6.1 Freezes - Suspect SCSI Issue
lists at qwirky.net
Wed Jan 10 21:36:01 UTC 2007
Andrea Venturoli wrote:
> Juergen Heberling wrote:
>> Hi all
>> Please suggest some way of diagnosing this problem:
>> System freezes after being up in production and apparently stable for
>> several weeks, no dump, no error message, nothing on the console - so
>> I suspect hardware.
> > ...
>> Here is my dmesg, long lines were wrapped:
>> FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
>> cpu0 (BSP): APIC ID: 0
>> cpu1 (AP): APIC ID: 1
>> cpu2 (AP): APIC ID: 6
>> cpu3 (AP): APIC ID: 7
>> ahd0: <Adaptec AIC7902 Ultra320 SCSI adapter> port
>> mem 0xdd200000-0xdd201fff irq 32 at device 2.0 on pci3
>> ahd0: [GIANT-LOCKED]
>> aic7902: Ultra320 Wide Channel A, SCSI Id=7, PCI-X 67-100Mhz, 512 SCBs
>> ahd1: <Adaptec AIC7902 Ultra320 SCSI adapter> port
>> mem 0xdd202000-0xdd203fff irq 33 at device 2.1 on pci3
>> ahd1: [GIANT-LOCKED]
>> aic7902: Ultra320 Wide Channel B, SCSI Id=7, PCI-X 67-100Mhz, 512 SCBs
> I've had freezes as you describe on two different servers with ahd and
> SMP. The solution was to turn SMP off, unfortunately :(
Are these Xeon's? If so you might want to try disabling Hyper-threading
in the bios. I have noticed some strange behavior on 6.2-RC1 with a
IBM x336 server here. It never crashed but the throughput "felt" off,
so I disabled Hyper-threading and things seemed to perform the way I
expected it to should.
I would have more details when I actually have time to work on the
server itself, however in the meantime give it a shot. If you have 2
CPU's you shouldn't see the CPU2/CPU3 listed just the 2 aftewards.
FYI - I have used that particular controller successfully on several
servers recently so I don't think that should be a overall issue for you.
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