For information about the Sun Blade X6250 server module, 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 March 2011) at: http://docs.oracle.com/cd/E19045-01/blade.x6250/index.html