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To: FreeBSD-users-jp@jp.freebsd.org
In-reply-to: Your message of "Wed, 24 Dec 1997 14:00:32 JST."
             <19971224140032A.simokawa@sat.t.u-tokyo.ac.jp> 
Date: Wed, 24 Dec 1997 14:59:12 +0900
From: Takuya Koumoto <takuya-k@is.aist-nara.ac.jp>
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Subject: [FreeBSD-users-jp 22741] Re: Expmt. Concatinated Disk driver. 
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$B9CK\$G$9!#(B

> $B2<@n!wElBg$G$9(B.
> 
> 40MB/sec$B6a$/$@$9$?$a$K$O(B, $BIaDL$O(BRAID controller$B$,(Bbottle neck$B$K$J$k$h(B
> $B$&$J5$$,$7$^$9(B. $B$=$l$@$1$G$k(Bcontroller$B$,$"$l$P@'HsCN$j$?$$$G$9(B.

$B9b@-G=$J(B RAID $B%3%s%H%m!<%i$@$H$7$F!"(B

  $B<g5-21(B <- PCI -> SCSI $B%3%s%H%m!<%i(B: 133MB/sec
  SCSI $B%3%s%H%m!<%i(B <- UltraWideSCSI -> RAID $B%3%s%H%m!<%i(B: 40MB/sec

$B$H$$$&$N$O$^$"NI$$$N$G$9!#$3$3$G!"BgNL$N%P!<%9%H=q$-9~$_$,H/(B
$B@8$9$k$H!":GBg(B 40MB/sec $B$G(B RAID $B%3%s%H%m!<%i$K%G!<%?$,N.$l9~(B
$B$`$H$7$^$9$M!#(B
  $B:GBgF14|E>Aw(B 8MB/sec $B$G%-%c%C%7%e(B 512KB $B$J(B HDD 5 $B8D$G(B RAID 
$B$r9=@.$9$k>l9g!"8D!9$N(B HDD $B$KBP$7$F$O<B:]$K$O$I$&$$$&=q$-9~(B
$B$_$,$5$l$k$N$G$7$g$&(B?

  RAID $B%3%s%H%m!<%i(B <- UltraWideSCSI -> HDD: 40MB/sec

$B$H$7$F!"%P%9$O6&M-$7$F$$$k$o$1$G$9$+$i!"8D!9$N(B HDD $B$O%?%$%`(B
$B%9%m%C%H$4$H$K(B RAID $B%3%s%H%m!<%i$HDL?.$7$^$9$h$M(B?
  $B0lEY$N!"%?%$%`%9%m%C%H$G$N=q$-9~$_$,(B 512KB $B0J2<$G$"$l$P:G(B
$BBg(B 40MB/sec $B$G(B HDD $B$N%-%c%C%7%e$K=q$+$l$F!"<!$N%?%$%`%9%m%C(B
$B%H$^$G$K%-%c%C%7%e$NFbMF$r(B 8MB/sec $B$G(B DISK $B$K=q$-9~$_@Z$l$l(B
$B$P!"3N$+$KA4BN$G(B40MB/sec $B=P$k$H$O;W$$$^$9!#$O$?$7$F!"$=$s$J(B
$BET9g$NNI$$F0:n$r$9$k$b$N$G$7$g$&$+(B?
  $B$b$7!"$3$&$$$&M}6~$G$"$l$P!"(BHDD $B$O$G$-$k$@$1BgMFNL$N%-%c%C(B
$B%7%e$rEk:\$7$F$$$F!"$7$+$b!"%7!<%/$J$I$N%*!<%P!<%X%C%I$N>.$5(B
$B$$!"9b@-G=$J$b$N$r;HMQ$7$J$1$l$P$J$i$J$$$h$&$K;W$($^$9!#(B

> $B$?$7$+(Bccd(striping$B$N$_(B)$B$G$b(B20MB/s$BDxEY$7$+=P$J$$$N$G$O$J$$$G$7$g(B
> $B$&$+(B? $B$3$l$O(Bmemory$B$N(Bbandwidth$B$NLdBj$@$H$$$&OC$rJ9$$$?$3$H$,$"$j$^(B
> $B$9(B.
> 
> $B!t(Bpc$B$@$H:#$d(BSCSI bus$B0lK\$U$d$9$N$b$?$$$7$F(Bcost$B$+$+$i$J$$$G$9$M(B.
> $B!t(BPCI slot$B$,B-$j$J$$$H$$$&$3$H$O$"$C$F$b(B.

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