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Date:      Sun, 07 May 2000 20:59:28 -0400
From:      "Louis A. Mamakos" <louie@TransSys.COM>
To:        Warner Losh <imp@village.org>
Cc:        Mike Smith <msmith@FreeBSD.ORG>, Greg Lehey <grog@lemis.com>, cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG
Subject:   Re: cvs commit: src/share/man/man4 sa.4 
Message-ID:  <200005080059.UAA90918@whizzo.transsys.com>
In-Reply-To: Your message of "Sun, 07 May 2000 18:23:45 MDT." <200005080023.SAA74329@harmony.village.org> 
References:  <200005080002.RAA12447@mass.cdrom.com>  <200005080023.SAA74329@harmony.village.org>

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> In message <200005080002.RAA12447@mass.cdrom.com> Mike Smith writes:
> : > In message <20000508085337.C61488@freebie.lemis.com> Greg Lehey writes:
> : > : FILES
> : > :      /dev/rmt*  Raw magnetic tape interface
> : > : 
> : > : There used to be a block interface for the 'mt' driver, so the drives
> : > : got names like /dev/mt8 and /dev/rmt8.  I think we need to get rid of
> : > : the 'r', like we did with disks.
> : > 
> : > No.  'r' means 'rewind' while 'nr' means no rewind.  The r's should
> : > stay.  I don't think that FreeBSD ever had a /dev/mt8, but I could be
> : > wrong about that.  I know I've always used /dev/rst0 or /dev/rsa0 for
> : > my backup needs.
> : 
> : That's what I thought too, but I think the historians have us outflanked 
> : on this one.  The only real issue now is POLA.
> 
> On the 4.2BSD vax we had back in school, it was /dev/rmt8 and
> /dev/nrmt8.  R stood for rewind, and has for a very long time.  The
> SunOS 3.5 machine behaved exactly the same way.
> 

Yeah, but /dev/mt8 would also rewind.  There were block tape devices on
the 4.2 system I used to use, probably more for completeness rather
than actual utility.  /dev/rmt? was the raw version of /dev/mt?

louie




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