Cluster SBD partition fails from mismatched metadata

This document (7010933) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise High Availability Extension 11 (HAE)
Split Brain Detection (SBD) Partition

Situation

The cluster nodes do not fence properly. There are three SBD partitions configured:

# cat /etc/sysconfig/sbd
SBD_DEVICE="/dev/sdb1;/dev/sdc1;/dev/sdd1"
SBD_OPTS="-W"

The following metadata appears on the sbd partitions.

# /usr/sbin/sbd -d /dev/sdb1 dump
==Dumping header on disk /dev/sdb1
Header version     : 2
Number of slots    : 255
Sector size        : 512
Timeout (watchdog) : 5
Timeout (allocate) : 2
Timeout (loop)     : 1
Timeout (msgwait)  : 10
==Header on disk /dev/sdb1 is dumped

# /usr/sbin/sbd -d /dev/sdc1 dump
==Dumping header on disk /dev/sdc1
Header version     : 2
Number of slots    : 255
Sector size        : 512
Timeout (watchdog) : 25
Timeout (allocate) : 2
Timeout (loop)     : 1
Timeout (msgwait)  : 10
==Header on disk /dev/sdc1 is dumped

# /usr/sbin/sbd -d /dev/sdd1 dump
==Dumping header on disk /dev/sdd1
Header version     : 2
Number of slots    : 255
Sector size        : 512
Timeout (watchdog) : 5
Timeout (allocate) : 2
Timeout (loop)     : 1
Timeout (msgwait)  : 10
==Header on disk /dev/sdd1 is dumped


Resolution

Recreate the SDB partitions and perform a rolling restart of the cluster nodes. For example,

1. Display the current SBD partitions.
# cat /etc/sysconfig/sbd
SBD_DEVICE="/dev/sdb1;/dev/sdc1;/dev/sdd1"
SBD_OPTS="-W"

2. Reformat the SBD partition on each devices listed:
# sbd -d /dev/sdb1 -d /dev/sdc1 -d /dev/sdd1 create

3. Reboot one node in the cluster. When it comes back online, reboot another node. Repeat the process until each node in the cluster has been rebooted.

Cause

SDB partition metadata did not match.

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7010933
  • Creation Date: 15-Oct-2012
  • Modified Date:12-Oct-2022
    • SUSE Linux Enterprise High Availability Extension

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