[ale] Disabling Cache?

[Greg Freemyer]

Memtest has a config option for cache.

It defaults to cache enabled for some tests and cache disabled for others.

Via the config option you can leave default, force cache on, or force
cache off for all tests.

Like Jeff, in the default config my machine showed memry errors.  With
cache forced to disabled, everything was good.

Greg
On 7/10/05, James P. Kinney III <jkinney at localnetsolutions.com> wrote:
> I don't think memtest checks cache ram. Or if it does, I've missed the
> config.
> 
> On Sat, 2005-07-09 at 11:56 -0400, Jeff Hubbs wrote:
> > I had an HP Vectra with a removable cache module that would periodically
> > just die, whether it was WinME or Linux (with WinME, hardware faults are
> > hard to pinpoint because the OS crashes so often).  In this case,
> > though, I seem to recall that memtest86 could run forever without a
> > problem.  Removing the cache module did slow the machine down, but it
> > never died again.
> >
> > Jeff
> >
> >
> > On Fri, 2005-07-08 at 16:51 -0400, J o n K e t t e n h o f e n wrote:
> > > Just my 2 cents worth:
> > >
> > > I have an ASUS P3B-F with an 850MHz Piii and the BIOS allows
> > > disabling the Level 1 and Level 2 caches each individually.
> > > You can test the effectiveness of this with memtest.
> > >
> > >
> > >
> > > >I have an old machine that I need to use from time to time.  PIII 700MHz.
> > > >
> > > >It has a unique (within my office) configuration of hardware raid and
> > > >scsi tape that I don't want to replicate right now.
> > > >
> > > >It has been unreliable recently and I just finished running Memtest on
> > > >it.  It runs fine if I have cache disabled, but it runs poorly if I
> > > >have cache enabled (via memtest).
> > > >
> > > >Is there a way to boot Linux with the cache disabled?  (I know it will
> > > >be slow, but I just need to restore one tape.)
> > > >
> > > >I prefer to use SuSE, and I have SuSE boot CDs from 8.0 forward.
> > > >
> > > >Greg
> > > >--
> > > >Greg Freemyer
> > > >The Norcross Group
> > > >Forensics for the 21st Century
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> --
> James P. Kinney III          \Changing the mobile computing world/
> CEO & Director of Engineering \          one Linux user         /
> Local Net Solutions,LLC        \           at a time.          /
> 770-493-8244                    \.___________________________./
> http://www.localnetsolutions.com
> 
> GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
> <jkinney at localnetsolutions.com>
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-- 
Greg Freemyer
The Norcross Group
Forensics for the 21st Century