10-30-2005
I could probably throw my two pennies in here as I recently mirrored my Solaris 10 system (Intel) via the command line. There are many problems with this, regarding uncontrollable kernel panicking if a disk fails due to the fact the thing is trying to write to the UFS log on the defective disk - but on Intel the workaround provided by Sun doesn't workaround the problem so there are more issues...
Anyway, I have written everything up
in this article in the hope that it'll save others the hours of head scratching that I endured.
Ta,
ZB
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LEARN ABOUT CENTOS
ddi_in_panic
ddi_in_panic(9F) Kernel Functions for Drivers ddi_in_panic(9F)
NAME
ddi_in_panic - determine if system is in panic state
SYNOPSIS
#include <sys/ddi.h>
#include <sys/sunddi.h>
int ddi_in_panic(void);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI).
DESCRIPTION
Drivers controlling devices on which the system may write a kernel crash dump in the event of a panic can call ddi_in_panic() to determine
if the system is panicking.
When the system is panicking, the calls of functions scheduled by timeout(9F) and ddi_trigger_softintr(9F) will never occur. Neither can
delay(9F) be relied upon, since it is implemented via timeout(9F).
Drivers that need to enforce a time delay such as SCSI bus reset delay time must busy-wait when the system is panicking.
RETURN VALUES
ddi_in_panic() returns 1 if the system is in panic, or 0 otherwise.
CONTEXT
ddi_in_panic() may be called from any context.
SEE ALSO
dump(9E), delay(9F), ddi_trigger_softintr(9F), timeout(9F)
Writing Device Drivers
SunOS 5.10 23 Jun 1997 ddi_in_panic(9F)