kernel: aac0: **Monitor** NMI ISR: NMI_SECONDARY_ATU_ERROR on Dell
2500 series server.
Matthew.Sullivan at canberra.edu.au
Tue Sep 20 17:08:55 PDT 2005
This is a message for the archives.
console error messages showing:
kernel: aac0: **Monitor** NMI ISR: NMI_SECONDARY_ATU_ERROR
and lots of SCSI timeouts.
To fix, start with setting
in /boot/loader.conf, and rebooting.
If this fails check your BIOS version for both the main system and the RAID
controller (my case a Dell PERC 3/Di).
Both were factory shipped BIOSs:
Main BIOS: A01
RAID BIOS: 2.50
SMC BIOSs: 5.78/1.23
Upgrading the BIOSs to:
Main BIOS: A07
RAID BIOS: 2.80
SMC BIOSs: 5.87/1.32
Fixed the issue. BIOS notes show that around A03/A04 there was a fix
implemented to resolve spurious and false NMI errors.
Additional Info: Dell don't have it in the BIOS notes, update in the following
order using floppy boot/BIOS disks:
System Management Card and Backplane.
Main (System) BIOS
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