From: Jeffrey D Grinnell (grinnell_at_acunet.net)
Date: Fri Feb 18 2000 - 14:53:43 EST
On Fri, 18 Feb 2000 11:12:33 -0800, stratmoen_at_home.com wrote:
>
>While Windows 2000 installs on a 770 (P5-233mmx) with no problems
>there appears to be compatibility problem with the hard disk.
>Interspersed with the normal disk access the drive appears to
>be resetting periodically. The symptom presents as the heads
>unloading followed by reloading and a short head sweep.
I've got a Thinkpad 770 and gave Win2000 RC2 a try on a spare HD. My
guess is that what you are seeing is the lazy writing of the cache to
the hard drive. With lazy writing, not all data is written to the hard
drive immediately. It is kept in memory for some short period and then
written to the hard drive when either the data's time limit in memory
has expired or the memory cache has filled.
Lazy writing lets you get better performance under load because you can
continue to read needed data from the hard drive while delaying the
writing to a time when the reading has finished. The bad thing is if
you lose power before the lazy writes to the drive are done you lose
that data not yet written to disk.
I can't be sure this is what you are seeing. I haven't spent much time
with Win2000 as I continue to do most of my work with OS/2. I do know
that under OS/2 I can set the size of this cache and the max delay
before it gets written to disk. I can even opt to turn lazy caching
off to force more immediate writes to the disk. I'm not sure how one
would do this under Win2000. Maybe someone with more Windows
experience can answer that.
>
>I have tried the most recent BIOS, as well as older BIOS versions,
>with identical results. In addition I have tried setting the
>IDE driver for PIO and even turned off APM.
APM would have been my first guess too.
>
>Does anyone have any ideas? How about results from installation
>of Win2000 on the same platform? Note that this is the original
>770 (no X or Z, etc).
Same thing here. Regular 770 with Win2000 RC2 on a 4 GB Apricorn HD.
Jeff
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