Newsgroups: fj.unix
Path: galaxy.trc.rwcp.or.jp!coconuts.jaist!wnoc-tyo-news!news.join.ad.jp!aoba!akiu!wnoc-snd-ss2!bass!wapiko!jf7pbw!yumyum!jf7wex
From: jf7wex@jf7wex.sdj.miyagi.prug.or.jp (Ryuji Suzuki)
Subject: Re: Blocking parameters of tapes
In-Reply-To: hiroshi@cgate.hipecs.hokudai.ac.jp's message of 31 Aug 1994 18:32:53 GMT
Message-ID: <JF7WEX.94Sep1113306@tumtum.sdj.miyagi.prug.or.jp>
Sender: usenet@jf7wex.sdj.miyagi.prug.or.jp
Nntp-Posting-Host: tumtum
Organization: Packet Radio User's Group(PRUG) Sendai, Miyagi.
References: <CvDI9y.KxK@gakushuin.ac.jp>
	<342icl$pll@nameserv.sys.hokudai.ac.jp>
Date: Thu, 1 Sep 1994 02:33:06 GMT
Lines: 67
Xref: galaxy.trc.rwcp.or.jp fj.unix:4809
X-originally-archived-at: http://galaxy.rwcp.or.jp/text/cgi-bin/newsarticle2?ng=fj.unix&nb=4809&hd=a
X-reformat-date: Mon, 18 Oct 2004 15:18:22 +0900
X-reformat-comment: Tabs were expanded into 4 column tabstops by the Galaxy's archiver. See http://katsu.watanabe.name/ancientfj/galaxy-format.html for more info.

In article <342icl$pll@nameserv.sys.hokudai.ac.jp> hiroshi@cgate.hipecs.hokudai.ac.jp (Hiroshi) writes:

   $B$3$3$G$O(B 1b=1block=512bytes $B$G$9!#(B $B$?$7$+!"(B
   sun $B$,(BSun-3$B$G:G=i:NMQ$7$F$$$?(B $B%F!<%WAuCV$N%G%P%$%9%I%i%$%P$O(B
   $B%O!<%I%&%'%"$@$+!"%=%U%H%&%'%"$@$+$G7h$^$C$F$$$?(B
   $B%G!<%?%P%C%U%!$N%5%$%:$,(B64kBytes $B$@$C$?$N$G$9(B.
   ($BB?J,$3$l$O%O!<%I%&%'%"$N%P%C%U%!%5%$%:$G$O$J$$!#(B)
   2$B%V%m%C%/Dx$O2?$+$GM>M5$,I,MW$@$C$?$N$G!"(B
   $BFI$a$k:GBg$N%F!<%W%V%m%C%/%5%$%:$,(B 126b = 63KB $B$@$C$?$N$G$9!#(B

QIC $B$N7o(B

DMA $B$,(B 64KB $B0J>e$r07$($J$$$H$$$&@)8B$+$i$N$b$N$HJ9$$$F$$$^$9!#(B
$B<B:];d$N(B Sun3 $B$G$OJ*M}%l%3!<%I$,(B 1MB $B$J$I(B 64KB $BD6$N(B 8mm $B$rFI$a$^$;$s!#(B
mtio(4)$B$rFI$s$@8B$j$G$O!"(B127 $B$K$7$J$$$G(B 126 $B$K$9$k$N$OM>M5$NLdBj$G(B
$B$O$J$/$F!"$-$j$,$$$$$H$$$&$/$i$$$N5$J,E*$JM}M3$@$H;W$$$^$9!#(B

   $B$A$J$_$K!"(BQIC $B%F!<%WAuCV<+BN$NJ*M}%V%m%C%/%5%$%:$O(B $B8GDj$G(B
   512bytes$B$G$9!#(B $B$h$C$F!"%F!<%W%V%m%C%/%5%$%:$H$7$F$O(B
   512bytes$B$NG$0UG\?t$,<h$l$^$9!#(B

$B%F!<%W%V%m%C%/$H$$$&$+!"(Bread/write $B%7%9%F%`%3!<%k$K0lEY$KEO$9Bg$-(B
$B$5$H$$$&$@$1$G$9$M!#FI$_=q$-;~$G$3$NBg$-$5$,0c$C$F$$$F$b!"APJ}$,(B
512bytes $B$NG\?t$G9T$J$o$l$F$$$k8B$jLdBj$J$$$h$&$G$9!#(B

