6.1 Freezes - Suspect SCSI Issue

[Andrea Venturoli]

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 
> 0x2400-0x24ff,0x2000-0x20ff
>         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 
> 0x2c00-0x2cff,0x2800-0x28ff
>         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 :(

  bye
	av.