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<H2><A NAME="s3">3. $B%I%i%$%V$N5;=Q(B</A></H2>
<P>
<!--
disk!technologies
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IBM PC $B$N%I%i%$%V$N5;=Q$K4X$7$F$O!"$3$NJ8=q$h$j$b$:$C$H=<<B$7$?5DO@$,(B
<A HREF="http://thef-nym.sci.kun.nl/~pieterh/storage.html">The Enhanced IDE/Fast-ATA FAQ</A>
$B$N(B Web $B%Z!<%8$K$"$j$^$9!#(B
$B$3$l$O(B Usenet $B%K%e!<%9$K$bDj4|E*$K%]%9%H$5$l$F$$$^$9!#(B
$B$^$?(B ATA $B$H(B ATAPI $B$N>pJs$d%=%U%H%&%'%"$r=8$a$?%5%$%H(B
<A HREF="http://ata-atapi.com">http://ata-atapi.com</A>
$B$b$"$j$^$9!#(B
<P>$B$3$3$G$O%;%C%H%"%C%W$N:]$KI,MW$H$J$k%I%i%$%V4XO"5;=Q$NCN<1$r(B
$B$+$$$D$^$s$G<($7$^$9!#(B
<P>
<H2><A NAME="ss3.1">3.1 $B%I%i%$%V(B</A>
</H2>
<P>
<!--
disk!drives
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$B%I%i%$%V$H$O%G!<%?$rJ];}$9$kJ*M}%G%P%$%9$N$3$H$G$9!#(B
$B$H$F$b$?$/$5$s$N<oN`$,$"$j!"(B
$B%*%Z%l!<%F%#%s%0%7%9%F%`$+$i$O$I$l$b;w$?$h$&$K8+$($^$9$,!"(B
$BCf?H$OHs>o$K0[$J$C$F$$$^$9!#(B
$B$=$l$>$l$,$I$N$h$&$K5!G=$7$F$$$k$+$rCN$k$3$H$O!"(B
$B8e$G9T$J$&%G%#%9%/G[CV$N:]$KBg$-$J=u$1$H$J$k$G$7$g$&!#(B
$B%U%m%C%T!<%I%i%$%V$K4X$7$F$O:#$N$H$3$mL5;k$7$F$$$^$9$,!"(B
$B$b$7MWK>$,B?$1$l$P>-MhDI2C$9$k$+$b$7$l$^$;$s!#(B
<P>
<H2><A NAME="ss3.2">3.2 $B%8%*%a%H%j(B</A>
</H2>
<P>
<!--
disk!geometry
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$B%G%#%9%/%I%i%$%V$O(B 1$B!A?tKg$N1_HD(B (platter) $B$+$i$J$C$F$*$j!"(B
$B$3$3$K%G!<%?$,FI$_=q$-$5$l$^$9!#(B
$BFI$_=q$-$r9T$J$&$N$O0\F0<0$N%X%C%I$K8GDj$5$l$?%;%s%5!<$G$9!#(B
$B$=$l$>$l$N1_HD$KBP1~$9$k!V%X%C%I!W$O$R$H$D$N%"!<%`$K8GDj$5$l$F$$$F!"(B
$B$9$Y$F$N%X%C%I$,0l=o$KF0$-$^$9!#(B
$B=>$C$F%G!<%?E>Aw$OA4It$N1_HD$NI=LL$+$iF1;~$K$5$l$k$3$H$K$J$j!"(B
$B$3$l$,%H%i%C%/$N!V%7%j%s%@!W$H$J$j$^$9!#(B
$B$^$?%I%i%$%V$O!V%;%/%?!W$K$h$C$F$bJ,3d$5$l$F$$$^$9!#(B
$B%;%/%?$OB??t$N%G!<%?%U%#!<%k%I$+$i9=@.$5$l$F$$$^$9!#(B
<P>$B$3$l$i%7%j%s%@(B (Cylinder)$B!"%X%C%I(B (Head)$B!"%;%/%?(B (Sector) $B$N?t(B ($B0J2<(B
CHS $B$H8F$S$^$9(B) $B$N$3$H$r$^$H$a$F!V%8%*%a%H%j!W$H8@$$$^$9!#(B
$B%I%i%$%V$O$3$N%8%*%a%H%j$K$h$C$FJ,N`$5$l$^$9!#(B
<P>$B?'!9$JM}M3$+$i!":#$G$O0J2<$N$h$&$J$b$N$N4V$G(B
CHS $B%G!<%?$NJQ49$,$5$l$k$h$&$K$J$C$F$$$^$9!#(B
<UL>
<LI>$B%I%i%$%V$=$N$b$N$NJ*M}(B CHS$B!#(B</LI>
<LI>$B%I%i%$%V$,(B BIOS $B$d(B OS $B$KEA$($kO@M}(B CHS</LI>
<LI>OS $B$K$h$C$FMQ$$$i$l$kO@M}(B CHS</LI>
</UL>
<P>$B$3$N$h$&$K$J$C$F$7$^$C$F$$$k$N$O!"(B
$B$D$^$k$H$3$m%7%9%F%`$N=PMh$,0-$$$?$a$G!"(B
$BMM!9$J:.Mp$N860x$H$J$C$F$$$^$9!#$b$C$HCN$j$?$$J}$K$O(B
<EM>Large Disk mini-HOWTO</EM> $B$r?dA&$7$F$*$-$^$9!#(B
<P>$BLuCm(B:
<A HREF="http://www.linux.or.jp/JF/JFdocs/Large-Disk-HOWTO.html">Large Disk HOWTO $B$NF|K\8lLu(B</A>
$B$O(B JF $B$K$"$j$^$9!#(B
<P>
<H2><A NAME="ss3.3">3.3 $B%a%G%#%"(B</A>
</H2>
<P>
<!--
disk!media
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$B%a%G%#%"$N5;=Q$O!"(B
$B%G%#%9%/$NFI$_=q$-B.EY!&%7!<%/;~4V!&5-21MFNL!&(B
$B=q$-9~$_2DG=$+%j!<%I%*%s%j!<$H$J$k$+$J$I$N(B
$B=EMW$JMWAG$r7hDj$E$1$^$9!#(B
<P>
<H3><A NAME="magnetic-drives"></A> $B<'5$%G%#%9%/(B</H3>
<P>
<!--
disk!media!magnetic
-->
$BFI$_=q$-2DG=$JBgMFNL5-21G^BN$H$7$FBeI=E*$J$b$N$G$9!#(B
$B%3%s%T%e!<%?J,Ln$NDLNc$K$b$l$:!"(B
$BMM!9$JFC@-!"5!G=$N$b$N$,MpN)$7$F$$$^$9!#(B
$BFI$_=q$-2DG=$JDL>o$N%a%G%#%"$NCf$G$O:GB.$N$b$N$H8@$C$FNI$$$G$7$g$&!#(B
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$B<'5$G^BN$NLL@Q$rM-8z$KMxMQ$G$-$k$h$&$K!"(B
$BJ*M}%;%/%?$N@~L)EY$O%G%#%9%/$NFbB&$H30B&$G0[$J$C$F$$$^$9!#(B
$BD9$5Ev$?$j$N%S%C%H?t$,$@$$$?$$0lDj$K$J$k$h$&$K!"(B
$B30B&$N%H%i%C%/$G$NO@M}%;%/%?$N?t$rA}$d$7$F$"$k$N$G$9!#(B
<P>$B2sE>3QB.EY$ODL>o(B 4500 $B$+(B 5400 RPM
(rounds per minute: $B0lJ,4V$"$?$j$N2sE>?t(B) $B$G$9!#(B
7200 RPM $B$N$b$N$b=P$^$o$C$F$$$^$9!#(B
$B$4$/:G6a$G$O(B 10000 RPM $B$N@=IJ$b;T>l$K=P$O$8$a$F$$$k$h$&$G$9!#(B
