From owner-FreeBSD-users-jp@jp.freebsd.org  Thu May 14 16:49:29 1998
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To: FreeBSD-users-jp@jp.freebsd.org
From: TANIYAMA Hideki <yoko@sunny.co.jp>
In-Reply-To: Your message of "Thu, 14 May 1998 16:16:44 +0900 (JST)"
References: <199805140716.QAA14068@serv1.hq.imagica.co.jp>
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Date: Thu, 14 May 1998 16:49:25 +0900
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Subject: [FreeBSD-users-jp 28223] Burst transfer performance of ccd (was: Re: filesystem maximum size)
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$BC+;3$G$9!#(B

$BOC$,%U%!%$%k(B/$B%U%!%$%k%7%9%F%`$N:GBg%5%$%:$+$i0o$l$k$N$G(BSubject$BJQ$($^$7$?!#(B

>>>> On Thu, 14 May 1998 16:16:44 +0900 (JST),
>>>> 	Minoru Oikawa <mino@bb.imagica.co.jp> wrote:

mino> # dd if=/dev/zero of=zero bs=1m count=4800
mino> 4800+0 records in
mino> 4800+0 records out
mino> 5033164800 bytes transferred in 460.236631 secs (10936037 bytes/sec)

mino>  $B$3$l!"B.$$$+$JCY$$$+$J!#(B

$B0JA0!"$3$N(BML$B$K$bF1MM$N>pJs$rN.$7$?5-21$b$"$k$s$G$9$,!"$4;29M$^$G$K!#@N!"(B
$B<c5$$N;j$j(B:)$B$G7W$C$F$_$?$b$N$G$9!#(B

$BB,Dj$K$O(Biozone$B$r;H$$!"(B1GB$B$N(Bburst read/ write$B$r7W$C$?$b$N$G$9!#(B

 Asus SC-875 + DCAS32160W
           Write 6.3MB/s Read 7.6MB/s

 Adaptec AAA-133 + DCAS32160W
           Write 6.3MB/s Read 7.6MB/s

 Asus SC-875 + Adaptec AAA-133 + DCAS32160W x 7 ccd (UltraWIDE x 4ch)
 Interleave
 4           Write 11.9MB/s Read 13.5MB/s
 8           Write 19.4MB/s Read 25.1MB/s
 16          Write 22.2MB/s Read 34.6MB/s
 32          Write 23.3MB/s Read 37.1MB/s
 64          Write 23.9MB/s Read 39.3MB/s
 128         Write 23.7MB/s Read 36.6MB/s
 256         Write 23.6MB/s Read 21.1MB/s

$B!A!A!A!A!A!A!A!A!A!A!A!A!A!A!A!A!A!A!A(B  $BC+;3(B $B=(<y(B yoko@sunny.co.jp
  $B$h$3$J$_(B $B$h$3$J$_(B $B$h$3$J$_(B $B$h$3$J$_(B   $B3t<02q<R(B $B%5%K!<%=%U%H(B
