From owner-FreeBSD-users-jp@jp.freebsd.org  Wed Sep  4 00:26:35 1996
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Message-Id: <199609031526.AAA00284@adam.dsp.cl.nec.co.jp>
To: FreeBSD-users-jp@jp.freebsd.org
In-reply-to: Your message of Tue, 03 Sep 96 21:09:55 JST.
             <199609031205.VAA08643@sun.wind.co.jp> 
Date: Wed, 04 Sep 1996 00:26:24 +0900
From: Akihiro Hirano <hirano@dsp.cl.nec.co.jp>
Reply-To: FreeBSD-users-jp@jp.freebsd.org
X-Distribute: distribute [version 2.1 (Alpha) patchlevel=19]
X-Sequence: FreeBSD-users-jp 4121
Subject: [FreeBSD-users-jp 4121] Re: Can I use over 540MB-HDD? 
Errors-To: owner-FreeBSD-users-jp@jp.freebsd.org
Sender: owner-FreeBSD-users-jp@jp.freebsd.org

$BJ?Ln(B@NEC$B$G$9!D(B

> $B!!(BFAQ$B$+$b$7$l$^$;$s$,(B...

$B!!B?J,!"(BFAQ$B$J$N$G$9$,!D(B

> $B!!(BNEC$B$N(BPC-9801Ap$B$,<j$KF~$C$?$N$G!"(BFreeBSD(98)$B$rFbB"(BIDE-HDD$B$K%$%s%9%H!<%k(B
> $B!!$7$h$&$H9M$($F$$$k$N$G$9$,!"(BAp$B$N(BHDD-IF$B$G$"$k(BEnhanced$B$G$O$J$$(BIDE-IF$B$K(B
> $B!!(BEnhancedIDE-HDD$B$r@\B3$7$F!"$=$NA4MFNL$r(BFreeBSD$B$G;HMQ$9$k$3$H$O2DG=$G(B
> $B!!$7$g$&$+!#(B

$B!!<B$O!":G6a$N(B98$B$O?($C$F$$$J$$$N$G!"$3$A$i$O$o$+$j$^$;$s!#(B  m(._.)m

$B!t$*$^$($O$I$3$N<R0w$@!*$H$$$&FM$C9~$O!"5S2<!*(B  f(^.^;;;;

$B!!F(Hr%b!<%I$G!"$3$s$J$N=q$$$F$_$^$7$?!#$$$+$,!)(B
$B>\$7$$J}!"D{@5(B, $BJdB-$J$I!"$h$m$7$/!D(B

========================================================================
$B!{2?8N!"(BIDE$B%G%#%9%/$O:GBg(B504MB$B$J$N!)(B

$B!!(BIDE $B$N5,3J$G$O!"(B

        head      0-15 (!)
        sector    1-255
        cylinder  0-65535

$B$H$J$C$F$$$^$9!#(B1 sector = 512 bytes $B$J$N$G!":GBg(B130GB$B$NMFNL$K$J$j$^$9(B
($BCm(B: E-IDE$B$N4V0c$$$G$O$"$j$^$;$s(B!!)$B!#$=$l$KBP$7$F!"(BIBM/PC$B$N(BBIOS$B$O!"(B

        head      0-255
        sector    1-63 (!)
        cylinder  0-1023 (!)

$B$H$J$C$F$$$F!":GBg(B8GB$B$K$J$j$^$9(B($B$3$l$b!"(BE-IDE$B$N4V0c$$$G$O$"$j$^$;$s(B!!)$B!#(B
$B$G$O!"2?8N(B504MB$B$J$N$+!)>e5-$N$&$A!">.$5$$J}(B(!$B$rIU$1$?J}(B)$B$r<h$k$H!"(B

        head      0-15
        sector    1-63
        cylinder  0-1023

$B$G!"(B504MB$B$K$J$j$^$9!#(B   (-.-;;


$B!{(BIDE$B$N>e8B$O(B528MB$B$C$FJ9$$$?$s$G$9$1$I!)(B

$B!!%O!<%I%G%#%9%/20$5$s$O!"(B

        1MB = 1,000,000 bytes

$B$H?t$($^$9!#0lJ}!"7W;;5!%f!<%6$O!"(B

        1MB = 1,024 $B!_(B 1,024 bytes
            = 1,048,576 bytes

$B$H?t$($^$9!#$5$F!"(BIDE$B$N5,3J$H(BBIOS$B$N;EMM$NHD64$_$G7h$^$C$?!"(B16 heads,
63 sectors, 1024 cylinders$B$J%G%#%9%/$N%5%$%:$O!"(B

