For information about the Sun Fire X4600 M2 server, go to the support site:
At that site, you can find links to the following information and downloads:
Product information and specifications (search the Knowledge base for 'System Handbook')
Software and firmware downloads (look under 'Patches and Updates')
Legacy product documentation is still available (archive mode only as of December 2010) at: http://docs.oracle.com/cd/E19121-01/sf.x4600m2/index.html