Thanks for the suggestion Steve. Everything look's okay with the
registers, but I put my /proc/pci below just in case I'm misreading it
(I'm no expert).
As Doug Ledford suggested (thank you Doug), last night I patched the
AIC7xxx up to 5.1.29. I failed to see that patch on his site before, but
it does fix numerous problems, so, crossing my fingers, I'll try
tracking the server today and tomorrow.
I also explored with scsiinfo -d as C. Polisher suggested, but the only
difference with than his drives was the Correction Span (his was 22,
mine 232). Can't see that doing anything.
Lastly, on a side note, looking at the defects list, I found one of my
9.1GB Cheetah drives has 1526 defects in the manufacturers table. I
haven't had that much experience with SCSI drives, but doesn't that seem
high?
Thanks to everyone for their help.
Jeff Hill
"Steven N. Hirsch" wrote:
> On Mon, 1 May 2000, Jeff Hill wrote:
> > I have now spent five weeks off-and-on trying to find out why the system
> > with a new Adaptec 2940U2W and 2xSegate LVD drives hangs momentarily
> > (using 2.2.14 kernel with raid-2.2.14-B1 patch). The closest thing I
> > have to a cause is that it seems to happen only when there is a load
> > (medium to heavy) on the server and it happens less when I reduce the
> > speed in the SCSI controller from 80Mb to 40Mb.
>
> Just a WAG, but I fought a similar-sounding problem here on my ASUS P2B-DS
> system board. After much head-banging, it turned out that I was setting
> the CPU mtrr registers such that they were write-gathering over the
> memory-mapped IO region of the SCSI controller! For some reason, the
> address range used by my AGP video board had changed underneath me and I
> hadn't noticed.
>
> The symptoms were exactly what you describe in your posting. Check
> /proc/pci and your init scripts carefully.
PCI devices found:
Bus 0, device 0, function 0:
Host bridge: Intel 440BX - 82443BX Host (rev 3).
Medium devsel. Master Capable. Latency=64.
Prefetchable 32 bit memory at 0xe4000000 [0xe4000008].
Bus 0, device 1, function 0:
PCI bridge: Intel 440BX - 82443BX AGP (rev 3).
Medium devsel. Master Capable. Latency=64. Min Gnt=128.
Bus 0, device 4, function 0:
ISA bridge: Intel 82371AB PIIX4 ISA (rev 2).
Medium devsel. Fast back-to-back capable. Master Capable. No
bursts.
Bus 0, device 4, function 1:
IDE interface: Intel 82371AB PIIX4 IDE (rev 1).
Medium devsel. Fast back-to-back capable. Master Capable.
Latency=32.
I/O at 0xd800 [0xd801].
Bus 0, device 4, function 2:
USB Controller: Intel 82371AB PIIX4 USB (rev 1).
Medium devsel. Fast back-to-back capable. IRQ 12. Master
Capable. Latency=32.
I/O at 0xd400 [0xd401].
Bus 0, device 4, function 3:
Bridge: Intel 82371AB PIIX4 ACPI (rev 2).
Medium devsel. Fast back-to-back capable.
Bus 0, device 10, function 0:
VGA compatible controller: ATI Mach64 GT (Rage II) (rev 154).
Medium devsel. Fast back-to-back capable. IRQ 10. Master
Capable. Latency=32. Min Gnt=8.
Non-prefetchable 32 bit memory at 0xe2000000 [0xe2000000].
I/O at 0xd000 [0xd001].
Non-prefetchable 32 bit memory at 0xe1800000 [0xe1800000].
Bus 0, device 12, function 0:
SCSI storage controller: Adaptec AHA-2940U2 (rev 0).
Medium devsel. Fast back-to-back capable. BIST capable. IRQ
11. Master Capable. Latency=32. Min Gnt=39.Max Lat=25.
I/O at 0xb800 [0xb801].
Non-prefetchable 64 bit memory at 0xe1000000 [0xe1000004].
>
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