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Date:      Sat, 17 Mar 2001 17:35:15 +0100 (CET)
From:      Soren Schmidt <sos@freebsd.dk>
To:        doconnor@gsoft.com.au (Daniel O'Connor)
Cc:        des@ofug.org (Dag-Erling Smorgrav), jhb@FreeBSD.org (John Baldwin), luigi@info.iet.unipi.it (Luigi Rizzo), sos@FreeBSD.org ([S_ren Schmidt]), cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org, joe@tao.org.uk (Josef Karthauser)
Subject:   Re: cvs commit: src/sys/dev/ata ata-all.c ata-all.h ata-disk.c a
Message-ID:  <200103171635.RAA38320@freebsd.dk>
In-Reply-To: <XFMail.010318020854.doconnor@gsoft.com.au> from "Daniel O'Connor" at "Mar 18, 2001 02:08:54 am"

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It seems Daniel O'Connor wrote:
> 
> On 17-Mar-01 Dag-Erling Smorgrav wrote:
> >  "Daniel O'Connor" <doconnor@gsoft.com.au> writes:
> > > Hmm.. are you talking laptop hardware here, or 'conventional' stuff?
> >  Conventional stuff, but I really don't think it makes a difference.
> 
> Hmmm I was under the impression that it wasn't suitable/buffered whatever :)

Well, its not "recommended" officially, but if you use drawers that can
cut power to the drive, and have the channel inactive when you do it
(which is exactly what atacontrol can do), you should be safe, at least
I've been swapping drives for close to 2 years now using this, and I've
never had anything go bad. A fair amount of warining is in place though
it _can_ cause problems, I'm not in any way making any garanties :)

However some controller chips can tristate all outputs, and those
should be safe for hotswapping, modulo eventual static charge 
problems...

-Søren

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