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Date:      Sat, 17 Feb 2001 19:24:06 -0700
From:      Warner Losh <imp@harmony.village.org>
To:        Luigi Rizzo <rizzo@aciri.org>
Cc:        keichii@peorth.iteration.net, wkb@freebie.demon.nl, FreeBSD-hackers@FreeBSD.ORG, sos@FreeBSD.ORG
Subject:   Re: hotplug ata device? 
Message-ID:  <200102180224.f1I2O6W93349@harmony.village.org>
In-Reply-To: Your message of "Sat, 17 Feb 2001 18:20:20 PST." <200102180220.f1I2KKR21592@iguana.aciri.org> 
References:  <200102180220.f1I2KKR21592@iguana.aciri.org>  

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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.

Warner


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