   126b $B$K$9$k$H!"%F!<%W$NFI$_=q$-$,ES@Z$l$k3d9g$,8:$C$F!"(B
   $B%F!<%W$N1}I|F0:n$,8:>/$7(B, $BB.$/FI$_=q$-$,=PMh$k$h$&$K$J$k$[$+!"(B
   $B%F!<%W$N(BIRG$B$,8:$j%F!<%W$NMFNL$NL5BL$r8:$i$;$^$9!#(B

IRG $B$OJQ$i$J$$$H;W$$$^$9!#(B

xxx

8mm $B$N7o(B

   8mm $B$O!"J*M}%G%P%$%9$H$7$F$O(B, 1024bytes $B$N(B fixed block $B5-O?AuCV(B
   $B$J$N$G$9$,!"(B exabyte $B$NAuCV$H$7$F$O!"%*!<%W%s%j!<%k%F!<%WAuCV$N$h$&$K(B
   variable block size $B$N%F!<%WAuCV$N$h$&$K8+$($k$h$&$K$J$C$F$$$^$9!#(B

$B%$%s%?!<%U%'!<%9;o(B Jan 1993 $B$K$h$k$H!"%9%H%i%$%W$O(B 1KB $B$N%G!<%?$r(B8
$B8D3JG<$7$F$$$^$9!#$?$@!"<B:]%l%3!<%I4V$,J*M}E*$K$I$N$h$&$K5-O?(B
$B$5$l$k$+$K$D$$$F$O$o$+$j$^$;$s!#(BSun3 $B$N(B 8mm $B$N>l9g!"%l%3!<%I%5%$%:(B
$B$O(B 1 -- 65535bytes $B$N4V$GJQ$($i$l!"(Bread/write $B$G$b$C$HBg$-$/<h$k$H(B
$B<B:]$K$OJ,3d$7$F5-O?$5$l$k$h$&$G$9!#(B

   $B$G$b!"5-O?$N%5%$%:$O(B1024bytes $B$NG\?t$K$J$k$h$&$K$7$J$$$H(B
   $B%F!<%W$N8zN($d<B8z5-O?B.EY$,Mn$A$^$9!#(B

8mm $B$G$O(B 126 $B$G$J$/$F(B 112 $B$,$h$$$H$$$&OC(B($B??56$N$[$I$ODj$+$G$O$"$j(B
$B$^$;$s(B)$B$O!">e5-%9%H%i%$%W$,(B 7 $BK\$G(B 1 $B%l%3!<%I$H$$$&$3$H$K:,5r$r(B
$BCV$/$b$N$G$O$J$$$+$H;W$$$^$9$,!"%l%3!<%I4V$,<B:]$K$O$I$&$J$C$F(B
$B$$$k$N$+$I$J$?$+8fB8$8$"$j$^$;$s$+!#(B

$B$H$3$m$G!"(BNEWS $B$G$O(B($B>/$J$/$H$b(B 1700 $B$G$O(B) 64KB $B$N@)8B$O$J$$$h$&$G!"(B
1MB $B$d(B 2MB $B$N%l%3!<%I$N(B 8mm tape $B$NFI$_=q$-$,$G$-$^$9!#$D$^$j(B
126 $B$H$+(B 112 $B$H$$$&?tCM$O(B Sun $B>e(B($B>/$J$/$H$b(B Sun3 $B>e(B)$B$"$k$$$O(B
Sun $B$G;HMQ$9$k2DG=@-$r0U<1$7$?$b$N$G$"$k$H8@$($^$7$g$&!#(B

   $B$^$"!"$;$$$<$$(B QIC $B$G(B 1000$BDxEY(B $B$0$i$$$,NI$$$N$G$O$J$$$G$7$g$&$+!)(B
   $BAj<j$bFI$a$k$J$i$P(B...$B!#(B $BBg$-$$%V%m%C%/2=78?t$r<h$l$P$=$l$@$1(B
   $B%H%i%V%k$K$"$&2DG=@-$O9b$/$J$k$G$7$g$&!#(B

$BA0$K=q$$$?$h$&$K!"(BQIC $B$N>l9g$O(B 1000 $B$G$b2?$G$b$A$c$s$H=q$1$l$P(B
$BLdBj$O5/$i$J$$$G$7$g$&!#=>$C$F!"$3$NOC$O(B QIC $B$K4X$7$F$OBEEv$;$:!"(B
$B$`$7$m(B 8mm $B$K4X$7$F8@$($kOC$G$9!#(B
--
$B$9$:$-(B $B$j$e$&$8!J2>L>!K(B  $BCm!'2;@<$OJQ$($F$"$j$^$9!%(B
