Found Problem (Re: Unstable gzip/gunzip)
Hmmmmmmmmmm, some bit errors in my memory dimms, found with memtest86.
Cool util, I believe I will keep it...
-dh
Dan Hugo wrote:
>
> I am seeing some very unstable behavior which I am trying to track down,
> and I would really really appreciate some input...
>
> Here is what I am seeing on this machine:
>
> Slink install, SMP kernel 2.0.36
> Asus P2B-D MB, 2 PIII/450, 256M ram (2 PC100 128M DIMMs)
> IBM 14GXP 14.6G drive, UDMA disabled (part of test...)
>
> Stable for some time, then suddenly you name it, it crashed. I have
> also attempted to run the slink installed kernel (single processor,etc),
> and see similar results.
>
> One test I perform to see a failure is to move a file from my /home to
> /tmp
> gunzip file.gz; gzip file; gzip -t file.gz
>
> I run this loop anywhere from 5 to 20 times, no problems, but
> eventually, I will get a bad crc. This tells me that I am headed for
> trouble.
>
> On some reboots, I get a mess of errors, others no problem. Netscape
> 4.61 runs great, or crashes before a window is even drawn. Lots of
> segfaulting, or stable operation for a while.
>
> I have JUST upgraded to slink, and at the same time upgraded to this new
> MB with lots of memory, and a new hard drive. SO, I am attempting to
> isolate the problem.
>
> I was suspicious that this drive (7200 RPM, UDMA) was either overheating
> crammed between a floppy and a sparq drive (so I moved it in my case) or
> failing due to some UDMA problems (so I disabled UDMA in bios).
>
> I disabled MPS 1.4 support in the bios.
>
> I installed kernel 2.2.1 from the stable slink (r2?) from a debian site
> (original install from lsl cds, BTW).
>
> I still see weird behavior.
>
> I have noticed, though, that my aging power supply sometimes needs some
> coaxing to power up from shutdown (perhaps fluxuating power supply
> problems?), or it could be a marginal memory cell/row/column/chip. I
> have had the memory almost filled up with tons of stuff running, with no
> problems, but who knows.
>
> Does anyone have any experience with this sort of flakiness? I grabbed
> memtest from a link on freshmeat.net and built it, and am about to
> explore that, I have a fan blowing right on the board in case it was
> overheating in some way, and I am running out of other ideas...
>
> Any input greatly appreciated!
> Thanks
> Dan Hugo
>
> --
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