Hi,

For Sun machines, you have the prtdiag ( man prtdiag ) utility... run it with -v and it will tell you if there're any problem with the hardware... On AIX, you have diag command ( man diag ).

You may also see Sun VTS ( http://www.sun.com/oem/products/vts/ ), and Tivoli ( http://www-3.ibm.com/software/tivoli/ ) .

Also, take a look at swatch ( http://swatch.sourceforge.net/ ) .

Good luck !