From owner-FreeBSD-users-jp@jp.freebsd.org  Sun May 20 07:29:00 2001
Received: (from daemon@localhost)
	by castle.jp.freebsd.org (8.9.3+3.2W/8.7.3) id HAA95289;
	Sun, 20 May 2001 07:29:00 +0900 (JST)
	(envelope-from owner-FreeBSD-users-jp@jp.FreeBSD.org)
Received: from m08.alpha-net.ne.jp (m08.alpha-net.ne.jp [210.229.64.38])
	by castle.jp.freebsd.org (8.9.3+3.2W/8.7.3) with ESMTP id HAA95284
	for <FreeBSD-users-jp@jp.freebsd.org>; Sun, 20 May 2001 07:29:00 +0900 (JST)
	(envelope-from sf@FreeBSD.org)
Received: from kyoto-tc011-p139.alpha-net.ne.jp (kyoto-tc011-p139.alpha-net.ne.jp [210.237.118.141])
	by m08.alpha-net.ne.jp (8.9.3/3.7W) with ESMTP id HAA25721
	for <FreeBSD-users-jp@jp.freebsd.org>; Sun, 20 May 2001 07:28:54 +0900 (JST)
Received: from souffle.bogus-local.net (localhost.bogus-local.net [127.0.0.1])
	by kyoto-tc011-p139.alpha-net.ne.jp (Postfix) with ESMTP id 0A7C69B22
	for <FreeBSD-users-jp@jp.freebsd.org>; Sun, 20 May 2001 07:28:52 +0900 (JST)
Date: Sun, 20 May 2001 07:28:52 +0900
Message-ID: <867kzd55y3.wl@cheerful.com>
From: FUJISHIMA Satsuki <sf@FreeBSD.org>
To: FreeBSD-users-jp@jp.freebsd.org
In-Reply-To: <20010519200818D.hino@nwk.cl.nec.co.jp>
References: <86bsoq66wr.wl@cheerful.com>
	<20010519200818D.hino@nwk.cl.nec.co.jp>
User-Agent: Wanderlust/2.5.8 (Smooth) SEMI/1.14.3 (Ushinoya) FLIM/1.14.2 (Yagi-Nishiguchi) APEL/10.3 Emacs/20.7 (i386--freebsd) MULE/4.1 (AOI)
MIME-Version: 1.0 (generated by SEMI 1.14.3 - "Ushinoya")
Content-Type: text/plain; charset=ISO-2022-JP
Reply-To: FreeBSD-users-jp@jp.freebsd.org
Precedence: list
X-Distribute: distribute version 2.1 (Alpha) patchlevel 24e+010328
X-Sequence: FreeBSD-users-jp 61630
Subject: [FreeBSD-users-jp 61630] Re: too slow ata (Re: SOHO PC-RAID10)
Errors-To: owner-FreeBSD-users-jp@jp.freebsd.org
Sender: owner-FreeBSD-users-jp@jp.freebsd.org
X-Originator: sf@FreeBSD.org

IBM DPTA$B$N>l9g$N>\:Y$r$_$D$1$^$7$?!%(B

http://www.storage.ibm.com/techsup/hddtech/prodspec/dpta_spw.pdf
4.0 Data Integrity
 4.1 Data loss at Power Off
  The drive retains recorded data under all non-write operation. No
more than one sector can be lost by power down during write operation
while write cache is disa-bled. Power off during write operation may
make an incomplete sector which will report hard data error when
read. The sector can be recovered by a re-write operation. Hard reset
does not cause any data loss. 4.2 Write Cache Power off while write
cache is enabled may cause loss of data which are remaining in the
cache and have not been flushed onto the disk media. This means that
there is a possibility that power off even after write command
completion may cause loss of data. There are two ways to check if all
data in the write cache have been flushed onto the disk. Checking just
before power off is recommended to prevent data loss. - To confirm
successful completion of Software Reset. - To confirm successful
completion of Flush Cache command.

$BEE8;$,@Z$l$?$i0l7b$G>:E7!$$H$$$&$3$H$G$9$M!%%9%C%-%j$7$^$7$?!%(B

-- 
FUJISHIMA Satsuki
