From owner-FreeBSD-users-jp@jp.FreeBSD.org Wed Sep 15 10:55:57 2010
Received: (from daemon@localhost)
	by castle.jp.FreeBSD.org (8.11.6p2+3.4W/8.11.3) id o8F1tv507431;
	Wed, 15 Sep 2010 10:55:57 +0900 (JST)
	(envelope-from owner-FreeBSD-users-jp@jp.FreeBSD.org)
Received: from mgkyb1.nw.wakwak.com (mgkyb1.nw.wakwak.com [211.9.230.193])
	by castle.jp.FreeBSD.org (8.11.6p2+3.4W/8.11.3) with ESMTP/inet id o8F1tvG07426
	for <FreeBSD-users-jp@jp.FreeBSD.org>; Wed, 15 Sep 2010 10:55:57 +0900 (JST)
	(envelope-from hashiya@at.wakwak.com)
Received: from vckyb1.nw.wakwak.com (vckyb1.nw.wakwak.com [211.9.230.144])
	by mgkyb1.nw.wakwak.com (8.14.3/8.14.3/2010-03-11) with SMTP id o8F1tngl081525
	for <FreeBSD-users-jp@jp.FreeBSD.org>; Wed, 15 Sep 2010 10:55:51 +0900 (JST)
	(envelope-from hashiya@at.wakwak.com)
Received: from at.wakwak.com (at.wakwak.com [211.9.230.135])
	by vckyb1.nw.wakwak.com (Postfix) with ESMTP id E98183D0033
	for <FreeBSD-users-jp@jp.FreeBSD.org>; Wed, 15 Sep 2010 10:55:48 +0900 (JST)
Received: from mail.interrupt.gr.jp (ns.interrupt.gr.jp [202.171.147.43])
	(user=hashiya@at.wakwak.com mech=DIGEST-MD5)
	by at.wakwak.com (8.14.3/8.14.3/2010-08-16) with ESMTP/inet id o8F1tm7Z071539
	for <FreeBSD-users-jp@jp.FreeBSD.org>; Wed, 15 Sep 2010 10:55:48 +0900 (JST)
	(envelope-from hashiya@at.wakwak.com)
Received: from localhost (localhost [127.0.0.1])
	by mail.interrupt.gr.jp (Postfix) with ESMTP id A1BF5B823
	for <FreeBSD-users-jp@jp.FreeBSD.org>; Wed, 15 Sep 2010 10:55:48 +0900 (JST)
Message-Id: <20100915.105548.71175901.hashiya@at.wakwak.com>
To: FreeBSD-users-jp@jp.FreeBSD.org
From: HASHIYA Takamitsu <hashiya@at.wakwak.com>
In-Reply-To: <AANLkTim+KMJXPMXNyB=BrgpfNnsM7pxAJ4szhskNL88U@mail.gmail.com>
References: <20100914.230438.133754748.hrs@allbsd.org>
	<20100915083414.0DE4.F7F21E74@kens.fm>
	<AANLkTim+KMJXPMXNyB=BrgpfNnsM7pxAJ4szhskNL88U@mail.gmail.com>
X-Mailer: Mew version 6.3 on Emacs 23.2 / Mule 6.0 (HANACHIRUSATO)
Mime-Version: 1.0
Content-Type: Text/Plain; charset=iso-2022-jp
Content-Transfer-Encoding: 7bit
Reply-To: FreeBSD-users-jp@jp.FreeBSD.org
Precedence: list
Date: Wed, 15 Sep 2010 10:55:48 +0900
X-Sequence: FreeBSD-users-jp 93206
Subject: [FreeBSD-users-jp 93206] Re: dd =?ISO-2022-JP?B?GyRCJCwbKEI=?=
 =?ISO-2022-JP?B?GyRCQ1kkJBsoQg==?= 
Sender: owner-FreeBSD-users-jp@jp.FreeBSD.org
X-Originator: hashiya@at.wakwak.com
X-Distribute: distribute version 2.1 (Alpha) patchlevel 24e+060209

$B66C+$H?=$7$^$9!#(B

$B$A$g$C$H5$$K$J$C$?$N$G!"$$$/$D$+%F%9%H$7$F$_$^$7$?!#(B
/dev/hdb$B$O%^%&%s%H$J$I$7$F$$$J$$!V$D$J$,$C$F$$$k$@$1!W$N(BHDD$B$G$9!#(B
$B$A$g$C$H8+$K$/$$$G$9$,(B...

# uname -a
Linux vdebian 2.6.18-6-686 #1 SMP Thu Nov 5 16:28:13 UTC 2009 i686 GNU/Linux
# vmstat -d | egrep '^(disk|    |hdb)'
disk- ------------reads------------ ------------writes----------- -----IO------
       total merged sectors      ms  total merged sectors      ms    cur    sec
hdb       43     17     473       4      0      0       0       0      0      0
disk- ------------reads------------ ------------writes----------- -----IO------
       total merged sectors      ms  total merged sectors      ms    cur    sec
# dd if=/dev/hdb ibs=512 count=1 of=/dev/null
1+0 records in
1+0 records out
512 bytes (512 B) copied, 0.000149291 seconds, 3.4 MB/s
# vmstat -d | egrep '^(disk|    |hdb)'
disk- ------------reads------------ ------------writes----------- -----IO------
       total merged sectors      ms  total merged sectors      ms    cur    sec
hdb       44     20     505       4      0      0       0       0      0      0
disk- ------------reads------------ ------------writes----------- -----IO------
       total merged sectors      ms  total merged sectors      ms    cur    sec

sectors$B$r8+$k$HJ,$+$k$h$&$K!"(B1$B%;%/%?;XDj$N(Bdd$B$G$b<B:]$K$O(B32$B%;%/%?FI$^$l$F$$$^(B
$B$9$M!"$d$O$j@hFI$_$,F/$$$F$$$k$h$&$G$9!#$3$l$KBP$7$F(B

# dd if=/dev/hdb ibs=512 iflag=direct count=1 of=/dev/null
1+0 records in
1+0 records out
512 bytes (512 B) copied, 0.000153211 seconds, 3.3 MB/s
# vmstat -d | egrep '^(disk|    |hdb)'
disk- ------------reads------------ ------------writes----------- -----IO------
       total merged sectors      ms  total merged sectors      ms    cur    sec
hdb       45     20     506       4      0      0       0       0      0      0
disk- ------------reads------------ ------------writes----------- -----IO------
       total merged sectors      ms  total merged sectors      ms    cur    sec

direct$B%U%i%0$D$-$@$H!V@5$7$/!W(B1$B%;%/%?FI$^$l$F$$$k$h$&$G$9!#(B
$BB?J,$3$N>l9g$O(BFreeBSD$B$HBg:9$J$$B.EY$NE>Aw$K$J$k$N$G$O$J$$$+$H;W$$$^$9!#(B

# VirtualBox$B$O$3$N$h$&$J%F%9%H$r<j7Z$K$G$-$F$h$$$G$9$M!#(B
