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Unable to Umount /u01 on Exadata X5 machine (Oracle 12.1.0.2 BP6) (Doc ID 2001832.1)

Last updated on FEBRUARY 03, 2019

Applies to:

Linux OS - Version Oracle Linux 6.6 with Unbreakable Enterprise Kernel [2.6.39] and later
Oracle Cloud Infrastructure - Version N/A and later
Linux x86-64

Symptoms

The customer is unable to umount the /u01 directory.

This can be seen via the following steps:
 1. Stop the application using /u01:

# cd /opt/oracle.ExaWatcher; ./ExaWatcher.sh --stop
# /u01/app/12.1.0.2/grid/bin/crsctl stop crs
# /u01/app/12.1.0.2/grid/tfa/bin/tfactl stop


2. Attempt to umount the file system, but it fails with the error below:

# umount /u01
umount: /u01: device is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))
#


The following are also observed:

1. No output when running lsof:

# lsof +D /u01
#


2. No output when running fuser:

# fuser -mv /u01
# fuser -mv /dev/mapper/VGExaDb-LVDbOra1
#


3. No loop devices:

# losetup -a
#


4. No NFS exports:

# exportfs -v
#

 

Cause

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In this Document
Symptoms
Cause
Solution
References


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