"Erich J. Ritzmann" wrote:
> On Fri, 2 Jul 1999, Steven Roberts wrote:
> > I've got one running off an old Adaptec 2940UW controller. I think sync
> > and wide negotiation left on. jumpers on the 4416S left at defaults
> > (except scsi ID set to 3)
>
> Many of us had to explicitly set wide off for ID=3/4416 to avoid
> kernel panic. Some differences: I am using a brand new 2940UW; I am
> using a K6-2/400; I am using Fujitsu 4.5g UW disks also attached to the
> 2940UW.
>
> > never had a glitch (except for a cdrecord bug not handling wide
> > controllers right)
>
> Can you post a fix for this cdrecord bug...
the bug didn't kill me, so I didn't make one, I think the SCSI generic
maintainer (whose name slips me at the moment) had a fix.
Basic problem was cdrecord mapped the high ids (8-15) onto id's 0-7 on
the second controller. I didn't have a unmanagble conflict (HD's on id
12,15 so mapped to 4,7 which weren't in use on my second controller).
> > Get standard 2+ MB/s reads from it, and 4x burns work great (even with
> > rc5 and an egcs building running in the background) and the cdrecord
> > buffer rarely drops below 100% -- on a dual P-166...
>
> The aforementioned K6-2/400 also keeps the buffer nearly 100%, but then
> right around the time it displays the message about "fixating", the
> SCSI bus gets reset (the resultant CD is not mountable).
>
> > Now the hard drives I am burning the image from are on a different
> > controller (A DPT).
>
> Are you saying that you have no other devices on the 2940UW?
not exactly, my machine config:
- Dual P-166 on a Tyan tomcat II w/64MB RAM (60ns set to run at 70ns)
(note this does give me slow memory speeds, had to set the memory
timings slow or else the tyan would freak -- shouldn't matter much but
in case we have a timing issue...)
- Adaptec 2940 UW with:
- Toshiba 6.7 CD
- AIWA NS-20 tape drive
- The yamaha 4416S CDRW
(all devices connected to the narrow internal connector)
- DPT 2144UW with:
- one IBM DORS-32160W 2.1GB
- two IBM DCAS-34330W 4.1GB
(external connector to a seperate SCSI tower)
- Netgear with a real DEC chip 10/100 NIC
- Vanilla ISA VGA card.
software:
RH5.2
kernel is a fresh build of straight 2.2.5
cdrecord is from the RH rpm (version 1.8a15)
Machine runs as a SMB/HTTP/FTP/NFS/MYSQL/CVS server
It also always has the rc5 client running.
I know I haven't been doing backups while using the CDRW, but I think
I've used the toshiba CD during a burn before.
> > Lemme know if anyone wants for info...
>
> I do think that a few of us would be interested in the rest of the
> configuration details...
HTH,
Steve
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