From: Denis Hall (denhall_at_ismi.net)
Date: Fri Feb 18 2000 - 16:12:28 EST
There is a possible issue with the 5GB OBI drive on the 770. I'm having a
pain of a time playing with the recovery disk on my 9549-1au 770 which has
the 5gb drive. The IBM site confirms a BIOS problem in this drive. Perhaps
Win2000 is also a problem for the drive...
I will now yield to the greater wisdom of more informed Drive experts ( Bill
Morrow?)...
Denis Hall, Michigan
-----Original Message-----
From: Jeffrey D Grinnell <grinnell_at_acunet.net>
To: ThinkPad List <ThinkPad_at_cs.utk.edu>
Date: Friday, February 18, 2000 1:52 PM
Subject: Re: 770 hard disk compatibility with Win2000
>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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