Your description is not accurate enough for me to have a single clue about
the actual problem. If it was so impossible operation to set-up RH6.1 with
NCR/SYMBIOS controllers, for sure I would have been informed of that.
What you want to do is to check SCSI terminationq first. One terminator at
each SCSI BUS end and no more (you didn't mention termintators in your
description). The second point is to compare things that are comparable.
The SCSI configuration about SYNC DATA TRANSFERS, TAGGED COMMANDS etc...
can make great differences with dubious SCSI BUS or devices.
I donnot know if it is possible to know about the ncr driver static kernel
configuration and if it is possible to send bootup arguments to the driver
with the kernel distribution you install. When you will find how to do
that, you will be able tell the driver to use some slow but safe
initial configuration, for example:
(for the ncr53c8xx driver - change to sym53c8xx for the other one)
ncr53c8xx=sync:50,tags:0,wide:0
Will tell the driver to negotiate not more than 5 Mega-transfers per
second, not to use tagged commands and not to negotiate Wide data
transfers.
If your controller has NVRAM, then you just have to set-up the
corresponding configuration for your devices using the controller set-up.
(SYMBIOS and TEKRAM format supported)
G�rard.
On Thu, 21 Oct 1999, Mario Dix wrote:
> The Story So Far:
>
> For some time now I have been running RedHat 5.2 (last Kernel was 2.2.9)
> with two SCSI controllers:
> SYM8750SP (53c875; DDS-Drive and CDROM only)and DPT 3334UW (eata; 5 HDD
> as RAID) without any problems.
>
> And Now the Problems:
> Reinstallation from scratch of RH6.1: not even the installation worked!
> Whilst reading the RPM packages I got a stream of SCSI resets or
> CDROM-I/O errors, ending with the machine hanging. The problems where
> reproducible.
>
> After connecting the CD-Drive to the DPT controller the installation
> went OK.
> During operation, however, the errors continued on the NCR controller.
> Never ending SCSI-resets.
> Changing the driver from NCR to Symbios made no difference.
>
> I think I've changed everything there is to change:
> 3 different CD drives from two manufacturers (Toshiba and Pioneer)
> A different cable
> A different NCR controller (SYM8251S with a 53c825)
> Running the NCR without DDS drive, just the CDROM
> A different PCI slot
>
> Nothing changed. Always the same. Installation impossible. SCSI-resets.
>
> I suspect the [ncr|sym]53c8xx driver causes the problems.
>
> To verify this I installed a RH6.0 derivative yesterday (Halloween III
> with 2.2.9 and a few german adaptions). This installation went well and
> I couldn't see any problems afterwards.
>
> I have no clue what to do next.
> Any suggestions?
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