"Timedout SCB already complete. Interrupts may not be functioning."

Thu Sep 11 09:53:50 PDT 2003

The system:

FreeBSD lizzy.catnook.com 5.1-CURRENT FreeBSD 5.1-CURRENT #57: Sun Aug 24
04:14:36 PDT 2003
root at lizzy.catnook.com:/disk0/usr/obj/disk0/usr/src/sys/LIZZY  i386

I just replaced an Adaptec 19160 (which has been working fine for years in
this setup) with a 39160, and added a extra disk to the B channel on the
39160. The 39160 has the latest BIOS revision, 3.10.0, and is left at its
default settings.

With an August 24th kernel I am now seeing these:

Sep 11 09:28:13 lizzy kernel: ahc1: Timedout SCB already complete. Interrupts
may not be functioning.

dmesg:

Copyright (c) 1992-2003 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD 5.1-CURRENT #57: Sun Aug 24 04:14:36 PDT 2003
    root at lizzy.catnook.com:/disk0/usr/obj/disk0/usr/src/sys/LIZZY
Preloaded elf kernel "/boot/kernel.old/kernel" at 0xc0464000.
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel Pentium III (701.59-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x683  Stepping = 3
  Features=0x383f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
real memory  = 536788992 (511 MB)
avail memory = 516579328 (492 MB)
Pentium Pro MTRR support enabled
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcibios: BIOS version 2.10
Using $PIR table, 9 entries at 0xc00f0e80
pcib0: <Intel 82443BX (440 BX) host to PCI bridge> at pcibus 0 on motherboard
pci0: <PCI bus> on pcib0
pci_cfgintr: 0:9 INTA routed to irq 4
pci_cfgintr: 0:11 INTA BIOS irq 10
pci_cfgintr: 0:11 INTB routed to irq 4
pci_cfgintr: 0:14 INTA routed to irq 10
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci_cfgintr: 0:1 INTA routed to irq 4
pcib1: slot 0 INTA is routed to irq 4
pci1: <display, VGA> at device 0.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 4.0 on pci0
isa0: <ISA bus> on isab0
pci0: <mass storage, ATA> at device 4.1 (no driver attached)
pci0: <serial bus, USB> at device 4.2 (no driver attached)
pci0: <bridge, PCI-unknown> at device 4.3 (no driver attached)
pcm0: <AudioPCI ES1370> port 0xd000-0xd03f irq 4 at device 9.0 on pci0
ahc0: <Adaptec 3960D Ultra160 SCSI adapter> port 0xb800-0xb8ff mem 0xdf800000-0xdf800fff irq 10 at device 11.0 on pci0
aic7899: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
ahc1: <Adaptec 3960D Ultra160 SCSI adapter> port 0xb400-0xb4ff mem 0xdf000000-0xdf000fff irq 4 at device 11.1 on pci0
aic7899: Ultra160 Wide Channel B, SCSI Id=7, 32/253 SCBs
tx0: <SMC EtherPower II 10/100> port 0xb000-0xb0ff mem 0xde800000-0xde800fff irq 10 at device 14.0 on pci0
miibus0: <MII bus> on tx0
qsphy0: <QS6612 10/100 media interface> on miibus0
qsphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
tx0: address 00:e0:29:09:e4:1a, type SMC9432TX
orm0: <Option ROM> at iomem 0xc0000-0xcffff on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model IntelliMouse, device ID 3
fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> at port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
unknown: <PNP0400> can't assign resources (port)
unknown: <PNP0501> can't assign resources (port)
unknown: <PNP0501> can't assign resources (port)
unknown: <PNP0700> can't assign resources (port)
unknown: <PNP0f13> can't assign resources (irq)
unknown: <PNP0000> can't assign resources (port)
unknown: <PNP0303> can't assign resources (port)
Timecounter "TSC" frequency 701593688 Hz quality 800
Timecounters tick every 10.000 msec
Waiting 2 seconds for SCSI devices to settle
sa0 at ahc0 bus 0 target 3 lun 0
sa0: <HP C1533A A907> Removable Sequential Access SCSI-2 device 
sa0: 10.000MB/s transfers (10.000MHz, offset 32)
da3 at ahc1 bus 0 target 2 lun 0
da3: <SEAGATE ST39102LC 0004> Fixed Direct Access SCSI-2 device 
da3: 80.000MB/s transfers (40.000MHz, offset 15, 16bit), Tagged Queueing Enabled
da3: 8683MB (17783240 512 byte sectors: 255H 63S/T 1106C)
da2 at ahc0 bus 0 target 4 lun 0
da2: <IBM DDRS-34560D DC1B> Fixed Direct Access SCSI-2 device 
da2: 40.000MB/s transfers (20.000MHz, offset 15, 16bit), Tagged Queueing Enabled
da2: 4357MB (8925000 512 byte sectors: 255H 63S/T 555C)
da1 at ahc0 bus 0 target 1 lun 0
da1: <IBM DDRS-34560W S92A> Fixed Direct Access SCSI-2 device 
da1: 40.000MB/s transfers (20.000MHz, offset 15, 16bit), Tagged Queueing Enabled
da1: 4357MB (8925000 512 byte sectors: 255H 63S/T 555C)
da0 at ahc0 bus 0 target 0 lun 0
da0: <IBM DDRS-34560W S92A> Fixed Direct Access SCSI-2 device 
da0: 40.000MB/s transfers (20.000MHz, offset 15, 16bit), Tagged Queueing Enabled
da0: 4357MB (8925000 512 byte sectors: 255H 63S/T 555C)
Mounting root from ufs:/dev/da2s1a
ahc1: Timedout SCB already complete. Interrupts may not be functioning.
ahc1: Timedout SCB already complete. Interrupts may not be functioning.
ahc1: Timedout SCB already complete. Interrupts may not be functioning.

Sep 11 09:38:37 lizzy kernel: ahc1: Timedout SCB already complete. Interrupts
may not be functioning.
Sep 11 09:39:55 lizzy kernel: ahc1: Timedout SCB already complete. Interrupts
may not be functioning.
Sep 11 09:48:22 lizzy kernel: tx0: device timeout 16 packets
Sep 11 09:48:22 lizzy kernel: tx0: seems we can continue normaly
Sep 11 09:49:57 lizzy kernel: tx0: device timeout 16 packets
Sep 11 09:49:57 lizzy kernel: tx0: seems we can continue normaly

I am using what looks like a decent, undamaged Ultra160-LVD/SE cable for the B
controller, ahc1, and I have never had any problems with the other cable on
the 19160. The 39160 has supposedly never been used. The motherboard is an
Asus CUBX.

What could be wrong? Could the 39160 or the B cable be faulty?

Any help appreciated.

Thanks,
-- 
Jos Backus                       _/  _/_/_/      Sunnyvale, CA
                                _/  _/   _/
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jos at catnook.com        _/_/   _/_/_/          require 'std/disclaimer'