 2048 as the default transfer size, precisely so that they could be
>> used as boot devices with systems that supported only 512.

Come to think of it, I do remember that switch, yes.

Do you happen to know whether this limitation was part of the Sun hardware,
or of SunOS?  CMU had a lot of Sun3 machines and NeXT clusters, so I ended
up mixing NeXT CD-ROM and the Canon? magneto-optical drives with Sun H/W,
and vice versa.

SunOS wasn't the only O/S which was run on a m68k Sun box.  ;-)

> I don't think Plextor was around back then; they used to be called TEXEL
> back in the early 90s.  The only Sun SCSI CD drives I saw were external
> and caddy-based, so I mentally correlate them with NEC.  Back then I
> wasn't looking at brands as much as I do today, though.

I'm pretty sure some folks had NEC caddy drives as well.

Regards,
-- 
-Chuck




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