"VCS ERROR V-16-10001-5586 Mount point <mount_point> is busy with some other block device."

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Article ID: 100026643

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Description

Error Message

VCS ERROR V-16-10001-5586 (server) Mount:mount_mntpoint:monitor:Mount point / is busy with some other block device.

Cause

The behavior has several possible causes:

1. This mount resource was conflicting with another service group that is listed in the main.cf, in the same cluster (offline and frozen) that performs a similar mount function.

2. Two different LUNs (disks) attempted to mount to the same mount point. 

3. One LUN is mounted on top of another LUN, hiding its mount point. This may occur when nested mount points are not mounted in the correct order.


Example:

User wants to have nested mount points /oracle and /oracle/locks. The Unix command df shows the mount points in the order they were mounted.  A correct df -h for nested mount points looks like this:
 


# df -h

Filesystem             size   used  avail capacity  Mounted on
/dev/vx/dsk/datadg/vol1
                       2.9G    19M   2.7G     1%    /oracle
/dev/vx/dsk/datadg/locks
                        50M   3.1M    44M     7%    /oracle/locks

 


 

An incorrect configuration has a df -h that looks like this:


# df -h

Filesystem             size   used  avail capacity  Mounted on

/dev/vx/dsk/datadg/locks
                        50M   3.1M    44M     7%    /oracle/locks
/dev/vx/dsk/datadg/vol1
                       2.9G    19M   2.7G     1%    /oracle

 

 


In this case, /oracle is mounted on top of /oracle/locks, causing /oracle/locks to be hidden from the Mount agent. The Mount agent issues an error message to /var/VRTSvcs/log/engine_A.log:


 

 

Resolution

  • Ensure that LUNs are mounted in the correct order.
  • Ensure that a single mount point is not being used by multiple resources within the same cluster.
  • Verify that cluster resource, and group dependencies, are correct.


Note: The cluster configuration can be reviewed from the main.cf file. Dependencies are noted by "requires" statements.

 

Issue/Introduction

The error "VCS ERROR V-16-10001-5586 Mount point /<mount_point> is busy with some other block device" is reported in the cluster engine.log file.

Additional Information

UMI: V-16-10001-5586