SUMMARY: restore a crashed test cluster

lars.rieneck_at_tellabs.com
Date: 04/13/04

  • Next message: Douglas B. Jones: "evmget errors - follow-up" 
    Date: Tue, 13 Apr 2004 10:39:24 +0200
To: tru64-unix-managers@ornl.gov

    Hello all

    Thanks to: Joachim Jaeckel, Martin Rønde Andersen, Bob Collins
    For the very fine feedback

    Problem: I have a 5.1B cluster with dupatch 3. To try our crash restore
    procedure,
    I have taken a full backup with vdump to tape. I have then zerorised all
    disks including
    the quorum disk. Booted on the UNIX cdrom, and restore the following
    filedomians/filesets:

            1) cluster_root#root
            2) cluster_usr#usr
            3) cluster_var#var
            4) root1_domain#root

    I then go to the boot prompt again, and try to start the first member by
    booting, with the following command:

    >>> boot -fl ai dkb100.1.0.15.0

    I then boot with the following kernel parameters, to
    be able to boot without a quorum disk:

    Enter: <kernel_name> [option_1 ... option_n]
      or: ls [name]['help'] or: 'quit' to return to console
    Press Return to boot 'vmunix'
    # vmunix clubase:cluster_expected_votes=1 clubase:cluster_qdisk_votes=0

    The boot procedure starts, but stops after the following statements:

    Waiting for cluster mount to complete
    clsm: checking for peer configurations
    clsm: initialized
    CNX QDISK: Successfully claimed quorum disk, adding 0 vote.

    Solution 1: From Bob Collins i got a restore procedure, to restore a
    cluster on different hardware, that was very useful, Thanks.

    Solution 2: When I boot on the UNIX cd-rom I got a different disk
    naming, than
    the restored unix had. So I had to rename the disk devices to the
    correct
    numbering according to the unix system i would like to restore.

    Solution 3: When I make the backup of the cluster, the backup includes
    the disklabels.
    It is a good idea to keep the cnx partition on the member boot disk,
    that spared me
    from setting the cfs:cluster_root_dev1_min/maj values in the boot
    sequence.

    Solution 4: When the members in the cluster has to be booted, both
    members MUST be
    booted with the following commad: vmunix
    clubase:cluster_expected_votes=1
    clubase:cluster_qdisk_votes=0. When both members are up, the quorum has
    to be deleted,
    before it can created again.

    /Lars

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  • Next message: Douglas B. Jones: "evmget errors - follow-up"

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