Hi all Wow many answers with several solutions.....but first thanks a lot to all who answered! Firstable it must be said that the Open Boot must have the correct version 3.25 or higher. I use 3.25 and this is OK. Second it is only recommended to use the 64bit mode if the above Open Boot version is installed and on normal booting there is a message like following: Rebooting with command: boot Boot device: disk File and args: | NOTICE: 64-bit OS installed, but the 32-bit OS is the default for the processor(s) on this system. See boot(1M) for more information. Booting the 32-bit OS ... This message indicates that the Open Boot version recognize the problem about 64bit mode or 32bit mode for this processor but on default the 32bit mode would be booted. It is also recommended to do it only with 200Mhz or higher. It could be done also on lower speed but it is not recommended. There are three possibilities to boot the 64bit mode: First possibility: Open the file /platform/sun4u/boot.conf and uncommet the last line in this file: ALLOW_64BIT_KERNEL_ON_UltraSPARC_1_CPU=true Reboot the system! Second possibility: If the system is running and your are under a shell it could be used: eeprom boot-file=kernel/sparcv9/unix Reboot the system! Third possibility: If you are under OK prompt it could be used: setenv boot-file kernel/sparcv9/unix File being read is under /platform/<uname -i>/kernel/sparcv9/ Reboot the system! A nice link with the neccessary information is http://slacksite.com/technotes/64bitUltra1.html Ther was no information in the answer to NOT do it about problems. The most of the answers are saying "yes we do it also and we had never problems". OK I will do it and enjoy....by by all and many thanks... Andrea Soliva _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagersReceived on Thu Jan 9 18:47:07 2003
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