Subject: Hard Drive Read Problems
To: NetBSD-Users <tech-kern@netbsd.org>
From: Matthew Fincham <matthewf@cat.co.za>
List: netbsd-users
Date: 01/02/2003 16:38:56
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Hi all,
I am using NetBSD 1.5.1 and have upgraded my pc and since noticed some =
harddrive read problems. My first PC (Celeron 1.2Ghz) had the Intel 815 =
chip for control of the Hard drive and my new one (P4 Celeron 2Ghz) uses =
the Intel 845 chip. I noticed that new PC was a bit sluggish and at =
times slower than my old one. After some time I realized that the =
harddrive access was slower on the P4 celeron using the 845 than on the =
1.2 celeron using the 815 chip. To test this I wrote a small program =
which would seek to a location on the drive and then read 640k into =
memory and repeat. I would then time the read operation. This program =
confirmed my suspicion that reading from the hard drive was a great deal =
slower on the P4 Celeron (Intel 845 chip) than on the 1.2 Celeron (Intel =
815). In both cases the hard drive is exactly the same. I am unsure as =
to what can cause such a problem. Is it a driver issue and is there =
something I can do to fix the problem? How would I fix the problem?=20
An added note is the the system improves dramatically with netBSD 1.6 =
and both PC's operate as expected. However I do not want to upgrade to =
1.6 just yet and would like a solution for 1.5.1, if possible.
Any help is much appreciated
Ian
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<DIV><FONT face=3DArial size=3D2></FONT><BR></DIV>
<DIV><FONT face=3DArial size=3D2>Hi all,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>I am using NetBSD 1.5.1 and have =
upgraded my pc and=20
since noticed some harddrive read problems. My first PC (Celeron 1.2Ghz) =
had the=20
Intel 815 chip for control of the Hard drive and my new one (P4 Celeron =
2Ghz)=20
uses the Intel 845 chip. I noticed that new PC was a bit sluggish and at =
times=20
slower than my old one. After some time I realized that the harddrive =
access was=20
slower on the P4 celeron using the 845 than on the 1.2 celeron using the =
815=20
chip. To test this I wrote a small program which would seek to a =
location on the=20
drive and then read 640k into memory and repeat. I would then time the =
read=20
operation. This program confirmed my suspicion that reading from the =
hard drive=20
was a great deal slower on the P4 Celeron (Intel 845 chip) than on the =
1.2=20
Celeron (Intel 815). In both cases the hard drive is exactly the same. I =
am=20
unsure as to what can cause such a problem. Is it a driver =
issue and is=20
there something I can do to fix the problem? How would I fix the =
problem?=20
</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>An added note is the the system =
improves=20
dramatically with netBSD 1.6 and both PC's operate as expected. However =
I do not=20
want to upgrade to 1.6 just yet and would like a solution for 1.5.1, if=20
possible.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Any help is much =
appreciated</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Ian</FONT></DIV></BODY></HTML>
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