$B%7!<%/;~4V$O(B 10 ms $BDxEY$G$9!#(B
$BE>AwB.EY$O%b%G%k$K$h$C$F$@$$$V0c$$$,$"$j$^$9$,!"(B
$BDL>o$*$h$=(B 4$B!A(B40 MB/s $BDxEY$G$9!#(B
$B9b$$@-G=$r;}$C$?%I%i%$%V$G$O!"(B
$BEENO$,M>7W$KI,MW$K$J$k$3$H$bK:$l$J$$$G$/$@$5$$!#(B
$B$3$NEENO$O:G=*E*$K$OG.$KE>2=$7$^$9!#$3$NE@$K$D$$$F$O(B
<A HREF="Multi-Disk-HOWTO-20.html#power-heating">$BEENO$HH/G.(B</A>
$B$N@a$r;2>H$7$F$/$@$5$$!#(B
<P>$B%G!<%?$NE>Aw$K$O$$$/$D$+$NCJ3,$,$"$j!"(B
$B$=$l$>$l0[$J$C$?C10L$,MQ$$$i$l$k$3$H$KCm0U$7$F$/$@$5$$!#(B
$B$^$:<'5$1_HD$+$i%I%i%$%VFb$N%-%c%C%7%e$^$G$NE>Aw$,$"$j!"(B
$B$3$l$ODL>o(B Mbits/s $B$GI=$5$l$^$9!#(B
$B0lHLE*$K$O(B 50$B!A(B250 Mbits/s $BDxEY$N$b$N$,B?$$$h$&$G$9!#(B
$B<!$K%I%i%$%VFb$KAH$_9~$^$l$?%-%c%C%7%e$+$i%[%9%H%"%@%W%?$^$G$NE>Aw$,$"$j$^$9!#(B
$B$3$l$O(B MB/s $B$G5-=R$5$l!"(B
3$B!A(B40 MB/s $BDxEY$G$"$k$3$H$,B?$$$h$&$G$9!#(B
$B$?$@$7$3$l$O%-%c%C%7%e$NCf$K%G!<%?$,B8:_$7$F$$$k>l9g$N(B
$B:G9bB.EY$rI=$7$?$b$N$G$"$j!"<B:]$NE>AwB.EY$O$b$C$H$:$C$HDc$/$J$j$^$9!#(B
<P>
<P>
<H3>$B8w%G%#%9%/(B</H3>
<P>
<!--
disk!media!optical
-->
$B8w$rMxMQ$7$?FI$_=q$-2DG=$J%G%#%9%/$bB8:_$7$F$$$^$9$,!"(B
$BCY$$$N$G$=$l$[$I0lHLE*$G$O$"$j$^$;$s!#(B
NeXT $B$N%^%7%s$GMQ$$$i$l$F$$$k$h$&$G$9$,!"(B
$BCY$$$;$$$GNI$/J86g$N%?%M$K$J$C$F$$$^$9!#(B
$B%G!<%?$NJ]B8$K$OAjJQ2=$rMQ$$$^$9$,!"(B
$B$3$N$H$-$NG.FC@-$,=q$-9~$_B.EY$r7h$a$F$$$^$9!#(B
$B$?$H$(6/NO$J%l!<%6$rMQ$$$?$H$7$F$b!"(B
$BAjJQ2=$r0z$-5/$3$929EYJQ2=$K$+$+$k;~4V$O(B
$B<'5$%I%i%$%V$N<'5$8z2L$N;~4V$h$j$bCY$$$N$G$9!#(B
<P>$B:#F|$G$OB?$/$N?M!9$,(B CD-ROM $B$rMxMQ$9$k$h$&$K$J$C$F$$$^$9!#(B
$BL>A0$+$i$o$+$k$h$&$K$3$l$O%j!<%I%*%s%j!<$G$9!#(B
$BMFNL$O$*$h$=(B 650 MB$B!"E>AwB.EY$O%I%i%$%V$K$h$j$^$9$,(B
1.5 MB/s $B0J>e$N$b$N$b$"$k$h$&$G$9!#(B
$B%G!<%?$O124,>u$N0lK\$N%H%i%C%/$KJ]B8$5$l$^$9!#(B
$B$7$?$,$C$F%8%*%a%H%j$O0UL#$r;}$A$^$;$s!#(B
$B%G!<%?L)EY$O%H%i%C%/>e$G0lDj$G!"(B
$B%I%i%$%V$O@~B.EY$,0lDj$K$J$k$h$&$K2sE>$7$^$9!#(B
$B%H%i%C%/$,124,$G$"$k$?$a$K%7!<%/F0:n$bDcB.$G!"(B
$BBgBN(B 100 $B%_%jICDxEY$G$9!#(B
$B:G6a$G$O@~B.EY0lDjF0:n$H3QB.EY0lDjF0:n$rAH$_9g$o$;$F(B
$B@-G=$r:GE,2=$5$;$k$h$&$K$b$J$C$F$-$F$$$^$9!#(B
$B$3$l$K$h$j%7!<%/;~$N2sE>B.EY9g$o$;$NF0:n$,7Z8:$5$l$k$?$a!"(B
$B%"%/%;%9;~4V$bC;=L$G$-$^$9!#(B
<P>$B?77?$N8w%G%#%9%/(B (DVD) $B$b;Q$r8=$7$D$D$"$j$^$9!#(B
$B$3$l$O0lKg$N%G%#%9%/$K(B 18 GB $B$NMFNL$r5-O?$G$-$^$9!#(B
<P>
<H3>$B8GBNAG;R%G%#%9%/(B</H3>
<P>
<!--
disk!media!solid state
-->
$BHf3SE*:G6aMxMQ$5$l$k$h$&$K$J$C$?5;=Q$G!"(B
$B%]!<%?%V%k%3%s%T%e!<%?$dAH$_9~$_%7%9%F%`$G$O%]%T%e%i!<$K$J$C$F$-$F$$$^$9!#(B
$BF0:nItJ,$,L5$$$N$G%"%/%;%9$bE>Aw$bHs>o$K9bB.$G$9!#(B
$B%U%i%C%7%e(B RAM $B$,:G$bNI$/MQ$$$i$l$F$$$^$9$,!"B>$N7A<0$b$"$j$^$9!#(B
$B?tG/A0$K$O<'5$%P%V%k%a%b%j$,>|K>$5$l$?$3$H$b$"$j$^$7$?$,!"(B
$B9b2A$J$N$G0lHLE*$K$O$J$j$^$;$s$G$7$?!#(B
<P>$B$H$3$m$G(B RAM $B%G%#%9%/$rMQ$$$k$N$O0lHL$KNI$/$J$$$H$5$l$F$$$^$9!#(B
RAM $B%G%#%9%/$K$9$k%a%b%j$,$"$k$J$i!"$=$NJ,$r(B OS $B$K4IM}$5$;!"(B
$B%P%C%U%!$d%-%c%C%7%e!"%W%m%0%i%`NN0h!"(B
$B%G!<%?NN0h$J$I$H$7$FMxMQ$9$kJ}$,M-8z$@$+$i$G$9!#(B
RAM $B%G%#%9%/$,M-8z$J$N$OHs>o$KFC<l$J>l9g!"(B
$BNc$($P%?%$%`%^!<%8%s$N87$7$$(B
$B%j%"%k%?%$%`%7%9%F%`$J$I$@$1$G$"$k$H9M$($F$/$@$5$$!#(B
<P>$B:#F|$G$O?t(B 10 MB $B%5%$%:$N%U%i%C%7%e(B RAM $B$,MxMQ$G$-$k$h$&$K$J$j$^$7$?$N$G!"(B
$B$3$l$r9bB.$J0l;~5-21NN0h$H$7$FMxMQ$7$?$/$J$k$+$b$7$l$^$;$s!#(B
$B$7$+$7$3$l$K$OBg$-$JLdBj$,$"$j$^$9!#%U%i%C%7%e(B RAM $B$K$O<wL?$,$"$C$F!"(B
$B:F=q$-9~$_$r9T$($k2s?t$K@)8B$,$"$k$N$G$9!#(B
$B$7$?$,$C$F$3$N$h$&$J%G%P%$%9$r%9%o%C%W$d(B <CODE>/tmp</CODE>,
<CODE>/var/tmp</CODE> $B$J$I$K$"$F$,$&$H!"(B
$B$3$l$i$N<wL?$rHs>o$K=L$a$k$3$H$K$J$C$F$7$^$$$^$9!#(B
$B$=$N$+$o$j$K!"%U%i%C%7%e(B RAM $B$r(B
$B!VIQHK$KFI$_9~$^$l$k$,$a$C$?$K=q$-9~$^$l$J$$%G%#%l%/%H%j!W$KMQ$$$k$H!"(B
$BHs>o$K@-G=$,8~>e$9$k$G$7$g$&!#(B
<P>$B%U%i%C%7%e(B RAM $B$N<wL?$r$h$jD9$/$7$?$$>l9g$O!"(B
$B@lMQ$N%I%i%$%P$rMQ$$$F(B RAM $B$NA4NN0h$r6QEy$KMQ$$$?$j!"(B
