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Article #191

Re: Cacheing Hard Disk Controllers

#191
From: Needham / Tate Stewart (ISE)
Date: Thu, 10 Aug 1995 00:00
29 lines
2191 bytes
>>I wonder if this ZERO chance is actually true, as far as I understand it,
>>sone of the caching controllers have pretty elaborate caching schemes
>>implemented on an onboard CPU, I suppose you assume that they only
>>implement a 'most recently accessed' caching scheme wich would justify
>>your ZERO change statement.
>>Any comments whether this is true, and perhaps any numbers to show how
>>efficient a disk controller cache is during 'normal' linux work???
>
>The point is if you're going to pay for memory, give the operating system
>the chance to use it in a flexible way, depending on its workload.
>Linux will use it intelligently.
>People who buy cached disk controllers and get all excited about the
>disk bench mark test don't seem to realise that all this exciting
>I/O is pointless when the extra memory may have avoided the need for
>an I/O in the first place, eg swapping................

I bought a cache controller....  the reason was that i upgraded my RAM to 
20MB and i had 4MB left over... so instead of sitting it on the shelf i 
put it in a cache controller.  I allocate a software cache of about 64k 
or so.

.t

*******************************************************
      " Where you should be Today - OS/2 Warp"

Tate Needham    - u933692@student.canberra.edu.au
                -    spud@acslink.net.au
*******************************************************
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From: u933692@student.canberra.edu.au (Needham / Tate Stewart (ISE))
Subject: Re: Cacheing Hard Disk Controllers
Date: 1995/08/10
Message-ID: <40cha5$gt2@csc.canberra.edu.au>
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references: <3vn231$7fp@cleese.apana.org.au> <408nqk$hjf@aimnet1.aimnet.com> <DD1Gu9.KwH@news.cern.ch> <40c86u$143@werple03.mira.net.au>
organization: University of Canberra, ACT, Australia
newsgroups: comp.sys.ibm.pc.hardware.misc,aus.computers.ibm-pc,comp.sys.ibm.pc.hardware.storage