Date: Wed, 24 Apr 96 16:12 PDT From: Chris Linstruth <cjl@qnet.com> To: FreeBSD-gnats-submit@freebsd.org Subject: kern/1157: SCSI Disk Timeouts (ahc0) Message-ID: <m0uCDje-00070cC@mandolin.QNET.COM> Resent-Message-ID: <199604242320.QAA08936@freefall.freebsd.org>
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>Number: 1157
>Category: kern
>Synopsis: SCSI Disk Timeouts (ahc0)
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Class: support
>Submitter-Id: current-users
>Arrival-Date: Wed Apr 24 16:20:02 PDT 1996
>Last-Modified:
>Originator: CJ Linstruth
>Organization:
Quantum Networking Solutions, Inc.
>Release: FreeBSD 2.1-STABLE i386
>Environment:
FreeBSD 2.1.0-RELEASE #0: Wed Apr 10 14:31:02 PDT 1996
root@mandolin.qnet.com:/usr/src/sys/compile/NNTPSERVER
CPU: 99-MHz Pentium 735\\90 or 815\\100 (Pentium-class CPU)
Origin = "GenuineIntel" Id = 0x525 Stepping=5
Features=0x1bf<FPU,VME,PSE,MCE,CX8,APIC>
real memory = 33554432 (32768K bytes)
avail memory = 30556160 (29840K bytes)
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
sio0 at 0x3f8-0x3ff irq 4 on isa
sio0: type 16550A
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
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: NEC 72065B
fd0: 1.44MB 3.5in
wdc0 not found at 0x1f0
wdc1 not found at 0x170
bt0 not found at 0x330
uha0 not found at 0x330
ahc1 not found
ahb0 not found
aha0 not found at 0x330
aic0 not found at 0x340
nca0 not found at 0x1f88
nca1 not found at 0x350
sea0 not found
wt0 not found at 0x300
mcd0: disabled, not probed.
mcd1: disabled, not probed.
matcdc0 not found at 0x230
scd0 not found at 0x230
ie0 not probed due to maddr conflict with ed0 at 0xd0000
ep0 not found at 0x300
ix0 not probed due to maddr conflict with ed0 at 0xd0000
le0 not probed due to maddr conflict with ed0 at 0xd0000
lnc0 not probed due to I/O address conflict with ed0 at 0x280
lnc1 not found at 0x300
ze0 not found at 0x300
zp0 not found at 0x300
npx0 on motherboard
npx0: INT 16 interface
Probing for devices on the PCI bus:
chip0 <Intel 82437 (Triton)> rev 1 on pci0:0
chip1 <Intel 82371 (Triton)> rev 2 on pci0:7
ahc0 <Adaptec 2940 Ultra SCSI host adapter> rev 0 int a irq 11 on pci0:20
ahc0: aic7870 Ultra Single Channel, SCSI Id=7, aic7870, 255 SCBs
ahc0 waiting for scsi devices to settle
(ahc0:0:0): "QUANTUM LIGHTNING 540S 241E" type 0 fixed SCSI 2
sd0(ahc0:0:0): Direct-Access 525MB (1075649 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)
changing root device to sd0a
WARNING: / was not properly dismounted.
sd0 and sd1 are internal, sd2 and sd3 are each in their own
enclosure. Termination has been doublechecked. Nay, triplechecked.
>Description:
System hang with the following on the console:
ahc0: target 1, lun 0 (sd1) timed out
sd1(ahc0:1:0): BUS DEVICE RESET message queued
ahc0: target 2, lun 0 (sd1) timed out
Different occurrances are on different targets. We've
started keeping a history but no pattern yet.
>How-To-Repeat:
Error occurs occasionally. Sometimes uptimes are as much as a week,
other times as little as a few hours. This machine is a Usenet
News server with articles on the two 4GB drives, overview on sd0
and history on sd1. It also does light UUCP news and mail.
I can't pinpoint any particular event that triggers this. Sometimes
it happens during expire, sometimes not.
>Fix:
>Audit-Trail:
>Unformatted:
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