Re: SERIOUS Bug...

Alan Clucas (orb@s13r3.wadham.ox.ac.uk)
Thu, 29 Feb 1996 17:47:45 +0000 (GMT)

> I can reliably lock a 1.3.xx series kernel (including 1.3.69). Normally,
> it locks during any heavy disk access, including (but NOT limited to)
> backups.
>
> This bug has caused down time, lockups, data corruption.
>
> I can demonstrate this --> start a few copies of 'updatedb'. Repeatedly
> execute 'bdflush'. (sync would probably do the same thing).

I have tried this, and not managed to recreate this. I have a similar
system.
> 1.3.69
> Modular Kernel
> CMD 640B HD
AMD 486dx2 80 with onboard PCI CMD640B

This is probably due to the naff design of the CMD chip, what speed is your
bus running at. I have had to reduce mine to 1/2 clock speed (20 Mhz) with
one wait state (needed for the graphics card, so don't know about the disk
I/O) when I added a new drive in order to keep the system stable. At
40Mhz it wouldn't even boot most of the time. If you can slow down your
bus it might help.

Alan