Hi Abhilash,
try to look at
man dumpadm
and setup your dump device. By default it is your swap device, (Do you have
swap configured ?) but it could be any other big-enough slice or zfs volume.
What happens is, that in case of crash Solaris writes all the kernel memory to
the swap device (by default, you can change the config using dumpadm -c -d)
and after reboot, Solaris detects, that there is a crash on swap device and
copies it's content into file in Savecore directory. The filenames will be
named unix.{number} and vmcore.{number}.
After that, it is possible to analyze that crash dumps using mdb {number}.
Tomas D.
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