PowerPath for Linux 6.5 does not start automatically: "Starting PowerPath: /etc/init.d/PowerPath: line 1717: uniq : command not found" found in boot.log. "Starting PowerPath: /etc/init.d/PowerPath: /usr/bin/uniq: No such file or directory" on console

Summary: After installing Powerpath for Linux 6.5, the following error occurs on boot when Powerpath loads "Starting PowerPath: /etc/init.d/PowerPath: line 1717: uniq : command not found". After boot manual start ...

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Symptoms

Upgraded PowerPath or fresh installed PowerPath for Linux 6.5.

DELL EMC SW: PowerPath for Linux 6.5

After installing PowerPath for Linux 6.5, PowerPath will not start on boot. The following error is seen when trying to start PowerPath:  
 
"Starting PowerPath: /etc/init.d/PowerPath: line 1717: uniq : command not found" is logged in boot.log
"Starting PowerPath: /etc/initi.d/PowerPath: /usr/bin/uniq: No such file or directory" appears on the Console upon boot.

PowerPath is successfully started manually after the host has booted up.

Cause

The issue is caused by the result of the host having /usr separated from / .

For example:  
  
Filesystem              1K-blocks         Used   Available Use% Mounted on
/dev/mapper/vg01-lvroot
                          1998672       556332     1337484  30% /                              <--- Root
tmpfs                   132060916            0   132060916   0% /dev/shm
/dev/sda1                  245679        73875      158697  32% /boot
/dev/mapper/vg01-lvgrid
                        103164844        37104    97888268   1% /grid
/dev/mapper/vg01-lvopt
                          8125880      2230424     5476028  29% /opt
/dev/mapper/vg01-lvoracle
                         50992892        53080    48348248   1% /oracle
/dev/mapper/vg01-lvtmp
                          3030800        18720     2854796   1% /tmp
/dev/mapper/vg01-lvusr
                          8125880      2014876     5691576  27% /usr                          <--- /usr not located under root
/dev/mapper/vg01-lvvar
                          3997376      1078044     2709620  29% /var

Resolution

Immediate workaround:
To allow PowerPath to boot, copy /usr/bin/uniq to /bin and it will allow it to load on boot.

Note:
If the user is also mounting /bin under a disk managed by PowerPath, this will not work and the user needs to make the changes to allow /bin/uniq to be available when / is mounted.

This issue is fixed in PowerPath 7.0 and higher.

Additional Information

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The error message does not always show up in /var/messages. It will show up in the boot.log which can be checked as well.
Article Properties
Article Number: 000167759
Article Type: Solution
Last Modified: 23 Sep 2024
Version:  4
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