$B%V%m%C%/>C5n$N2s?t$r8:$i$7$?$j$9$kI,MW$,$"$k$G$7$g$&!#(B
<P>$B$3$l$O!V%G%#%l%/%H%j$4$H$K3d$jEv$F$k%G%P%$%9$rJQ$($k!W(B
$B$3$H$K$h$kMxE@$r<($9Nc$G$"$k$H8@$($^$9!#(B
<P>$B8GBNAG;R$N%G%#%9%/$O<BBN$H$7$F$N(B CHS $B%"%I%l%9$r;}$C$F$$$^$;$s!#(B
$B$7$+$7(B OS $B$H$N%$%s%?!<%U%'!<%9$r6&DL$K$9$k$?$a$K!"(B
$B%I%i%$%P$,8+$;$+$1$N(B CHS $B%"%I%l%9$r3d$jEv$F$k$h$&$K$J$C$F$$$^$9!#(B
<P>
<H2><A NAME="ss3.4">3.4 $B%$%s%?!<%U%'!<%9(B</A>
</H2>
<P>
<!--
disk!interfaces
-->
$B@$$NCf$K$OA*$V$N$K:$$C$F$7$^$&$[$IB?<oB?MM$N%$%s%?!<%U%'!<%9$,$"$j!"(B
$B2A3J$d@-G=$bMM!9$G$9!#:G6a$N$[$H$s$I$N%^%6!<%\!<%I$K$O!"(B
$B?7@$Be$N%A%C%W%;%C%H$N0lIt$H$7$F(B IDE $B$N%$%s%?!<%U%'!<%9$,IUB0$7$F$$$^$9!#(B
<P>SCSI $B%$%s%?!<%U%'!<%95!G=$r;}$C$F$$$k%^%6!<%\!<%I$bB?$/$J$j$^$7$?!#(B
$B$3$l$i$O(B Symbios ($B0JA0$N(B NCR) $B$N%A%C%W$rD>@\(B PCI $B%P%9$K@\B3$7$F$$$^$9!#(B
$B$*;H$$$N%^%6!<%\!<%I$N5!G=$H(B BIOS $B%5%]!<%H$rD4$Y$F$*$/$HNI$$$G$7$g$&!#(B
<P>
<H3>MFM $B$H(B RLL</H3>
<P>
<!--
disk!interfaces!MFM
-->
<!--
disk!interfaces!RLL
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$B$`$+$7$`$+$7!"$^$@(B 20 MB $B$N%O!<%I%G%#%9%/$,A"K>$NL\$GD/$a$i$l$F$$$?:"$K$O!"(B
$B$3$l$i$O:G@hC<$N5;=Q$G$7$?!#:#F|$NMFNL$HHf$Y$k$H!"(B
$B$^$k$G62N5$,$$$?:"$J$s$8$c$J$$$+$H$5$(;W$($^$9$M!#(B
$B$3$l$i$N5;=Q$b62N5F1MM$9$G$KLG$s$G$7$^$$$^$7$?!#(B
$B:#F|$N$b$N$KHf$Y$k$HB.EY$G$b?.Mj@-$G$bNt$k$+$i$G$9!#(B
Linux $B$O(B MFM $B$d(B RLL $B$r%5%]!<%H$7$F$$$^$9$,!"(B
$B$3$l$i$N%$%s%?!<%U%'!<%9$K%I%i%$%V$r7R$0$N$OA4$/$*4+$a$G$-$^$;$s!#(B
$B$=$l$G$b6/$$$F7R$0$J$i!"F1$8$/2a5n$N0dJ*$G$"$k(B DOS $B$rF~$l$F!"(B
$B6[5^MQ$N%Q!<%F%#%7%g%s$K$7$F$*$/$N$,$;$$$<$$$G$7$g$&!#(B
<P>
<H3>ESDI</H3>
<P>
<!--
disk!interfaces!ESDI
-->
ESDI $B$O(B SMD $B$K9g$o$;$F:n$i$l$?5;=Q$G$7$?!#(B
SMD $B%$%s%?!<%U%'!<%9$O(B
$B!V5pBg$J!W%3%s%T%e!<%?$G9-$/;H$o$l$?%$%s%?!<%U%'!<%9$G$9$,!"$3$l$r(B
ST506 $B%$%s%?!<%U%'!<%9$GMQ$$$i$l$F$$$?%1!<%V%k%;%C%H$K9g$o$;$k$?$a$N$b$N$,(B
ESDI $B$@$C$?$N$G$9!#(B
SMD $B$G;H$o$l$F$$$?(B 60 $B%T%s(B + 26 $B%T%s$N%3%M%/%?$r%Z%"$GMQ0U$9$k$h$j!"(B
$BN><T$r$^$H$a$?(B ST506 $B$N%;%C%H$N$[$&$,JXMx$@$C$?$N$G$7$?!#(B
ST506 $B$O!V4VH4$1!W$J%$%s%?!<%U%'!<%9$G!"(B
$B%3%s%H%m!<%i$H%[%9%H%3%s%T%e!<%?$K$$$m$$$m$J:n6H$r$9$Y$FG$$;$F$$$^$7$?(B
(CHS $B$N>l=j$N7W;;!"%X%C%I0LCV$NDI@W$J$I$J$I(B)$B!#(B
ST506 $B$K$O%3%s%H%m!<%i$,I,MW$G!"(B
$B$3$l$O%j%+%P!<$5$l$?%G!<%?$+$i%/%m%C%/$r<h$j=P$7$?$j!"(B
$B%a%G%#%">e$G$N%H%i%C%/9=B$$NJ*M}E*$J0LCV$r(B
1 $B%S%C%H$:$D@)8f$7$?$j$9$k$b$N$G$7$?!#(B
MFM $B$d(B RLL, ERLL/ARLL $B%b%8%e%l!<%7%g%s5!9=$J$I$r4^$a$k$3$H$K$9$l$P!"(B
ST506 $B$O$*$h$=(B 10 $BG/$[$I$N<wL?$rJ]$A$^$7$?!#(B
$B0lJ}(B ESDI $B$O%$%s%F%j%8%'%s%H$J%$%s%?!<%U%'!<%9$G!"(B
1 $B%I%i%$%V$"$?$j(B 3$B!A(B4 $B$D$b$N%^%$%/%m%W%m%;%C%5$r;H$&$N$,IaDL$G$7$?!#(B
$B%H%i%C%/$N%U%)!<%^%C%H!"%G!<%?E>Aw!"%7!<%/F0:n$J$I$N(B
$B9b%l%Y%k$N%3%^%s%I$,;H$($^$7$?!#(B
$B%G!<%?%9%H%j!<%`$+$i$N%/%m%C%/%j%+%P%j$d!"(B
$B%/%m%C%/%i%$%s$N%I%i%$%V$H(B NRZ $B$X$N%G!<%?I=<($b%I%i%$%VB&$G$G$-$^$7$?!#(B
$B$?$@$7%(%i!<=$@5$O%3%s%H%m!<%i$N<u$1;}$A$G$7$?!#(B
ESDI $B$G$O2DJQD9%S%C%HL)EY$G$N5-O?$b2DG=$G$7$?!"(B
$B$H$$$&$+B>$K$b$$$m$$$m$J%G!<%?JQD45;=Q$,;H$($^$7$?!#(B
$B%G!<%?$O%I%i%$%V$G%m!<%+%k$K@8@.!&J,2r$G$-$?$+$i$G$9!#(B
ESDI $B$N5;=Q$O!"$=$NB?$/$,8e$K(B IDE $B$K<h$j9~$^$l$^$7$?$,!"(B
SCSI $B$,%]%T%e%i!<$K$J$k$K$D$l!"(B
$B%3%s%T%e!<%?$G$OMxMQ$5$l$J$$$h$&$K$J$C$F$$$-$^$7$?!#(B
ESDI $B$O(B 10 $BG/$N<wL?$rJ]$C$?$H=q$-$^$7$?$,!"(B
$B$=$l$O(B PC $B$G$N$3$H$G$O$J$/!"(B
$B%5!<%P$J$I!V5pBg$J!W%7%9%F%`$G$N$3$H$G$7$?!#(B
<P>
<P>
<H3>IDE $B$H(B ATA</H3>
<P>
<!--
disk!interfaces!IDE
-->
<!--
disk!interfaces!ATA
-->
$B$=$N8e$N5;=Q$N?JJb$K$h$C$F!"(B
$B%I%i%$%V$r@)8f$9$k2sO)$O(B ISA $B%9%m%C%H$+$i%I%i%$%VK\BN$KCV$+$l$k$h$&$K$J$j!"(B
IDE (Integrated Drive Electronics) $B$,CB@8$7$^$7$?!#(B
