SCSI parity errors

[Sebastiaan <S.Breedveld@ITS.TUDelft.NL>]

Hello,

I have a problem with my SCSI harddisk/controller which occurs more often
lately. The errors have the form:

(scsi0:A:1:0): parity error detected in Data-in phase. SEQADDR(0x7c) SCSIRATE(0x88)

and are repeatedly printed in the system logs, until the partitions are
mounted read-only.


Usually I have to turn off the computer, press on the SCSI-card (I still
have the idea that the card is literally broken, but unsure if this is the
cause of the problems), check the filesystem and carry on. It goes well
for about 1 or 2 weeks, until the problem rises again.


Could this be due by:
- an aging harddisk (less than 5 years old, Quantum Viking II),
- incorrect connection hardware (parity on or off, termination etc. I am
pretty sure it is ok, and it is the only device on the bus)
- the card IS broken
- something else?


I use kernel 2.4.18 with the new aic7xxx driver for Adaptec 2940 card.

Thanks in advance,
Sebastiaan


--
  NT is the OS of the future. The main engine is the 16-bit Subsystem
  (also called MS-DOS Subsystem). Above that, there is the windoze 95/98
  16-bit Subsystem. Anyone can see that 16+16=32, so windoze NT is a
  *real* 32-bit system.



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