Summary: E6500 and boot message (DR issues)

From: Badinter, George (george.badinter_at_citigroup.com)
Date: 08/06/03

  • Next message: Andrew Davis: "Odd power issue with Sun E-250" 
    To: "'sunmanagers@sunmanagers.org'" <sunmanagers@sunmanagers.org>
Date: Wed, 6 Aug 2003 13:16:00 -0400

    Many Thanks to Bobby Williams who answered my question and summarized for
    us.
    Please see a copy of his message below:

    Kernel cage DISABLED means that the system will not "constrict" the
    kernel to a single CPU board. The kernel has to be on a single board
    before anything can be removed with DR. DR can still be used to insert
    a board, but it won't get picked up by the system until a reboot (so
    what is the point).

    DR works. It can save from having to bring a system down. "System
    down" is relative. When a CPU board is DR'ed out, the system will
    actually "freeze". User's could see applications stop. Oracle will get
    timeout errors for users that are actively searching/sorting/WRITING
    data.

    The freeze does not occur on I/O boards, (my experience anyway) only CPU
    boards due to the memory "draining" process.

    I/O board 1 can't be "DR'ed" out since it powers the clock board.

    The CPU board that has the kernel caged on it can't be DR'ed out either.
    It is not always CPU brd 0. I have played with where the kernel is
    located in the DR situation (and how to move it to where I wanted it).
    Seems that it will reside on the first board with all the memory slots
    filled (only from experience, I don't know what or how the selection is
    made.).

    >-----Original Message-----
    >From: Badinter, George
    >Sent: Wednesday, August 06, 2003 11:00 AM
    >To: 'sunmanagers@sunmanagers.org'
    >Subject: E6500 and boot message
    >
    >
    >Hey Ladies and Gents.
    >
    >We have a 6500 hundred which lost one of the CPU's with
    >panic. Upon reboot
    >we have noticed the following error message
    >
    >NOTICE: DR Kernel Cage is DISABLED
    >
    >Sun is saying that it actually means that DR (dynamic reconfigure) is
    >disable and we can't do hot-swap until we unable it back.
    >They even gave us a parameter to put in /etc/system. However, DR
    >documentation doesn't mentioned any of that....
    >
    >
    >Has anyone seen this before and tried DR? Or does anyone knows what it
    >actually means?
    >
    >
    >George
    >_______________________________________________
    >sunmanagers mailing list
    >sunmanagers@sunmanagers.org
    >http://www.sunmanagers.org/mailman/listinfo/sunmanagers
    _______________________________________________
    sunmanagers mailing list
    sunmanagers@sunmanagers.org
    http://www.sunmanagers.org/mailman/listinfo/sunmanagers

  • Next message: Andrew Davis: "Odd power issue with Sun E-250"