IDE $B$OC1=c$+$D0B2A$G!"$^$?$=$l$J$j$NB.EY$r;}$C$F$$$?$?$a!"(B
$BB?$/$N(B BIOS $B@_7W<T$,$3$N5;=Q$rMQ$$$^$7$?!#$=$N7k2L(B
($B%3%s%T%e!<%?6H3&$K$ONI$/$"$k$3$H$G$9$,(B) $BLLE]$JLdBj$,5/$3$j$^$7$?!#(B
$B%X%C%I?t$,(B 16 $B$^$G$H$$$&(B IDE $B$N@)8B$H!"%7%j%s%@?t$,(B 1024 $B$^$G$H$$$&(B BIOS
$B$N@)8B$,=E$M9g$o$5$C$F!"0-L>9b$-(B 504 MB $B$N@)8B$,@8$l$?$N$G$9!#(B
$B$5$i$K%3%s%T%e!<%?6H3&$NEAE}$K=,$$!"(B
$B$3$NLdBj$N2r7h$K$O$=$N>l$7$N$.$N$*AFKv$JJ}K!$,A*Br$5$l$^$7$?!#(B
$B$=$N7k2LA4$/8_49@-$N$J$$?tB?$/$NJQ49J}K!!"(B
$BMM!9$J;EMM$N(B BIOS $B$,MpN)$7$^$7$?!#(B
$B$3$N7k2L(B Linux $B$G(B BIOS
$B$+$i%I%i%$%VMFNL$N>pJs$r<hF@$9$k$N$,Hs>o$KLLE]$K$J$j$^$7$?!#(B
$B%$%s%9%H!<%kJ8=q$r6y$+$i6y$^$GCzG+$KFI$_!"(B
$B;H$C$F$$$k(B BIOS $B$N<oN`$H%P!<%8%g%s$rD4$Y$J$1$l$P$J$i$J$/$J$C$?$N$G$9!#(B
$B$7$+$79,$$$J$3$H$K(B Linux $B$G$O(B BIOS $B$r7PM3$;$:$K(B
$BD>@\%+!<%M%k$K%I%i%$%V$N%Q%i%a!<%?(B ($B=>$C$FMFNL$b(B) $B$rEO$9$3$H$b$G$-$^$9!#(B
LILO $B$H(B Loadlin $B$N%I%-%e%a%s%H$rNI$/D4$Y$F$_$F$/$@$5$$!#(B
IDE $B$H(B ATA (AT Attachment) $B$H$OF1$8$b$N$G$9!#(B IDE $B$G$N%G!<%?E>Aw$O(B
CPU $B<gF37?$N(B Programmed I/O (PIO) $B$G$9!#(B
$B$h$j8zN(E*$J(B Direct Memory Access (DMA) $B5;=Q$O;H$o$l$F$$$^$;$s!#(B
$BE>AwB.EY$N>e8B$O(B 8.3 MB/s $B$G$9!#(B
<P>
<H3>EIDE, Fast-ATA and ATA-2</H3>
<P>
<!--
disk!interfaces!EIDE
-->
<!--
disk!interfaces!Fast-ATA
-->
<!--
disk!interfaces!ATA-2
-->
$B$3$N(B 3 $B$D$OBgBNF1$8$b$N$G$9!#(B Fast-ATA $B$H(B ATA-2 $B$OF1$8$b$N$G!"(B
EIDE $B$O$3$l$K$5$i$K(B ATAPI $B$r2C$($?$b$N$G$9!#(B
ATA-2 $B$O:#F|Hs>o$K9-$/MQ$$$i$l$F$*$j!"(B
IDE $B$h$j9bB.$G(B DMA $B$b;H$C$F$$$^$9!#(B
$BE>AwB.EY$O(B 16.6 MB/s $B$KA}2C$7$F$$$^$9!#(B
<P>
<P>
<H3>Ultra-ATA</H3>
<P>
<!--
disk!interfaces!Ultra-ATA
-->
$B$h$j9bB.$J?7$7$$(B DMA $B%b!<%I$G!"(B
EIDE PIO-Mode 4 $B$N$*$h$=#2G\$NB.EY(B (33 MB/s) $B$G$9!#(B
Ultra-ATA $B%b!<%I$r;}$D%G%#%9%/$H;}$?$J$$%G%#%9%/$OF1$8%1!<%V%k$G6&B8$G$-!"(B
$B$=$l$K$h$C$F9bB.$JJ}$N%I%i%$%V$N%9%T!<%I$,Dc2<$9$k$3$H$b$"$j$^$;$s!#(B
Ultra-ATA $B%$%s%?!<%U%'!<%9$OEE5$E*$K$O%N!<%^%k$N(B
Fast-ATA $B%$%s%?!<%U%'!<%9$HEy2A$G!"%1!<%V%k$N:GBgD9$bF1$8$G$9!#(B
<P>$B:G?7$N@=IJ$O(B 66 MB/s $BHG$N(B DMA/66 $B$G$9!#(B
<P>
<H3>ATAPI</H3>
<P>
<!--
disk!interfaces!ATAPI
-->
ATA $B%Q%1%C%H%$%s%?!<%U%'!<%9$O(B
IDE $B$N%]!<%H$G(B CD-ROM $B%I%i%$%V$rMxMQ$9$k$?$a$K@_7W$5$l$^$7$?!#(B
IDE $B$HF1MM!"(BATAPI $B$O0B2A$G%7%s%W%k$G$9!#(B
<P>
<H3>SCSI</H3>
<P>
<!--
disk!interfaces!SCSI
-->
SCSI (Small Computer System Interface) $B$O!"(B
$B%I%i%$%V$@$1$G$J$/%G%#%9%/%"%l%$$d%W%j%s%?!"%9%-%c%J$J$I!"(B
$B?'!9$J$b$N$r7R$2$kB?L\E*%$%s%?!<%U%'!<%9$G$9!#(B
SCSI $B$O%^%k%A%?%9%/4D6-$KE,$7$F$$$k$?$a!"(B
$B%o!<%/%9%F!<%7%g%s$J$I$N%O%$%(%s%I5!$KMQ$$$i$l$F$-$^$7$?(B
($B$7$?$,$C$F(B "Small" $B$H$$$&$N$O@53N$G$O$J$$$+$b$7$l$^$;$s(B)$B!#(B
<P>SCSI $B$N%P%s%II}$OI8=`$G(B 8 $B%S%C%H$G!"(B 8 $B$D$N%G%P%$%9$r@\B3$G$-$^$9!#(B
wide SCSI $B$H8F$P$l$k5,3J$G$O%P%s%II}$O(B 16 $B%S%C%H(B
($B$7$?$,$C$FE>Aw%/%m%C%/$,F1$8$J$iE>AwNL$O(B 2 $BG\(B)$B!"(B
$B@\B32DG=$J%G%P%$%9$O(B 16 $B8D$H$J$C$F$$$^$9!#(B
$B%[%9%H%"%@%W%?$b$R$H$D$N%G%P%$%9$H$_$J$5$l$^$9!#(B
$BIaDL$O(B 7 $BHV$,%[%9%H%"%@%W%?$N(B ID $B$K3d$jEv$F$i$l$^$9!#(B
32 $B%S%C%H$N(B wide $B%P%9$r;H$&$3$H$b$G$-$^$9$,!"(B
$B$3$N>l9g$9$Y$F$N?.9f@~$r@\B3$9$k$K$O!"(B
$BDL>o%1!<%V%k$,(B 2 $B%;%C%HI,MW$K$J$j$^$9!#(B
<P>$B8E$$I8=`$N5,3J$G$OE>AwB.EY$O(B 5 MB/s $B$G$7$?$,!"?7$7$$(B fast-SCSI $B$G$O(B
10 MB/s $B$KA}$($F$$$^$9!#:G6a$G$O(B ultra-SCSI (Fast-20 $B$H$b8F$P$l$^$9(B)
$B$H$$$&5,3J$,Dj$^$j!"(B 8 $B%S%C%HI}$N%P%9$G(B
20 MB/s $B$NE>AwNL$r;}$D$h$&$K$J$j$^$7$?!#(B
$B:G?7$N!"DcEE05:9F0?.9f(B (Low Voltage Differntial signal: LVD signal)
$B$rMQ$$$kJ}<0$G$O!"F1DxEY$N9b$$B.EY$K2C$(!"(B
$B0JA0$h$j$:$C$HD9$$%1!<%V%k$r;H$&$3$H$,$G$-$^$9!#(B
<P>$B$5$i$K:G6a$K$O!"$b$C$HB.$$5,3J$bF3F~$5$l$F$$$^$9!#(B
