> On Wed, 10 Mar 1999, Serguei Koubouchine wrote:
>
> > The machine can be reliably crashed by writing to (or even reading lotta
> > files from) the MO drive no matter whether it's plugged to the CDTxxxx or to
> > a separate controller. No crashes when reading files from MO one-by-one with
> > several seconds pause between reads. No crashes had been encountered on
> > 2.2.0-pre6-ac2. Data corruption had been there since 2.1.129...
>
> I have seen that sort of behavior also with Adaptec chips (AIC-7870 and
> AIC-7895). My solution has been to avoid wild-car writes. Happens with
> my M2513a but I do ever remember seeing it happen with the M2512a.
>
> Harvey
>
I suggest turning off disconnect as a start. Adaptec and BusLogic
controllers have a BIOS menu. If this temporarily fixes the problem,
you probably have a drive that negotiates for a sync speed that it can't
possibly handle. Setting (forcing) the sync speed to be less than what it
negotiated will usually fix this problem.
Target 0: Queue Depth 28, Wide Synchronous at 40.0 MB/sec, offset 15
Target 1: Queue Depth 28, Wide Synchronous at 20.0 MB/sec, offset 15
Seagate ST34573W Disk, artifically reduced ^^^^^
Target 2: Queue Depth 28, Wide Synchronous at 40.0 MB/sec, offset 15
Target 3: Queue Depth 3, Synchronous at 5.00 MB/sec, offset 11
CDROM ^^^^^^
Target 4: Queue Depth 3, Synchronous at 4.00 MB/sec, offset 15
TAPE ^^^^^^
Cheers,
Dick Johnson
***** FILE SYSTEM WAS MODIFIED *****
Penguin : Linux version 2.2.2 on an i686 machine (400.59 BogoMips).
Warning : It's hard to remain at the trailing edge of technology.
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