From owner-freebsd-hackers Tue Mar 3 13:10:01 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id NAA05256 for freebsd-hackers-outgoing; Tue, 3 Mar 1998 13:10:01 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from sendero.simon-shapiro.org (sendero-fxp0.Simon-Shapiro.ORG [206.190.148.34]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id NAA05048 for ; Tue, 3 Mar 1998 13:09:19 -0800 (PST) (envelope-from shimon@sendero-fxp0.simon-shapiro.org) Received: (qmail 16642 invoked by uid 1000); 3 Mar 1998 21:16:19 -0000 Message-ID: X-Mailer: XFMail 1.3-alpha-021598 [p0] on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <34FC66A3.2781E494@whistle.com> Date: Tue, 03 Mar 1998 13:16:19 -0800 (PST) Reply-To: shimon@simon-shapiro.org Organization: The Simon Shapiro Foundation From: Simon Shapiro To: Julian Elischer Subject: Re: SCSI Bus redundancy... Cc: hackers@FreeBSD.ORG Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 03-Mar-98 Julian Elischer wrote: ... > spindle inertia is no longer used for power. Probably saves them all of $3.00/drive. > I quote from the Qantum fireball programmer's manual.. > > "You may apply the power in any order, or open either the power or > return line with no loss of data or damage to the disk drive. However, > data may be lost in the sector being written at the time of power > loss." > > Other drives have similar stories to tell. > > We queried the manufacturers closely on this > and they confirmed that they cease all operation IMMEDIATLY on > recognition of power loss. That means that the drive's cache is useless at best. Alternatively, my HA work is that much more valuable (coupled with a good UPS). ---------- Sincerely Yours, Simon Shapiro Shimon@Simon-Shapiro.ORG Voice: 503.799.2313 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message