SCSI 160 ($B$b$H$NL>A0$O(B SCSI 160/m) $B$G!"(B 16 $B%S%C%HI}$N%P%9$rMQ$$!"(B
$B$J$s$H(B 160 MB/s $B$NG=NO$r;}$C$F$$$^$9!#(B
$B<BAu$O$^$@$^$@$G$9$,!"(B
10000 RPM$B%G%#%9%/$NCf$K$O(B 40 MB/s $B$NE>Aw$rDj>oE*$K9T$($k$b$N$b$"$j$^$9!#(B
$B$3$N$h$&$J%G%#%9%/$r(B 6 $BBf=8$a$F(B RAID $B$K$9$l$P!"(B
$B$3$s$J%P%9$bK0OB(B ($B$=$7$F(B PCI $B%P%9$bK0OB(B) $B$5$;$F$7$^$&$3$H$,$G$-$^$9!#(B
$B8=CJ3,$G$O!"L@$i$+$K:G9b5i$N%O%$%(%s%I%5!<%PMQ$N$b$N$G$9!#(B
$B$3$N5,3J$K4X$9$k$h$j>\$7$$>pJs$O(B
<A HREF="http://www.ultra160-scsi.com/">The Ultra 160 SCSI home page</A>
$B$+$iF~<j$G$-$^$9!#(B
<P>$B:G6a(B Adaptec $B$O!"H`$i$N(B 160 $B%[%9%H%"%@%W%?MQ$N(B Linux $B%I%i%$%P$N(B
$BH/I=$r$7$^$7$?!#>\$7$$$3$H$,$o$+$j$7$@$$!"$3$3$G$b$*CN$i$;$7$^$9!#(B
<P>$BDL>o(B SCSI $B$O(B (E)IDE $B$h$j$b9b@-G=$G$9$,!"2A3J$b9b$$>l9g$,B?$$$h$&$G$9!#(B
$B%I%i%$%V$b(B SCSI $B$NJ}$,(B IDE $B$h$j@-G=$,9b$$>l9g$,B?$$$G$9!#(B
$B0lJ}%G%P%$%9$rDI2C$9$k$N$O(B SCSI $B$NJ}$,4JC1$G!"(B
$B$[$H$s$I$N>l9g$OC1$K%G%P%$%9$rH4$-:9$7$9$k$@$1$G$9(B
($BCf$K$OEE8;$rF~$l$?$^$^$G$3$l$r$d$k?M$b$$$^$9(B)$B!#(B
$B$3$l$OJ#?t$N%7%9%F%`$r;}$C$F$$$k>l9g$K$OHs>o$KJXMx$G!"(B
$B$I$l$+$N%7%9%F%`$,2?$i$+$NM}M3$G8N>c$7$F$b!"(B
$B%G%P%$%9$r0\$9$@$1$G$9$_$^$9!#(B
<P>SCSI $B$K4X$7$F$O$?$a$K$J$kJ8=q$,$?$/$5$s=P$F$$$^$9!#(B SCSI HOWTO $B$d(B
SCSI FAQ $B$J$I$O!"(B Usenet $B%K%e!<%9$K$b%]%9%H$5$l$F$$$^$9!#(B
<P>SCSI $B$K$O%P%C%/%"%C%W$N$?$a$N%F!<%W%I%i%$%V$d!"(B
$B0lIt$N%W%j%s%?$d%9%-%c%J$r@\B3$G$-$k$H$$$&MxE@$b$"$j$^$9!#(B
$B$^$?JL!9$N%3%s%T%e!<%?$r0l$D$N(B SCSI $B%P%9$K7R$.!"(B
$B%G%P%$%9$r6&M-$5$;$k$3$H$G!"D69bB.$N%M%C%H%o!<%/$r:n$k$3$H$5$(2DG=$G$9!#(B
$B:n6H$O?J9TCf$N$h$&$G$9$,!"(B
$B@\B3$5$l$?JL!9$N%3%s%T%e!<%?$N4V$G%-%c%C%7%e$N@09g@-$rJ]>Z$9$k$N$,Fq$7$/!"(B
$B$=$l$[$I4JC1$J;E;v$G$O$J$$$h$&$G$9!#(B
<P>SCSI $BHV9f$OD4Dd(B (arbitration) $B$K$b;H$o$l$^$9!#(B
$BJ#?t$N%I%i%$%V$,MW5a$rF1;~$K=P$7$?>l9g!"(B
$B$b$C$H$bDc$$HV9f$N%I%i%$%V$,M%@h$5$l$^$9!#(B
<P>$B?7$7$$(B SCSI $B%+!<%I$K$O!"%?%$%W$N0[$J$kJ#?t$N(B SCSI $B%G%P%$%9$r!"(B
$B$=$l$>$l:GE,$JB.EY$GF1;~$K;H$($k$h$&$J$b$N$b$"$j$^$9!#(B
<P>
<P>
<H2><A NAME="ss3.5">3.5 $BG[@~(B</A>
</H2>
<P>
<!--
disk!cabling
-->
$B%O!<%I%&%'%"4s$j$NOC$r$9$k$D$b$j$O$"$^$j$J$+$C$?$N$G$9$,!"(B
$BG[@~$K4X$7$F$O>/!9?($l$F$*$/I,MW$,$"$k$h$&$K46$8$^$7$?!#(B
$BFC$K5;=QE*$KFq$7$$ItJ,$G$O$J$$$N$G$9$,!"(B
$B$3$3$,$$$m$$$m$JLdBj$N860x$K$J$C$F$$$k$3$H$,B?$$$N$G$9!#(B
$B:#F|$N$h$&$K9bB.$JE>Aw$,9T$o$l$k$h$&$K$J$k$H!"(B
$B%1!<%V%k$O9b<~GH%G%P%$%9$H$7$F9M$($kI,MW$,$"$j!"(B
$B%$%s%T!<%@%s%9%^%C%A%s%0$,=EMW$K$J$j$^$9!#(B
$B$7$+$k$Y$-A<CV$r9T$C$F$*$+$J$$$H?.Mj@-$OHs>o$KDc2<$7$^$9$7!"(B
$B$^$C$?$/F0$+$J$/$J$k$3$H$b$"$j$($^$9!#(B
SCSI $B%[%9%H%"%@%W%?$N0lIt$N@=IJ$O!"$3$NE@$KHs>o$KIR46$G$9!#(B
<P>$B%7!<%k%I%1!<%V%k$O%7!<%k%I$5$l$F$$$J$$%1!<%V%k$h$jNI$$$K7h$^$C$F$$$^$9$,!"(B
$B2A3J$b$H$F$b9b2A$K$J$j$^$9!#>/!9Cm0U$rJ'$($P!"(B
$B0B2A$J%7!<%k%I$N$J$$%1!<%V%k$G$b=<J,$J@-G=$,F@$i$l$^$9!#(B
<P>
<UL>
<LI>Fast-ATA $B$H(B Ultra-ATA $B$G$O!"(B
$B%1!<%V%k$N:GBgD9$O(B 45 cm (18$B%$%s%A(B) $B$H7h$a$i$l$F$$$^$9!#(B
$BFs$D$N(B IDE $B%A%c%s%M%k$N%G!<%?@~$,7k@~$5$l$F$$$k$h$&$J%^%6!<%\!<%I$bB?$/!"(B
$B$3$l$i$G$O(B 2 $B$D$N%A%c%s%M%k$,(B <B>$B0lK\$N(B</B> $B%1!<%V%k$H$7$F07$o$l$^$9!#(B
$B$$$:$l$K$7$F$b!"(B EIDE $B$N%1!<%V%k$O$G$-$k8B$jC;$/$9$Y$-$G$9!#(B
$B860xITL@$N%/%i%C%7%e$d4V7gE*$J%G!<%?GK2u$J$I$,@8$8$?>l9g$K$O!"(B
$B%1!<%V%k$rD4$Y$F8+$k2ACM$O$"$k$G$7$g$&!#(B
$B$h$jDcB.$J(B PIO $B%b!<%I$r;n$7$?$j!"(B
$BFsHVL\$N%A%c%s%M%k$r30$7$F$_$FLdBj$,2r7h$9$k$+$I$&$+8+$F$_$F$/$@$5$$!#(B
</LI>
<LI>$B%1!<%V%k$O$G$-$k$@$1C;$/$7$^$7$g$&!#$7$+$7(B
ultra SCSI $B$N>l9g$K$O:GDc(B 30 cm $B$N4V3V$,!"(B
$B%G%#%U%!%l%s%7%c%k(B SCSI $B$N>l9g$O(B 60 cm $B$N4V3V$,I,MW$J$3$H$bK:$l$J$$$h$&$K!#(B
</LI>
<LI>$B%1!<%V%k$H%G%P%$%9$N4V$KD9$$%9%?%V(B (stub) $B$rMQ$$$k$N$O;_$a!"(B
