Date: Fri, 12 Apr 1996 23:19:11 -0400 (EDT) From: "Marc G. Fournier" <scrappy@ki.net> To: stable@freebsd.org Subject: Non-SCSI bus hang...I think... Message-ID: <Pine.BSI.3.92.960412230633.206B-100000@freebsd.ki.net>
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Hi...
Tonight, while doing some work on my -stable box, the machine
totally hung. I could switch VTs, but that about covered it.
My first impulse was to check out the hard drive light, to see
if it was a SCSI bus hang, but it was completely off, so although it had
the characteristics of a SCSI bus hang, I don't believe it was.
I popped down into DDB (CTL_ALT_ESC), which I could, but I don't
really know what I'm looking for in there that pertains to this. A trace
doesn't show anything but that pcvt is waiting, and that about covers
it.
When I did a panic though, to get a core dump, that's when the
hard drive LED came on bright red and the dump hung just after displaying
16, so, once more, I can't get a coredump out of this machine.
Now, my experience is that a SCSI bus hang shows itself by the
HD LED shining bright red...
There also wasn't the usual thrashing of disks just prior to the
hang. One of the terminals had a login session on it that if I entered
return repeatedly, the text would scroll up the screen though, but ctl-C
wouldn't get me out of what it was doing.
Hardware-wise, this machine is about as clean as they get.
SC-200 NCR SCSI controller, ATI Mach64 PCI Video card, SMC 8013 Ethernet
card, ACER 486DX4-100 using onboard serial.
She ran for just over a day this time, has done over 2days in
the past week, but never any more then that before either a VM fault, or
this latest freeze.
Is there anything in DDB that I can look for to try and narrow
down the problem? My awareness in DDB is limited to what I've been told
to check for in the past, which is limited to doing a trace and a ps :(
I'm not putting in a PR for this, cause I don't have enough information
currently for anyone to work with, and I'm trying to clean out the database,
not add more cruft to it :)
Suggestions, comments or ideas?
FreeBSD 2.1-STABLE #5: Tue Mar 26 14:40:09 EST 1996
scrappy@ki.net:/usr/src/sys/compile/kinet
CPU: i486 DX4 (486-class CPU)
Origin = "GenuineIntel" Id = 0x480 Stepping=0
Features=0x3<FPU,VME>
real memory = 16777216 (16384K bytes)
avail memory = 14692352 (14348K bytes)
Probing for devices on PCI bus 0:
chip0 <SiS 85c496> rev 49 on pci0:5
ncr0 <ncr 53c810 scsi> rev 2 int a irq 12 on pci0:11
ncr0 waiting for scsi devices to settle
(ncr0:0:0): "QUANTUM FIREBALL1280S 630C" type 0 fixed SCSI 2
sd0(ncr0:0:0): Direct-Access
sd0(ncr0:0:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
1222MB (2503872 512 byte sectors)
(ncr0:1:0): "QUANTUM LPS340S 020B" type 0 fixed SCSI 2
sd1(ncr0:1:0): Direct-Access
sd1(ncr0:1:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
327MB (670506 512 byte sectors)
(ncr0:2:0): "QUANTUM LP240S GM240S01X 4.6" type 0 fixed SCSI 2
sd2(ncr0:2:0): Direct-Access
sd2(ncr0:2:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
234MB (479350 512 byte sectors)
(ncr0:3:0): "CONNER CFP1060S 1.05GB 243F" type 0 fixed SCSI 2
sd3(ncr0:3:0): Direct-Access
sd3(ncr0:3:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
1013MB (2074880 512 byte sectors)
vga0 <VGA-compatible display device> rev 0 on pci0:15
Probing for devices on the ISA bus:
ed0 at 0x280-0x29f irq 5 maddr 0xd8000 msize 16384 on isa
ed0: address 00:00:c0:86:44:79, type WD8013EPC (16 bit)
vt0 at 0x60-0x6f irq 1 on motherboard
vt0: generic, 80 col, color, 8 scr, mf2-kbd, [R3.20-b24]
sio0 at 0x3f8-0x3ff irq 4 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
lpt0 at 0x378-0x37f irq 7 on isa
lpt0: Interrupt-driven port
lp0: TCP/IP capable interface
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: NEC 72065B
fd0: 1.44MB 3.5in
npx0 on motherboard
npx0: INT 16 interface
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