From owner-freebsd-current Mon Dec 10 2: 5: 5 2001 Delivered-To: freebsd-current@freebsd.org Received: from hawk.prod.itd.earthlink.net (hawk.mail.pas.earthlink.net [207.217.120.22]) by hub.freebsd.org (Postfix) with ESMTP id 4F90037B416 for ; Mon, 10 Dec 2001 02:04:58 -0800 (PST) Received: from pool0043.cvx40-bradley.dialup.earthlink.net ([216.244.42.43] helo=mindspring.com) by hawk.prod.itd.earthlink.net with esmtp (Exim 3.33 #1) id 16DNIt-0005Pi-00; Mon, 10 Dec 2001 02:04:56 -0800 Message-ID: <3C1488CF.410BE633@mindspring.com> Date: Mon, 10 Dec 2001 02:05:03 -0800 From: Terry Lambert X-Mailer: Mozilla 4.7 [en]C-CCK-MCD {Sony} (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Joerg Wunsch Cc: freebsd-current@FreeBSD.ORG Subject: Re: cvs commit: src/sys/kern subr_diskmbr.c References: <20011209102129.F97235@uriah.heep.sax.de> <20011210004350.6703C3810@overcee.netplex.com.au> <200112092200.fB9M0J660085@uriah.heep.sax.de> <20011210005928.9538A3810@overcee.netplex.com.au> <20011210091103.M97235@uriah.heep.sax.de> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Ah, the thread which would not die... 8^). Joerg Wunsch wrote: > /The/ major advantage of DD mode was that all BIOSes (so far :) at > least agree on how to access block 0 and the adjacent blocks, so > starting our own system there makes those disks portable. I guarantee you that there are a number of controllers which have different ideas of how to do soft sector sparing _at the controller level_ rather than at the drive level. Disks created with such controllers aren't portable, since they depend on controller state information, which may not be valid from controller to controller, depending on the controller settings (I killed a disk by not having the WD1007 soft sector sparing jumper set the same in the machine I put it in as in the machine I took it out of... 8^)). > I've read this, and yes, i never argued about fixing /that/. Since > those values chosen by our grandfather Bill Jolitz have been just > `magic' numbers only, it's unfortunate they eventually turned out to > be such bad magic about a decade later. Yeah, we should pick new magic. It's bound to die again in the future, though, once "what's magic" changes out from under us again... 8^(. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message