        528,482,304 bytes

$B$G$9!#(B528MB$B$G$9$M!#(B1024$B!_(B1024$B$G3d$k$H!"$A$g$&$I!"(B

        504MB

$B$K$J$j$^$9!#(B


$B!{(B540MB$B$N%G%#%9%/$C$F!)(B

$B!!$&!A$s!"Nc$($P!"(BWestern Digital$B$N(BAC2540$B$H$$$&%G%#%9%/$O!"(B16 heads,
63 sectors, 1048 cylinders$B$G$9!#$D$^$j!"(B 540,868,608 bytes $B$G$9!#<B$O(B
$B$3$N%G%#%9%/!"(B1024 cylinders$B$rD6$($F$$$^$9!#$A$g$C$HCm0U$,I,MW!#(B


$B!{(B540MB$B$N%G%#%9%/$r$D$J$$$@$N$K!"(B12MB$B$@$C$F8@$o$l$?$s$G$9$1$I!)(B

$B!!Nc$($P!"(B1048 cylinders $B$J%G%#%9%/$r!":GBg(B 1024 cylinders $B$J(BBIOS$B$G;H(B
$B$*$&$H$7$^$7$?!#>e8B$rD6$($F$$$^$9!#$G!"(B1024$B$G3d$C$?M>$j$O!"(B24
cylinders$B$G$9!#$3$NMFNL$O!"(B

	24 $B!_(B 16 $B!_(B 63 $B!_(B 512 = 12,386,304 bytes

$B$J$N$G!"Ls(B12MB$B$G$9$M!#$3$N?t;z$,=P$F$-$?$N$G$9!#(B


$B!{$(!+!A!"(B540MB$B$N$&$A(B12MB$B$7$+;H$($J$$$N$G$7$g$&$+!)(B   (g.g)

$B!!(BBIOS$B@_Dj$G!"(B1024 cylinders $B$rD6$($k?t;z$K$J$C$F$$$^$;$s$+!)$b$7$=$&(B
$B$J$i!"<jF0$G!"(B1024 cylinders $B$K$7$F$7$^$$$^$7$g$&!#>/$J$/$H$b!"(B528MB$B$O(B
$B;H$($^$9!#(B


$B!{(B800MB$B$N%G%#%9%/$r(B300MB$B$K$5$l$?26$O!"$I!A$9$j$cNI$$$s$@!)(B  (-.-#

$B!!$H$j$"$($:!"(BBIOS $B@_Dj$G(B 1024 cylinders = 504MB $B$K$7$F$*$$$F2<$5$$!#(B
FreeBSD$B$G$O!"%G%#%9%/A4BN$r;H$($^$9$+$i!D(B ($B>\:Y$O!"8e=R(B)


$B!{(BEnhanced IDE (E-IDE) $B$C$F2?!)(B

$B!!CN$j$^$;$s!#C/$+$*$;!A$F!#(B  *^.^*  f(^.^;;;;  m(._.)m

$B!!!V(B500MB$B$h$jBg$-$$%G%#%9%/$,;H$($k$s$@$h!W$H$$$&@bL@$O!"(BIDE$B$N>e8B$,(B
130GB$B$G$"$k$3$H$+$i9M$($F!"K\<A$G$O$J$5$=$&$G$9!#8D?ME*$K$O!"(BE-IDE$BHsBP(B
$B1~$J%^%7%s$K!"(B500MB$B$rD6$($k%G%#%9%/$r$D$J$$$G$$$^$9$,!"J?5$$G$9!#$I$&(B
$B$b!"(BATAPI CD-ROM$B$,$D$J$,$k$h$&$K$J$C$?$H$+!"E>AwJ}<0$,3HD%$5$l$?$H$+$,!"(B
E-IDE$B$NK\<A$N$h$&$G$9!#@5$7$$$G$7$g$&$+!)(B $B!d(B $B>\$7$$J}(B


$B!{$8$c$!!"!V(BE-IDE$BBP1~!W$H>N$7$F$k$N$O!"2?$J$N$5!)(B

$B!!07$($k%G%#%9%/$N%5%$%:$K4X$7$F$O!"(Bgeometry$BJQ49$K$h$C$F!"Bg$-$J%G%#%9(B
$B%/$r07$($k$h$&$K$7$F$$$^$9!#$3$l$r!V(BE-IDE$BBP1~!W$H>N$7$F$$$k5$G[$,$"$j(B
$B$^$9!#(BLBA (Logical Block Access ?) $B$H$$$&$N$O!"$3$N0lJ}<0$@$=$&$G$9!#(B
$B$d$C$F$$$k$3$H$O!"MpK=$K8@$&$H!"(B

        $B%7%j%s%@?t$r(B2$B$G3d$C$F!"Be$o$j$KJL$N?t;z$r(B2$BG\$9$k(B

$B$NN`$G$9!#(B


$B!{(BE-IDE$BHsBP1~$J%^%7%s$G!"(B1GB$B$N%G%#%9%/$r;H$($k$s$G$9$+!)(B

$B!!A4$F$N%^%7%s$G;H$($k$+$I$&$+$O$o$+$j$^$;$s$,!";H$($k$3$H$OB?$$$G$9!#(B

$B!!$?$@$7!"(BIBM/PC$B8_495!$N(BMS-DOS$B$G$O!"L5M}LpM}(B500MB$BD6$K$9$k%=%U%H$rF~$l(B
$B$k$+!"(BE-IDE$B%\!<%I$r;H$o$J$$8B$j$O!"%G%#%9%/A4It$r;H$&$3$H$O!"L5M}$G$9!#(B

