Date: Mon, 17 Aug 1998 23:16:02 -0700 From: Mark Rubin <mrr@primenet.com> To: aic7xxx@FreeBSD.ORG Subject: Is crash and reboot from aic7xxx, 2940, or motherboard? Message-ID: <35D91C22.28AB0381@primenet.com>
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o I've been trying to debug a new system for two weeks and finally
have to ask for advice. The machine crashes after it transfers
somewhere between 4 and 30 MB of data through a 2940AU. It locks
up, sometimes scrambling video sync, and then reboots after a few
seconds.
o The "sometimes scrambling" and "between 4 and 30" do not mean the
crash is random. For a given combination of kernel, SCSI
peripheral, and media, (see below for hardware/software list) the
crash is exactly repeatable. It always happens after the same
number of bytes have been transferred, and video scrambling is
likewise deterministic. The crash occurs whether data is being read
from or written to the SCSI device, and whether the data is being
copied to/from to the IDE drive or thrown away. Blocksize of the
transfer doesn't matter, nor does video mode (standard console VT or
X windows).
o The only exceptions to the above are as follows: Kernels patched
with 5.1.0-pre5 and -pre7 crash at boot time, scrambling video right
after printing "Scanning channel for devices". Also, 2.1.115 with
-pre7 crashes at boot with an AGP video card, but not until after
boot, reading data, with ISA video. All other crashes are
unaffected by video card, though the exact number of bytes
transferred before crashing changes.
o Any speculations would be appreciated as to whether this problem is
caused by the aic7xxx driver, the 2940 card, or the motherboard. I
don't think my testing has conclusively proved anything, and am out
of ideas (and hardware to swap) for more experiments.
o Here's the list of hardware and software. I haven't tried all
possible combinations, but enough to be fairly certain of the
accuracy of the comments above.
Hardware:
1) Tyan S1830S Tsunami AT (not ATX) motherboard. 440BX,
PIIX4e, 82371EB, AGP, PCI(4), EIDE(2). AMI V1.07 BIOS.
All BIOS shadowing/caching turned off
2) Adaptec AHA-2940AU, narrow, BIOS v1.32. Sync negotiation,
disconnection options turned off, maximum sync transfer
rate 5 MB/sec
3a) Matrox Millenium II 8MB AGP -or-
3b) Diamond Speedstar Plus 1MB ISA
4) IBM Ultra ATA-33 drive, master on primary EIDE
5) Teac CD-ROM, master on secondary EIDE
6a) Wangtek 5150ES SCSI tape drive, internal, 50-pin
pass-thru terminator -or-
6b) Sony CDU55S SCSI CD-ROM, internal, on-board termination
Software:
Kernels:
2.0.33 (insmod scsi_mod, aic7xxx, sr_mod modules)
2.0.34 (insmod scsi_mod, aic7xxx, sr_mod modules)
2.0.34
2.0.35
2.0.35 patched 5.1.0-pre5
2.0.35 patched 5.1.0-pre7
2.1.115
2.1.115 patched 5.1.0-pre7
Applications:
tar
cp
dd
simple byte-counting and -printing C program
o Here's /proc/pci:
PCI devices found:
Bus 0, device 19, function 0:
SCSI storage controller: Adaptec AIC-7861 (rev 3).
Medium devsel. Fast back-to-back capable. IRQ 10. Master
Capable. Latency=64. Min Gnt=4.Max Lat=4.
I/O at 0xe800.
Non-prefetchable 32 bit memory at 0xfebff000.
Bus 0, device 7, function 3:
Bridge: Intel 82371AB PIIX4 ACPI (rev 2).
Medium devsel. Fast back-to-back capable.
Bus 0, device 7, function 2:
USB Controller: Intel 82371AB PIIX4 USB (rev 1).
Medium devsel. Fast back-to-back capable. IRQ 255. Master
Capable. Latency=64.
I/O at 0xef80.
Bus 0, device 7, function 1:
IDE interface: Intel 82371AB PIIX4 IDE (rev 1).
Medium devsel. Fast back-to-back capable. Master Capable.
Latency=64.
I/O at 0xffa0.
Bus 0, device 7, function 0:
ISA bridge: Intel 82371AB PIIX4 ISA (rev 2).
Medium devsel. Fast back-to-back capable. Master Capable. No
bursts.
Bus 1, device 0, function 0:
VGA compatible controller: Matrox Millennium II AGP (rev 0).
Medium devsel. Fast back-to-back capable. Master Capable.
Latency=64.
Prefetchable 32 bit memory at 0xec000000.
Non-prefetchable 32 bit memory at 0xfeafc000.
Non-prefetchable 32 bit memory at 0xfe000000.
Bus 0, device 1, function 0:
PCI bridge: Intel 440BX - 82443BX AGP (rev 2).
Medium devsel. Master Capable. Latency=64. Min Gnt=136.
Non-prefetchable 32 bit memory at 0x40010100.
Non-prefetchable 32 bit memory at 0x22a0d0d0.
Non-prefetchable 32 bit memory at 0xfea0fda0.
Non-prefetchable 32 bit memory at 0xed80eb80.
Bus 0, device 0, function 0:
Host bridge: Intel 440BX - 82443BX Host (rev 2).
Medium devsel. Master Capable. Latency=64.
Prefetchable 32 bit memory at 0xf0000000.
--
MARK
mrr@primenet.com
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