I checked the ILO logs but there is nothing there.
I was thinking, if its good to generate crash dump in such instances.
I know we used to send break signal to hung solaris and then run sync command at OK prompt.
then it generates a panic sting and crash dump.
can we generate crash dump in case of solaris on HP system to analyse the reason behind hang.
You can certainly generate it but I don't know how we can do it with HP platforms.
Please read the following document for more details : Solaris[TM] Operating System: How to force a kernel core dump on an x86 or x64 system (Doc ID 1003085.1)