$B%1!<%V%k$N%W%i%0$O%I%i%$%V$KD>$K@\B3$9$k$h$&$K$7$^$7$g$&!#(B
</LI>
<LI>SCSI $B$NG[@~$KCV$1$k@)8B0lMw(B:
<BLOCKQUOTE><CODE>
<PRE>
Bus Speed (MHz) | Max Length (m)
--------------------------------------------------
5 | 6
10 (fast) | 3
20 (fast-20 / ultra) | 3 (max 4 devices), 1.5 (max 8 devices)
xx (differential) | 25 (max 16 devices
--------------------------------------------------
</PRE>
</CODE></BLOCKQUOTE>
</LI>
<LI>SCSI $B%G%P%$%9$N%?!<%_%M!<%7%g%s$O(B
$B@5$7$$0LCV$N$b$N$rM-8z$K$7$^$7$g$&!#(B
SCSI $B%A%'!<%s$NN>C<$G$9!#(B
$B%[%9%H%"%@%W%?$K$b%*%s%\!<%I$N%?!<%_%M!<%7%g%s$,$D$$$F$$$k$+$b$7$l$^$;$s!#(B
</LI>
<LI>$B%7!<%k%I%1!<%V%k$H%7!<%k%IL5$7$N%1!<%V%k$r:.$<$F;H$o$J$$!"(B
$B%1!<%V%k$r6bB0$N<~$j$K4,$+$J$$!"(B
$B6bB0ItJ,$rG[@~$+$i1s$6$1$k$h$&$K$9$k!"$J$I$NCm0U$r$7$F$/$@$5$$!#(B
$BG[@~$KITO"B3$JItJ,$,$"$k$H!"$=$3$G%$%s%T!<%@%s%9$N%_%9%^%C%A$,@8$8!"(B
$B?.9f$NH?<M$,5/$3$C$F%1!<%V%k$N%N%$%:$H$J$C$F$7$^$$$^$9!#(B
$B$3$NLdBj$O%^%k%A%A%c%s%M%k$N%3%s%H%m!<%i$G$O$h$j%7%S%"$K$J$j$^$9!#(B
$B:G6a!"H/K"%W%i%9%A%C%/$G%1!<%V%k$N<~$j$rJ$$$!"(B
$B%1!<%V%k$,6bB0ItJ,$K6a$E$-$9$.$J$$$h$&$K$9$k$HNI$$!"(B
$B$H65$($F$/$l$??M$,$$$^$7$?!#(B
$B$G$bK\Ev$NLdBj$O!"%1!<%9$NCf$,:.$s$G$$$k$3$H$K$"$k$N$G$9$h$M!#(B</LI>
</UL>
<P>SCSI $B$NG[@~$d=*C<=hM}$K4X$9$k$h$j>\$7$$>pJs$O(B
$B%M%C%H$N$?$/$5$s$N(B web $B%Z!<%8$K=q$+$l$F$$$^$9!#(B
<P>
<H2><A NAME="ss3.6">3.6 $B%[%9%H%"%@%W%?(B</A>
</H2>
<P>
<!--
disk!adapters
-->
<!--
disk!host adapters
-->
<P>$B%I%i%$%V$+$i$N%$%s%?!<%U%'!<%9%1!<%V%k$r7R$.!"(B
$B%3%s%T%e!<%?$N%P%9$H$NCgN)$A$r$7$^$9!#(B
$B%3%s%T%e!<%?%P%9$NB.EY$H%I%i%$%V$NB.EY$OF1DxEY$N$b$N$rMxMQ$9$Y$-$G!"(B
$B$=$&$G$J$$$H$I$A$i$+$,%\%H%k%M%C%/$K$J$j$^$9!#(B
$BNc$($P(B RAID 0 $B$N%G%#%9%/%;%C%H$r(B
ISA $B$N%P%9$K7R$$$@$j$9$k$H$=$&$$$&$3$H$K$J$j$^$9!#(B
$B:G6a$N%3%s%T%e!<%?$N$[$H$s$I$G$O(B
32 $B%S%C%H$N(B PCI $B%P%9$r;H$&$3$H$,$G$-$^$9!#(B
$B$3$l$O(B 132 MB/s $B$NE>AwB.EY$r;}$C$F$$$^$9$N$G!"(B
$B$7$P$i$/$N4V$O%\%H%k%M%C%/$K$J$k$3$H$J$/MxMQ$G$-$k$G$7$g$&!#(B
<P>$B%I%i%$%V$N@)8f2sO)$NBgItJ,$,%I%i%$%VK\BN$K<}$a$i$l$k$h$&$K$J$k$H!"(B
$B;D$j$NItJ,$G$"$k(B (E)IDE $B%$%s%?!<%U%'!<%9$OHs>o$K%3%s%Q%/%H$K$J$j!"(B
PCI $B$N%A%C%W%;%C%H$KI8=`E*$KMQ0U$5$l$k$h$&$K$J$j$^$7$?!#(B
SCSI $B%[%9%H%"%@%W%?$O$b$&>/$7J#;($G!"(B
$B@lMQ$N(B CPU $B$r;H$C$?$j$9$k$3$H$bB?$$$?$a!"(B IDE $B$KHf$Y$F9b2A$G$9!#(B
$B$^$@(B PCI $B%A%C%W%;%C%H$K$b<h$j9~$^$l$F$$$J$$$h$&$G$9!#(B
$B$b$A$m$s5;=Q$,?JJb$9$l$P>u67$OJQ$o$k$G$7$g$&!#(B
<P>$B%[%9%H%"%@%W%?$K$OFH<+$N%-%c%C%7%e$d3HD%@)8f5!G=$r;}$C$F$$$k$b$N$b$"$j$^$9!#(B
$B$7$+$7$3$l$OK\Mh(B OS $B$N5!G=$N$O$:$J$N$G!"(B
$B;H$C$F$$$k(B OS $B$K$h$C$F8z2L$,$"$C$?$j$J$+$C$?$j$7$^$9!#(B
$B86;OE*$J(B OS ($BFC$KL>$rHk$9(B :-) $B$G$O9b$$8z2L$,F@$i$l$k$3$H$b$"$j$^$9$,!"(B
Linux $B$O$b$H$b$HNI$/$G$-$F$$$k$N$G!"(B
$B$3$l$i$N5!G=$K$h$C$FF@$i$l$k8z2L$O$?$$$7$?J*$G$O$"$j$^$;$s!#(B
<P>DPT $B%3%s%H%m!<%i$N%I%i%$%P$r=q$$$?(B Mike Neuffer $B$K$h$l$P!"(B
DPT $B$N%3%s%H%m!<%i$O$H$F$b8-$/!"(B
$B=<J,$J%-%c%C%7%e%a%b%j$r$"$F$,$C$F$d$l$PHs>o$K@-G=$,8~>e$9$k$=$&$G$9!#(B
$B$^$?$3$N;v$+$iH`$O!"(B
$B%$%s%F%j%8%'%s%H$J(B SCSI $B%3%s%H%m!<%i$G@-G=$,8~>e$7$J$$$N$O!"(B
$B%-%c%C%7%e%3%s%H%m!<%i$NJ}$NLdBj$G$O$J$$$+$H8@$C$F$$$^$9!#(B
<P>
<H2><A NAME="ss3.7">3.7 $B%^%k%A%A%c%s%M%k%7%9%F%`(B</A>
</H2>
<P>
<!--
disk!multi-channel
-->
$B%9%k!<%W%C%H$r>e$2$k$K$O!":GBg$N%\%H%k%M%C%/$rFCDj$7!"(B
$B$=$l$rGS=|$9$kI,MW$,$"$j$^$9!#(B
$B%7%9%F%`$K$h$C$F$O(B ($BFC$K$?$/$5$s$N%I%i%$%V$r@\B3$7$F$$$k%7%9%F%`$G$O(B)
$BJ#?t$N%3%s%H%m!<%i$rJBNsF0:n$5$;$k$3$H$G8z2L$,F@$i$l$k$3$H$,$"$j$^$9!#(B
$B$3$l$O(B SCSI $B$G$b(B IDE $B$G$bF1$8$G$9(B
(IDE $B$O$b$H$b$H(B 2 $B%A%c%s%M%kIU$$$F$$$k%O!<%I%&%'%"$,B?$$$G$7$g$&(B)$B!#(B
Linux $B$G$b$3$N$h$&$JF0:n$O%5%]!<%H$5$l$F$$$^$9!#(B
<P>RAID $B%3%s%H%m!<%i$NCf$K$O!"Fs$D$^$?$O;0$D$N%A%c%s%M%k$,IU$$$F$$$F!"(B
