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Using CPU1 as an example:

1. View /var/adm/messages to figure out which CPU is having problems.
2. Use psrinfo to view your CPU configuration
3. As root, take the CPU offline using the command ‘psradm -f 1′
3a. The syntax is ‘psradm ‘
4. Verify the CPU is offline with ‘psrinfo’
5. To bring an offline CPU back online, use ‘psradm -n 1′


來源網址：http://www.tech-recipes.com/rx/192/disable-a-cpu-in-solaris-using-psradm/