From owner-freebsd-hackers Sun Feb 18 1:33:22 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from post.mail.nl.demon.net (post-11.mail.nl.demon.net [194.159.73.21]) by hub.freebsd.org (Postfix) with ESMTP id 1307A37B401; Sun, 18 Feb 2001 01:33:19 -0800 (PST) Received: from [212.238.54.101] (helo=freebie.demon.nl) by post.mail.nl.demon.net with smtp (Exim 3.14 #4) id 14UQDV-000Bll-00; Sun, 18 Feb 2001 09:33:17 +0000 Received: (from wkb@localhost) by freebie.demon.nl (8.11.1/8.11.1) id f1I9YFf04456; Sun, 18 Feb 2001 10:34:15 +0100 (CET) (envelope-from wkb) Date: Sun, 18 Feb 2001 10:34:15 +0100 From: Wilko Bulte To: Warner Losh Cc: Luigi Rizzo , keichii@peorth.iteration.net, FreeBSD-hackers@FreeBSD.ORG, sos@FreeBSD.ORG Subject: Re: hotplug ata device? Message-ID: <20010218103415.B4042@freebie.demon.nl> References: <200102180220.f1I2KKR21592@iguana.aciri.org> <200102180224.f1I2O6W93349@harmony.village.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: <200102180224.f1I2O6W93349@harmony.village.org>; from imp@harmony.village.org on Sat, Feb 17, 2001 at 07:24:06PM -0700 X-OS: FreeBSD 4.2-STABLE X-PGP: finger wilko@freebsd.org Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sat, Feb 17, 2001 at 07:24:06PM -0700, Warner Losh wrote: > In message <200102180220.f1I2KKR21592@iguana.aciri.org> Luigi Rizzo writes: > : i actually wonder, aren't there removable disk frames which support > : hot swap (by turning off power with the keylock, or the like) ? > > I've not seen any, but I suppose they exist. The TAPR ones, however, > definitely are not those beasts. they are simple and don't support > hotswap. > > : Plus, it is actually curious that you can fry the IDE controller, > : the simplest ones used to be just a couple of '245 and an > : address decoder... > > I think that the main problem is lack of good grounding causing large > transients when the card is removed. But I could be wrong about > that. Each time I fried one it was definitely a remove + insert > sequence. Thanks for all the input :-) I will stop my hot-swap experiments here and now. To think that a few stupid TTL buffer chips would have made it possible to hotswap :-( W/ -- | / o / / _ Arnhem, The Netherlands email: wilko@freebsd.org |/|/ / / /( (_) Bulte http://www.freebsd.org http://www.nlfug.nl To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message