$B%G%#%9%/%"%/%;%9$rJL!9$N%A%c%s%M%k$K?6$jJ,$1$k$3$H$,$G$-$k$h$&$J$b$N$b(B
$BB8:_$7$F$$$^$9!#JL$N8@$$J}$r$9$l$P!"(B
2 $B%A%c%s%M%k$N%3%s%H%m!<%i$KBP$7$F(B
RAID $B$K$7$?$$(B 2 $BBf$N(B SCSI $B%I%i%$%V$,$"$k>l9g$K$O!"(B
$B$=$l$i$OJL!9$N%A%c%s%M%k$K@\B3$9$Y$-$@!"$H$$$&$3$H$G$9!#(B
<P>
<H2><A NAME="ss3.8">3.8 $B%^%k%A%\!<%I%7%9%F%`(B</A>
</H2>
<P>
<!--
disk!multi-board
-->
$B0lBf$N%^%7%s$K$O(B SCSI $B$H(B IDE $B$NN>J}$r7R$0$3$H$,$G$-$^$9$,!"(B
$B$5$i$K(B 2 $B$D0J>e$N(B SCSI $B%3%s%H%m!<%i$r@\B3$9$k$3$H$b$G$-$^$9!#(B
$B2DG=$J%3%s%H%m!<%i$NAH9g$;$O(B SCSI-HOWTO $B$r%A%'%C%/$7$F$/$@$5$$!#(B
$B$5$i$K!"J#?t$N(B SCSI, IDE $B%3%s%H%m!<%i$r%W%m!<%V$9$k$h$&$K(B
$B%+!<%M%k$K65$($F$d$kI,MW$,$"$k$G$7$g$&!#(B
$B$3$l$O%V!<%H;~$K%+!<%M%k$K%Q%i%a!<%?$rM?$($k$3$H$K$h$C$F<B8=$7$^$9!#(B
$BNc$($P(B LILO $B$J$I$,;H$($^$9!#$3$l$K$O(B SCSI $B$d(B LILO $B$N(B HOWTO
$B$r%A%'%C%/$7$F$/$@$5$$!#(B
<P>$B%^%k%A%\!<%I$N%7%9%F%`$G$O!"%G%#%9%/$NG[CV$r@5$7$/@_Dj$9$l$P!"(B
$BBg$-$JB.EY@-G=$N8~>e$,4|BT$G$-$^$9(B ($B$H$/$K(B RAID 0 $B$G$O(B)$B!#(B
$B%3%s%H%m!<%i!<$d%I%i%$%V$r8_$$0c$$$K$7$F!"(B
md $B$N(B RAID $B%G%P%$%9$K@5$7$$=g=x$G%I%i%$%V$rDI2C$7$F$/$@$5$$!#(B
$B%3%s%H%m!<%i(B 1 $B$K%I%i%$%V(B <CODE>sda</CODE> $B$H(B <CODE>sdc</CODE>
$B$,!"%3%s%H%m!<%i(B 2 $B$K%I%i%$%V(B <CODE>sdb</CODE> $B$H(B <CODE>sdd</CODE>
$B$,@\B3$5$l$F$$$?$H$7$^$9$H!"JBNs@-$r:GBg$K$9$k$K$O(B
<CODE>sda - sdc - sdb - sdd</CODE> $B$N=g=x$G7R$0$3$H$G$9!#(B
$B$J$<$J$i8_$$0c$$$K@\B3$9$k$H!"(B
2 $B%/%i%9%?0J>e$NFI$_=q$-$,Fs$D$N%3%s%H%m!<%i$K$^$?$,$k$h$&$K$J$k$+$i$G$9!#(B
<CODE>sda - sdb - sdc - sdd</CODE> $B$G$O$"$^$j8z2L$,>e$,$j$^$;$s!#(B
<P>
<A NAME="drive-names"></A> <P>
<P>$BF1$8<jK!$O(B IDE $B$K$b;H$($^$9!#$[$H$s$I$N%^%6!<%\!<%I$G$O!"(B
4 $B$D$N(B IDE $B%]!<%H$,;H$($^$9!#(B
<UL>
<LI> <CODE>hda</CODE> primary master</LI>
<LI> <CODE>hdb</CODE> primary slave</LI>
<LI> <CODE>hdc</CODE> secondary master</LI>
<LI> <CODE>hdd</CODE> secondary slave</LI>
</UL>
$B$3$3$G(B primary $B$N(B 2 $BBf!"(B
secondary $B$N(B 2 $BBf$O$=$l$>$l%U%i%C%H%1!<%V%k$r6&M-$7$^$9!#(B
$B@h?JE*$J%A%C%W%;%C%H$G$O!"$3$NFsAH$O$=$l$>$lFHN)$7$F$$$^$9!#(B
$B$7$?$,$C$F(B RAID $B$r9=@.$9$k$H$-$N:GE,$J=g=x$O(B
<CODE>hda - hdc - hdb - hdd</CODE> $B$G!"(B
$B$3$N$H$-N>%A%c%s%M%k$NJBNs@-$,$b$C$H$b4|BT$G$-$k$3$H$K$J$j$^$9!#(B
<P>
<H2><A NAME="ss3.9">3.9 $BB.EYHf3S(B</A>
</H2>
<P>
<!--
disk!speed comparison
-->
$B0J2<$NI=$OE>AwB.EY$r$^$H$a$?$b$N$G$9!#(B
$B$?$@$7$3$l$i$OM}O@>e$N:GBgCM$K2a$.$J$$$3$H$KCm0U$7$F$/$@$5$$!#(B
$BE>AwB.EY$NC10L$O(B MB/s $B$G$9!#%P%9$NI}$NC10L$O%S%C%H$G$9!#(B
<P>
<H3>$B%3%s%H%m!<%i(B</H3>
<P>
<!--
disk!speed comparison!controllers
-->
<BLOCKQUOTE><CODE>
<PRE>
IDE : 8.3 - 16.7
Ultra-ATA : 33 - 66
SCSI :
Bus width (bits)
Bus Speed (MHz) | 8 16 32
--------------------------------------------------
5 | 5 10 20
10 (fast) | 10 20 40
20 (fast-20 / ultra) | 20 40 80
40 (fast-40 / ultra-2) | 40 80 --
--------------------------------------------------
</PRE>
</CODE></BLOCKQUOTE>
<P>
<P>
<H3>$B%P%9$N7A<0(B</H3>
<P>
<!--
disk!speed comparison!bus types
-->
<BLOCKQUOTE><CODE>
<PRE>
ISA : 8-12
EISA : 33
VESA : 40 (Sometimes tuned to 50)
PCI
Bus width (bits)
Bus Speed (MHz) | 32 64
--------------------------------------------------
33 | 132 264
66 | 264 528
--------------------------------------------------
</PRE>
</CODE></BLOCKQUOTE>
<P>
<H2><A NAME="ss3.10">3.10 $B%Y%s%A%^!<%/(B</A>
</H2>
<P>
<!--
disk!benchmarking
-->
<!--
disk!benchmarking!bonnie
-->
<!--
disk!benchmarking!iozone
-->
<!--
disk!Bonnie Raitt
-->
$B$3$l$O$H$F$b!"$H$C$F$bFq$7$$LdBj$G$9!#(B
$B$3$3$G$O$3$NCOMk86$KBP$9$k7Y9p$r$$$/$D$+5s$2$k$K$H$I$a$F$*$-$^$9!#(B
$B$^$:!"<B:]$K2?$i$+$N0UL#$r;}$D%Y%s%A%^!<%/$r9T$$!"(B
$B$3$N7k2L$+$iM-1W$J7kO@$rF3$-=P$9$N$O!"$H$F$bFq$7$$$3$H$J$s$G$9!#(B
$B$H$O$$$C$F$b!"$3$l$/$i$$$G$d$a$k$h$&$J?M$O$$$^$;$s$h$M(B...