$B!!(BFreeBSD$B$G$O!"%G%#%9%/A4BN$r;H$($^$9!#%+!<%M%k$rFI$_=P$9;~$7$+!"(BBIOS
$B$r;H$o$J$$$+$i$G$9!#$7$?$,$C$F!"(BBIOS$B$,%"%/%;%9$G$-$kHO0O$K(B/$B%Q!<%F%#%7%g(B
$B%s$r<}$a$F$*$1$P!"%V!<%H2DG=$G$9!#%V!<%H8e$O!"(BBIOS$B$r;H$o$:$K%G%#%9%/$K(B
$B%"%/%;%9$9$k$N$G!"(B1024 cylinders $B$,$I$&$7$?$H$$$&LdBj$O$"$j$^$;$s!#(B


$B!{$I!A$9$l$P!"Hs(BE-IDE$B%^%7%s$G(B504MB$BD6$N%G%#%9%/$r;H$($k$N!)(B

$B!!(BDOS$B$G(B504MB$B0J>e$r;H$&OC$G$O$J$$$N$G!"0-$7$+$i$:!#(B

$B!!$^$:!"(BBIOS$B$OqY$7$F!"(B1024 cylinders = 504MB$B$H;W$o$;$F$*$-$^$7$g$&!#%G%#(B
$B%9%/A4BN$r(BFreeBSD$B$G;H$&;~$O!"$3$l0J>e2?$b9M$($:$K!"%$%s%9%H!<%k$G$-$^(B
$B$9!#(B

$B!!(BDOS$B$d(BWindows$B$H6&B8$5$;$k;~$O!"(BDOS$B$d(BWindows$B$r(B1024 cylinders$BL$K~$NNN0h(B
$B$K2!$79~$s$G$d$j$^$9!#(BFreeBSD$B$N(B / $B%Q!<%F%#%7%g%s$b(B 1024 cylinders$B0JFb(B
$B$K<}$a$kI,MW$,$"$k$3$H$KCm0U$7$F2<$5$$!#Nc$($P!"(BDOS/Windows$B$K(B450MB$B<h$l(B
$B$P!"(B/ $B$K(B 54MB $B$^$G3d$jEv$F$i$l$^$9!#(B

$B!!$5$F!"(BFreeBSD$B$K%$%s%9%H!<%k$G$9$,!"FCJL$J:Y9)$OITMW$G$9!#M#0l!"(B/ $B%Q!<(B
$B%F%#%7%g%s$r(B1024 cylinders$B0JFb$K<}$a$k!"$=$l$@$1$KCm0U$9$l$P(BOK$B$G$9!#%$(B
$B%s%9%H!<%i$+$i$O!"%G%#%9%/A4BN$,8+$($F$$$k$O$:$G$9!#9%$-$J$h$&$K;H$($^$9!#(B


$B!{(BE-IDE$BBP1~$J%^%7%s$G!"(BDOS/Windows$B$H(BFreeBSD$B$r6&B8$5$;$k$K$O!)(B

$B!!$$$m$$$m!"J}K!$,$"$j$^$9!#(BDOS/Windws$B$K$O(B500MB$BL$K~$7$+3d$jEv$F$J$$$N(B
$B$J$i!"(BBIOS$B@_Dj$G(BE-IDE, LBA, Large-Drive$B$NN`$rA4$F(BOFF$B$K$7$F!"Hs(BE-IDE$B07(B
$B$$$K$7$F$7$^$&J}K!$b$"$j$^$9!#(B

$B!!(BDOS/Windows$BEy$G!"(B504MB$B0J>e$r;H$&>l9g$K$O!"(BLBA$B$KMj$k$3$H$K$J$j$^$9!#(B
BIOS$B$,JQ49$7$?%Q%i%a!<%?(B($B%7%j%s%@?t!"%X%C%I?tEy(B)$B$HF1$8%Q%i%a!<%?$r!"(B
FreeBSD$B$G$b;XDj$9$l$PF0$/$H;W$$$^$9!#<+J,$G$O3NG'$7$F$$$J$$$N$G!"<+?.(B
$B$O$"$j$^$;$s$,!D@5$7$$$G$9$+!)(B   $B!d(B  $B>\$7$$?M(B


$B!{(BPC-98XX$B$@$H!)(B

$B!!$4$a$s$J$5$$!#7P83$,$J$$$N$G!"$o$+$j$^$;$s!D(B   m(._.)m
$BC/$+!"65$($F!D(B
========================================================================
----
$BF|K\EE5$(B($B3t(B)$B>pJs%a%G%#%"8&5f=j!!J?Ln989((B
E-mail : hirano@dsp.CL.nec.co.jp
