From owner-freebsd-stable  Thu Sep 20 14: 2: 5 2001
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From: Mike Harding <mvh@ix.netcom.com>
To: nuno.mailinglists@pt-quorum.com
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In-reply-to: <20010920211704.C7820@gateway.bogus> (message from Nuno Teixeira
	on Thu, 20 Sep 2001 21:17:04 +0100)
Subject: Re: hw.ata.wc && hw.ata.tags && softupdates short question
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Date: Thu, 20 Sep 2001 14:00:10 -0700 (PDT)
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When I enabled tags I got lots of silo overflow errors, so I think
that the interrupt processing is not ideal when this option is
enabled.

- Mike H.

   Date: Thu, 20 Sep 2001 21:17:04 +0100
   From: Nuno Teixeira <nuno.mailinglists@pt-quorum.com>
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   Hello to all,


   I have searched for the experimental hw.ata.tags that work on IDE IBM DTLA and 
   DPLA disks.

   For what I heard, I concluded that we shouldn't use softupdates with write 
   cache turned on. The first time that I tried this I loose a lot of work
   due to a power failure.

   Since then I'm using softupdates with hw.ata.wc="0".

   Since I have a IBM DTLA disk that supports hw.ata.tags, I want to make the 
   following questions:


   1. Can I use softupdates with hw.ata.wc="1" and hw.ata.tags="1" safely?

   2. Does hw.ata.tags="1" "allows write caching to be safely turned on really?




   Thanks very much,




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