hi all,
i have a L440GX+ intel server motherboard running 2 P3. The motherboard
has an on-board scsi controller aic7896 (ahc0, ahc1). Additionally i
have added an "Adaptec 3950 scsi controller" board(ahc2, ahc3). When i
boot an uniprocessor kernel everything works fine. However when i boot a
multiprocessor kernel everything seems ok till the boot mesg shows
"Waiting for scsi devices to settle". But after waiting for some time
the boot msg shows a lot of SCB timeouts and hangs. IF i remove the
additional scsi controller things start working again (except that the
system complains about unable to mount root partition...but it boots).
Since things work in a UP kernel i think it is an SMP related problem.
The mptable output is :-# Required:
options SMP # Symmetric MultiProcessor
Kernel
options APIC_IO # Symmetric (APIC) I/O
# Optional (built-in defaults will work in most cases):
#options NCPU=2 # number of CPUs
#options NBUS=4 # number of busses
#options NAPIC=1 # number of IO APICs
#options NINTR=24 # number of INTs
dmesg on the UP kernel shows
ahc0: <Adaptec aic7896/97 Ultra2 SCSI adapter> rev 0x00 int a irq 11 on
pci0.12.0
ahc0: aic7896/97 Wide Channel A, SCSI Id=7, 16/255 SCBs
ahc1: <Adaptec aic7896/97 Ultra2 SCSI adapter> rev 0x00 int a irq 11 on
pci0.12.1
ahc1: aic7896/97 Wide Channel B, SCSI Id=7, 16/255 SCBs
ahc2: <Adaptec 3950B Ultra2 SCSI adapter> rev 0x00 int a irq 10 on
pci0.13.0
ahc2: aic7896/97 Wide Channel A, SCSI Id=7, 16/255 SCBs
ahc3: <Adaptec 3950B Ultra2 SCSI adapter> rev 0x00 int a irq 10 on
pci0.13.1
ahc3: aic7896/97 Wide Channel B, SCSI Id=7, 16/255 SCBs
Irq 10 is not used by anything else. What can be the problem ??
thanx in advance
joy
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