Date: Wed, 20 Jul 2011 02:39:28 -0700 From: perryh@pluto.rain.com To: cswiger@mac.com Cc: freebsd-stable@freebsd.org, peterjeremy@acm.org Subject: Re: Status of support for 4KB disk sectors Message-ID: <4e26a250.iKKzhkOLoTB3sdOr%perryh@pluto.rain.com> In-Reply-To: <02D367A5-CA74-4E8A-BE3E-F81485B287A7@mac.com> 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>
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Chuck Swiger <cswiger@mac.com> wrote: > On Jul 19, 2011, at 2:10 PM, Peter Jeremy wrote: > > On 2011-Jul-19 10:54:38 -0700, Chuck Swiger <cswiger@mac.com> wrote: > >> Unix operating systems like SunOS 3 and NEXTSTEP would happily > >> run with a DEV_BSIZE of 1024 or larger-- they'd boot fine off > >> of optical media using 2048-byte sectors, > > > > Actually, Sun used customised CD-ROM drives that faked 512-byte > > sectors to work around their lack of support for anything else. > > Hmm-- my brain could be fuzzy about things twenty-plus years > ago. But I remember booting a Sun3_35 or _60 from a non-Sun > or Sun OEM'ed SCSI CD-ROM drive, probably a Plextor? 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.home | help
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