From: "L P" <plm@iname.com>
To: "Daniela Engert" <dani@ngrt.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Problems Hot-Swapping IDE ATA drives
Date: Thu, 21 Nov 2002 18:34:37 +0800 [thread overview]
Message-ID: <20021121103437.50614.qmail@iname.com> (raw)
Dear Daniela,
> There is a problem with PCMCIA<->ATA adapters and "True IDE mode":
>
> A CompactFlash unit enters "True IDE mode" when the /OE pin is held low
> at device power on. This is fine when your system is powered on with
> the CF card inserted. But if you insert a CF card into an already
> powered on system, the /OE pin is not connected to the socket and thus
> held high by an device-internal pull up at device power on. This is
> because the power pins are longer than the other pins and connected
> before the others! So the CF card enters "memory mapped mode" instead
> of "True ATA mode" and is no longer accessible from the ATA host.
Many many thanks to you for the hint - I added the On/Off switch on the adapter power and everything now works fine! I insert cassette, cycle the power and mount the drive - it works!
Once again - many thanks.
--
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next reply other threads:[~2002-11-21 10:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-21 10:34 L P [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-11-18 12:46 L P
2002-11-18 13:39 ` Alan Cox
2002-11-18 13:44 ` Daniela Engert
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