Date: Thu, 23 May 96 06:48 PDT From: Chris Linstruth <cjl@qnet.com> To: freebsd-hardware@freebsd.org, freebsd-isp@freebsd.org Subject: FreeBSD: SCSI hangs, panics and other failures as nntp server Message-ID: <m0uMakP-0003ioC@cello.QNET.COM>
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Dear FreeBSD-Hardware (and ISP):
We at qnet have been attempting to use FreeBSD as a
Usenet News server for about a year. We are at this time
evaluating other alternatives because we have been unable to
achieve the stability required under this kind of load.
We are perfectly satisfied with 2.1.0-RELEASE's performance as
a Domain Name Server, mail hub, and W3 (apache) server.
We have built several different machines based on the AHA-1542,
NCR83C510, and the most recent being an AHA-2940 (AIC7870).
We have been unable to build a system that does not suffer
from:
SCSI Bus hangs - (you can switch VTs etc, but anything
accessing any SCSI device terminally hangs. Telnetting
in results in a connection but no login prompt, but
characters echo. You know what I'm talking about.
Random Reboots
Device Timeouts - with 2.1.0-RELEASE. We just upgraded
to the 2.2-960501-SNAP and now we're getting reboots
instead of system hangs. (detailed in kern/1157)
Is there anything we can do? We've replaced every component including
SCSI cables, terminators, etc. We've tried external SCSI cabinets, all
internal devices, and combinations of both.
We would certainly like to continue using FreeBSD for all our
subsystems, including Usenet. Where should we look next?
Would another host adapter (Buslogic?) solve all our problems?
If you were going to buy a new PCI host adapter for a FreeBSD system
what would it be?
What hardware deficiency would typically cause these symptoms?
Does the -stable kernel contain anything related to this that the 960501
snapshot does not?
Thanks in advance for *any* assistance.
(A project for today includes recompiling a kernel with the appropriate
debug options available, so that info should be available soon.)
----------
The Hardware:
FreeBSD 2.2-960501-SNAP #0: Wed May 1 14:09:30 1996
jkh@time.cdrom.com:/usr/src/sys/compile/GENERIC
Calibrating clock(s) relative to mc146818A clock ... i586 clock: 99463645 Hz, i8
254 clock: 1193062 Hz
CLK_USE_I8254_CALIBRATION not specified - using default frequency
CLK_USE_I586_CALIBRATION not specified - using old calibration method
i586 clock: 0 Hz
CPU: Pentium (99.46-MHz 586-class CPU)
Origin = "GenuineIntel" Id = 0x525 Stepping=5
Features=0x1bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8>
real memory = 33554432 (32768K bytes)
avail memory = 30466048 (29752K bytes)
Probing for devices on PCI bus 0:
chip0 <Intel 82437 (Triton) PCI cache memory controller> rev 1 on pci0:0
chip1 <Intel 82371 (Triton) PCI-ISA bridge> rev 2 on pci0:7:0
piix0 <Intel 82371 (Triton) Bus-master IDE controller> rev 2 on pci0:7:1
ahc0 <Adaptec 2940 Ultra SCSI host adapter> rev 0 int a irq 11 on pci0:19
ahc0: aic7880 Single Channel, SCSI Id=7, 16 SCBs
ahc0 waiting for scsi devices to settle
(ahc0:0:0): "FUJITSU M2694ES-512 812A" type 0 fixed SCSI 2
sd0(ahc0:0:0): Direct-Access 1033MB (2117025 512 byte sectors)
(ahc0:1:0): "FUJITSU M1606S-512 6226" type 0 fixed SCSI 2
sd1(ahc0:1:0): Direct-Access 1041MB (2131992 512 byte sectors)
(ahc0:2:0): "SEAGATE ST15230N 0298" type 0 fixed SCSI 2
sd2(ahc0:2:0): Direct-Access 4095MB (8386733 512 byte sectors)
(ahc0:3:0): "Quantum XP34300 81HB" type 0 fixed SCSI 2
sd3(ahc0:3:0): Direct-Access 4101MB (8399520 512 byte sectors)
Probing for devices on the ISA bus:
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: VGA color <16 virtual consoles, flags=0x0>
ed0 at 0x280-0x29f irq 3 maddr 0xd0000 msize 16384 on isa
ed0: address 00:00:c0:97:b7:7a, type WD8013EPC (16 bit)
ed1 not found at 0x300
fe0: disabled, not probed.
sio0: disabled, not probed.
sio1: disabled, not probed.
sio2: disabled, not probed.
sio3: disabled, not probed.
lpt0 at 0x378-0x37f irq 7 on isa
lpt0: Interrupt-driven port
lp0: TCP/IP capable interface
lpt1 not found at 0xffffffff
lpt2 not found at 0xffffffff
mse0: wrong signature ff
mse0 not found at 0x23c
psm0: disabled, not probed.
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: NEC 72065B
fd0: 1.44MB 3.5in
wdc0: disabled, not probed.
wdc1: disabled, not probed.
bt0 not found at 0x330
uha0 not found at 0x330
aha0 not found at 0x330
aic0 not found at 0x340
nca0 not found at 0x1f88
nca1 not found at 0x350
sea0 not found
wt0: disabled, not probed.
mcd0: disabled, not probed.
mcd1 not found at 0x340
matcdc0 not found at 0x230
scd0 not found at 0x230
ie0 not probed due to maddr conflict with ed0 at 0xd0000
ep0: disabled, not probed.
ix0: disabled, not probed.
le0: disabled, not probed.
lnc0 not probed due to I/O address conflict with ed0 at 0x280
lnc1: disabled, not probed.
ze0: disabled, not probed.
zp0: disabled, not probed.
npx0 on motherboard
npx0: INT 16 interface
apm0: disabled, not probed.
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