<P>$B$I$A$i$+$H$$$&$H!"<+J,<+?H$N%7%9%F%`$,0JA0$HF1$8$/$i$$B.$$$^$^$G$"$k$+(B
($B$D$^$j!"CY$/$J$C$F$$$J$$$+(B) $B$r?GCG$9$k$?$a$K(B
$B%Y%s%A%^!<%/$r;H$&$N$,$$$$$G$7$g$&!#(B
$B$^$?Nc$($P!"C1=c$J%U%!%$%k%7%9%F%`$+$i(B
RAID $B$KJQ99$7$?>l9g$O$+$J$j$N8z2L$,8+9~$a$k$O$:$G$9$+$i!"(B
$B@-G=$KJQ2=$,$J$1$l$P$I$3$+$,$*$+$7$$!"$J$I$N%A%'%C%/$K$b;H$($k$G$7$g$&!#(B
<P>$B%Y%s%A%^!<%/$r9T$&$H$-$K$O!"<+J,FH<+$NJ}K!$O;H$o$:!"(B
<CODE>iozone</CODE> $B$d(B <CODE>bonnie</CODE> $B$r;2>H$9$k$h$&$K$7$^$7$g$&!#(B
$B$3$l$i$NJ8=q$r6y!9$^$GFI$`$h$&$K$7$F$/$@$5$$!#(B
$BFC$K%P%C%U%!$N%5%$%:$OI,$:(B RAM $B$N%5%$%:$h$jBg$-$/$7$F$/$@$5$$!#(B
$B$5$b$J$$$H%G%#%9%/$G$O$J$/(B RAM $B$N%F%9%H$r$9$k$3$H$K(B
$B$J$C$F$7$^$$!"Hs8=<BE*$K9b$$@-G=$,F@$i$l$F$7$^$$$^$9!#(B
<P>$BHs>o$K4JC1$G$O$"$j$^$9$,!"(B
<CODE>hdparm -tT</CODE> $B$G$b%Y%s%A%^!<%/$r9T$&$3$H$,$G$-$^$9!#(B
$B$3$l$O(B IDE $B$N%I%i%$%V$G$b(B SCSI $B$G$b;H$($^$9!#(B
<P>$B%Y%s%A%^!<%/$d3F<o%W%i%C%H%U%)!<%`$K$*$1$k%=%U%H%&%'%"$K(B
$B4X$9$k$h$jB?$/$N>pJs$O(B
<A HREF="http://www.acnc.com/benchmarks.html">ACNC</A>
$B$N%Y%s%A%^!<%/%Z!<%8$r8+$F$/$@$5$$!#(B
<A HREF="http://spin.ch/~tpo/bench/">$B$3$A$i$N%Z!<%8(B</A>
$B$d(B
<A HREF="http://www.linuxdoc.org/HOWTO/Benchmarking-HOWTO.html">The Benchmarking-HOWTO</A>.
$B$J$I$b$I$&$>!#(B
<P>$B8=:_$G$O(B
<A HREF="http://www.textuality.com/bonnie/">bonnie</A>,
<A HREF="http://www.coker.com.au/bonnie++/">bonnie++</A>,
<A HREF="http://www.iozone.org">iozone</A>
$B$K$O!"$=$l$>$l8x<0%Z!<%8$b$"$j$^$9!#(B
<P>$B;(3X(B: Bonnie $B$O%m!<%+%k$J%\%H%k%M%C%/$NH/8+MQ$N$b$N$G!"(B
$BL>A0$O(B Bonnie Raitt, $B!V%\%H%k%M%C%/$N;H$$J}$rCN$C$F$k$R$H!W(B
$B$K$A$J$s$G$D$1$?!"$HCx<T$O=q$$$F$$$^$9!#(B
($BLuCm(B: Bonnie Raitt $B$O%.%?%j%9%H$G$9(B :-)
<P>
<H2><A NAME="ss3.11">3.11 $BHf3S8!F$(B</A>
</H2>
<P>
<!--
disk!comparisons
-->
SCSI $B$N@-G=$O(B EIDE $B$h$j9b$$$G$9$,!"CMCJ$b9b$/$J$j$^$9!#(B
SCSI $B$G$O%1!<%V%k=*C<$N=hM}$,LLE]$G$9$,!"3HD%$O3Z$G$9!#(B
4 $BBf(B ($B>l9g$K$h$C$F$O(B 2 $BBf(B) $B0J>e$N(B IDE $B%I%i%$%V$r;H$&$N$OBgJQ$G$9$,!"(B
wide SCSI $B$J$i(B 15 $BBf$^$G4JC1$K;H$($^$9!#(B
$BJ#?t$N%A%c%s%M%k$r;}$C$F$$$k(B SCSI $B%[%9%H%"%@%W%?$J$i!"(B
$B$3$NBf?t$O%A%c%s%M%k?t$r>h$8$?$b$N$K$J$j!"$5$i$KB?$/$J$j$^$9!#(B
<P>SCSI $B$G$O!"%[%9%H%"%@%W%?0l$D$K$D$-0l$D$N(B IRQ $B$,I,MW$G!"(B
$B$3$l$G(B 15 $BBf$N%I%i%$%V$r$^$+$J$($^$9!#$3$l$KBP$7$F(B EIDE $B$G$O(B
IRQ $B$,%A%c%s%M%k0l$D(B ($B%G%#%9%/FsBf$^$G$D$J$2$^$9(B) $B$K0l$DI,MW$G!"(B
$B$3$l$O(B conflict $B$N860x$K$J$k$+$b$7$l$^$;$s!#(B
<P>RLL $B$H(B MFM $B$O0lHLE*$K8@$C$F8E$9$.$^$9!#(B
$B$?$$$F$$$NMQES$K$OB.EY!"?.Mj@-$H$bB-$j$J$$$G$7$g$&!#(B
<P>
<P>
<H2><A NAME="ss3.12">3.12 $B>-Mh$N3+H/M=Dj(B</A>
</H2>
<P>
<!--
disk!future development
-->
<P>SCSI-3 $B$b:vDjCf$G!"%j%j!<%9$O6a$=$&$G$9!#(B
$B$h$j9bB.$N%G%P%$%9$K4X$7$F$O$9$G$K%"%J%&%s%9$,$"$j!"(B
$B$4$/:G6a$K$O(B 80 MB/s$B!"(B
$B$5$i$K$O(B 160 MB/s $B$H$$$&%b%s%9%?!<5,3J$bDs0F$5$l!"(B
$B$4$/:G6a$K$O>&IJ$b=P$^$7$?!#(B
$B$3$l$i$O(B 40 MHz $B$N%/%m%C%/$rMQ$$$k(B Ultar-2 $B5,3J$G!"(B
16 $B%S%C%H$N%1!<%V%k$rMQ$$$k$b$N$G$9!#(B
<P>SCSI-3 $BBP1~%G%P%$%9$r%"%J%&%s%9$7$?%a!<%+$b$"$k$h$&$G$9$,!"(B
$BI8=`5,3J$,$^$@$7$C$+$jDj$^$C$F$$$J$$8=:_$G$O!"(B
$B$3$l$O$^$@;~4|>0Aa$H$$$C$?$b$N$G$7$g$&!#(B
$BE>AwB.EY$,>e>:$9$k$K$D$l!"(B
PCI $B%P%9$N%P%s%II}$,$$$C$Q$$$K$J$kF|$b6a$$$+$b$7$l$^$;$s!#(B
$B8=:_$N(B 64 $B%S%C%H%P!<%8%g%s$N(B PCI $B%P%9$N%j%_%C%H$O(B
264 MB/s $B$H$J$C$F$$$^$9!#(B
$B>-Mh(B PCI $B$N%/%m%C%/$O8=:_$N(B 33 MHz $B$+$i(B 66 MHz $B$X>e$,$k$h$&$G!"(B
$B$=$&$9$k$H%j%_%C%H$O(B 528 MB/s $B$H$J$j$^$9!#(B
<P>ATA $B$N3+H/$OB3$$$F$*$j!"(B
$B?7$?$J(B ATA/100 $BI8=`$NEP>l$KH<$C$F@-G=$b8~>e$rB3$1$F$$$^$9!#(B
$B$[$H$s$I$N(B ATA $B%G%P%$%9$G$O!"(B
$B1_HD$+$i$NDj>oE*$JE>AwB.EY$O$3$l$h$jCY$$$N$G!"(B
$B$[$H$s$I$N?M$K$H$C$F$O@-G=8~>e$OBg$-$J$b$N$G$O$"$j$^$;$s!#(B
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<H2><A NAME="recommendations"></A> <A NAME="ss3.13">3.13 $B$*A&$a(B</A>
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$BCMCJ$O$5$i$K3d9b$K$J$k$N$GIaDL$N%f!<%6$K$O$*A&$a$7$^$;$s!#(B
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<A HREF="Multi-Disk-HOWTO-20.html#power-heating">$BEENO$HH/G.(B</A>
$B$N@a$K$"$k>pJs$b;29M$K$7$F$/$@$5$$!#(B
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