From owner-FreeBSD-users-jp@jp.freebsd.org  Wed Dec 24 16:08:44 1997
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References: <199712240559.FAA00681@ryo1123.aist-nara.ac.jp>
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Message-Id: <19971224160842J.simokawa@sat.t.u-tokyo.ac.jp>
Date: Wed, 24 Dec 1997 16:08:42 +0900
From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp>
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Subject: [FreeBSD-users-jp 22752] Re: Expmt. Concatinated Disk driver.
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$B2<@n!wElBg$G$9(B.

$B;d$b(B, 1$BG/$0$i$$$^$($K(B2Gx8$B$0$i$$$N(BCCD$B$G$$$m$$$mM7$s$G$_$?$0$i$$(B
$B$G(B, $B$7$C$+$jDjNLE*$KD4$Y$?$o$1$G$O$"$j$^$;$s$,(B.

takuya-k>   $B0lEY$N!"%?%$%`%9%m%C%H$G$N=q$-9~$_$,(B 512KB $B0J2<$G$"$l$P:G(B
takuya-k> $BBg(B 40MB/sec $B$G(B HDD $B$N%-%c%C%7%e$K=q$+$l$F!"<!$N%?%$%`%9%m%C(B
takuya-k> $B%H$^$G$K%-%c%C%7%e$NFbMF$r(B 8MB/sec $B$G(B DISK $B$K=q$-9~$_@Z$l$l(B
takuya-k> $B$P!"3N$+$KA4BN$G(B40MB/sec $B=P$k$H$O;W$$$^$9!#$O$?$7$F!"$=$s$J(B
takuya-k> $BET9g$NNI$$F0:n$r$9$k$b$N$G$7$g$&$+(B?

$B$b$A$m$s$7$J$$$G$7$g$&$,(B, 

takuya-k>   $B$b$7!"$3$&$$$&M}6~$G$"$l$P!"(BHDD $B$O$G$-$k$@$1BgMFNL$N%-%c%C(B
takuya-k> $B%7%e$rEk:\$7$F$$$F!"$7$+$b!"%7!<%/$J$I$N%*!<%P!<%X%C%I$N>.$5(B
takuya-k> $B$$!"9b@-G=$J$b$N$r;HMQ$7$J$1$l$P$J$i$J$$$h$&$K;W$($^$9!#(B

$B$H$7$F$b(B, $BBgNL$N(Bsequential$B$J(Bread/write$B$G$O(B($B7`E*$J(B)$B8z2L$O$J$$$N(B
$B$G$O$H;W$$$^$9(B.

$B$R$g$C$H$7$?$i@$$NCf$K$O$9$4$$(BRAID controll$B$,$"$k$N$+$b$7$l$^$;$s(B
$B$,(B, $B$h$/$"$k0B$$$d$D(BRAID controller$B$O(B486DX base$B$@$C$?$j$7$F(B, $B$G$b(B
UltraWide 40MB/s$B$@$h$C$F9-9p$K=q$$$F$"$j$^$9$,(B, $BC1BN$N(Bdisk$B$h$jCY(B
$B$$$H$$$&1=$b$"$j$^$9(B. PCI$B$i$7$$$G$9$,(B, $BC1=c$KF~NO(B40MB/s, $B=PNO(B
40MB/s$B$@$H$7$F$b(Bbus$B$K$O(B80MB/s$BN.$l$k$o$1$G$9$7(B, $B8x>N(B133MB/s$B$H$$$C$F$b(B
$B$[$s$H$K$=$l$@$1N.$l$k$N$G$7$g$&$+(B. ($BNc$((Bpentium class$B$r;H$C$F$$(B
$B$F$b7k9=$-$D$$$N$G$O$H;W$$$^$9(B.)

80MB/s$B6a$/$N(Bflow$B$r(Bkeep$B$G$-$k(Bcontroller$B$C$F$H$F$b$9$4$$(B
$B$/$F9b$$$N$G$O$J$$$N$+$J$H;W$$$^$9(B. ($B$D$$$G$K(Bparity$B$^$G7W;;$7$?$j(B)

$B!t(BFreeBSD$B$N(Bccd$B$O(BRAID5$B$O$G$-$J$$$1$I(B, $B$=$&$$$&0UL#$G$OB.$$$7(B
$B!t0B$$$70BDj$7$F$$$k$N$G(B, $B$J$+$J$+(Breplace$B$9$k(BRAID$B$N8uJd$,8+$D$+$i(B
$B!t$J$$(B.... 

takuya-k> $B%P%9$NK\?t$r2T$0$H$$$&0UL#$G!"(BIDE $B$G$b0l$D$N%P%9$K(B 2 $B8D$N(B 
takuya-k> HDD $B$r%^%9%?!?%9%l!<%V$G$D$J$0$N$H!"%W%i%$%^%j!?%;%+%s%@%j$N(B
takuya-k> $B%^%9%?$G$D$J$0$N$H$G!"@-G=$K:9$,$"$k$N$G$O$J$$$G$7$g$&$+(B?

IDE$B$O$"$^$j;H$C$?$3$H$O$J$$$N$G$h$/$o$+$j$^$;$s$,(B,
10MB/s$B$N;~Be$G$"$l$P(B, BUS$B$rA}$9$3$H$K$h$C$F7`E*$J8z2L$,F@$i$l$?$+(B
$B$b$7$l$^$;$s$,(B, $B$$$^$O$=$l$[$I$N8fMx1W$O$J$5$=$&$J5$$,$7$F$$$^$9(B.

UltraSCSI$B$NFqE@$O(B, cable$B$,1d$;$J$$$3$H$G(B, disk$B$rA}$7$F(Brandom
access$B$rB.$/$7$h$&$H$+;W$&$H(B, bus$B$rA}$5$J$$$H$^$:$$(B
$B$H$$$&$N$O$"$k$+$b$7$l$^$;$s(B.

$B!t(BUltraWide$B$G(B10$BBf0J>e7Q$$$G$$$k?M$$$^$9$+(B?

/\ Hidetoshi Shimokawa
\/  simokawa@sat.t.u-tokyo.ac.jp
PGP public key: finger -l simokawa@sat.t.u-tokyo.ac.jp
