Re: Weird data corruption?

Haruhiko Okumura (okumura@matsusaka-u.ac.jp)
Tue, 29 Jun 1999 08:57:53 +0900 (JST)


linkern@cocoa.demon.co.uk wrote:

> On Wed, 23 Jun 1999, Haruhiko Okumura wrote:
>
> > Alex Butche (linkern@cocoa.demon.co.uk) wrote:
> >
> > > I had similar problems until I switched a Creative Labs 24x drive for a
> > > Tae-Il (who?!) 32x drive. You might get away with tweaking the IDE cables
> > > and checking they're seated properly.
> >
> > I'm having a similar problem (data mutations while disk read/write).
> > Thanks, Alex. I'll try that.
> >
> > Also, Pablo Bianucci, who originally wrote about the weird data
> > corruption, kindly wrote to me that he might have been accessing the
> > memory at a too fast speed, and slowing down things a bit in the BIOS
> > setup had seemingly fixed the problem.
> >
> > But I'm still somewhat uneasy about possible data mutations. Is there
> > any way to have Linux report checksum error for disk read/write?
>
> Only with SCSI and UDMA. Plain old (E)IDE has no provision for checksumming,
> AFAIK. Linux will report CRC errors on UDMA transfers if they are
> encountered.
>
> I'm sure someone will correct me if I'm wrong. :)
>
> > Haruhiko Okumura, Ph.D. <okumura@matsusaka-u.ac.jp>
>
> Best Regards,
> Alex.

Thanks, Alex.

Meanwhile I encountered another data corruption (mutation of four
consecutive bytes of a very large file) on my SCSI disk a few days
ago, and Linux didn't report a CRC error. Is this normal?

-- 
Haruhiko Okumura, Ph.D. <okumura@matsusaka-u.ac.jp>
Matsusaka University, 1846 Kubo-cho, Matsusaka, 515-8511 Japan
Phone: +81-598-29-1122  Fax: +81-598-29-1014
http://www.matsusaka-u.ac.jp/~okumura/

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