*BSD News Article 25682


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Newsgroups: comp.os.386bsd.bugs
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From: michaelv@iastate.edu (Michael L. VanLoon)
Subject: Re: [NetBSD 0.9] patch to wd.c for IDE controller weirdnesses
Message-ID: <michaelv.757905077@ponderous.cc.iastate.edu>
Sender: news@news.iastate.edu (USENET News System)
Organization: Iowa State University, Ames IA
References: <Eh=5wnW00WB5ETqoEi@andrew.cmu.edu>
Date: Fri, 7 Jan 1994 01:11:17 GMT
Lines: 35

In <Eh=5wnW00WB5ETqoEi@andrew.cmu.edu> "Alex R.N. Wetmore" <aw2t+@andrew.cmu.edu> writes:

>Excerpts from netnews.comp.os.386bsd.bugs: 6-Jan-94 Re: [NetBSD 0.9]
>patch to w.. by Michael L. VanLoon@iastate.edu 

>> Once again, this is *NOT* a problem except in certain circumstances.
>> I too have been running my machine like this for months (normal fsck
>> with two IDE drives).  I've never had a problem.  It *does* work.

>same here, running with two IDE's (one samsung 120mb, one wd 250mb).  
>however...

>> It seems that it only works if you have swap on both drives, however,
>> and I've always had swap on both drives.  The problem isn't with fsck,
>> but rather, it's probably one of the (many) hard to find bugs in the
>> wd driver.

>I recently reconfigured to only have swap on drive (I didn't need all of the
>swap I had setup, because I upgraded to more memory).  I still haven't seen
>any problems.  I don't use dos partitioning on either drive though (my
>machine is all netbsd 0.9).

This is fine, but you do realize that spreading your swap over two
drives will make it faster, I assume?  Most modern Unixes interleave
swap accesses over all the available swap devices to increase
performance.  So, if you only need 20meg of swap instead of 40meg,
you're going to get better swap performance by reducing each 20meg
partition to 10meg rather than just removing one and leaving one.
But, every application is different -- to each his/her own...

-- 
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  Michael L. VanLoon                           Project Vincent Systems Staff
  michaelv@iastate.edu              Iowa State University Computation Center
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