Re: scsi problems, ncr53x8xx and 2+ devices resets bus
Gerard, here's an update on that problem i was having a few weeks ago
with my ancient SOYO brand revision 1 NCR 53c810 card.
On Fri, 19 Dec 1997, Gerard Roudier wrote:
> Here are 2 driver messages from your report and what they let me think:
> > Dec 19 12:24:24 siva kernel: ncr53c810-0:0: ERROR (a0:0) (47-67-80) (8/33) @ script (628:0f000000).
> > Dec 19 12:24:24 siva kernel: ncr53c810-0: script cmd = 60000040
> DSTAT = 0xa0 -> bit 0x20 means PCI BUS fault condition detected.
> DCMD/DBC = 0x0f000000 CLEAR ACK (current SCRIPTS instruction)
> DSP points to 0x60000040 MOVE WHEN MSG_IN (next SCRIPTS instruction)
> The weird thing is that I did'nt find such a sequence of SCSI
> SCRIPTS instructions in the source. Such a sequence exists but with
> instructions in reverse order. The offset in the script (628) is near
> the SCSI reselection step, probably near the read of the IDENTIFY
> Even if your problem seems to be triggered by SCSI device
> configuration and/or load, the above lets me think that it is a
> real PCI bus problem. You are using a very old 810 chip (rev. 1)
> on a recent system. I donnot have access to any errata of so old
> chips, but my guess is that they probably suffer of bunches. Using
> such a old 810 chip with a recent host bridge is IMO not a very safe
> I would be very interested in the result with a recent 810 chip
> version (>=0x12). (In case of you could borrow one).
I bought an ASUS SC-200 card, and it is working perfectly. No errors,
no problems, just a perfectly working scsi system :-).
Bus 0, device 8, function 0:
SCSI storage controller: NCR 53c810 (rev 18).
Medium devsel. IRQ 15. Master Capable. Latency=64. Min Gnt=8.Max Lat=64.
I/O at 0x6100.
Non-prefetchable 32 bit memory at 0xe0800000.
thanks for your help. it would never have occurred to me that an old PCI
card might be incompatible with a new PCI motherboard.
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