MSDP pool conversion fails with "fail to get ENT_Path from S_StorageDatabase section to construct RefDBManager"

Problem

Converting a Media Server Deduplication Pool storage to the new format either as part of an upgrade or by running /usr/openv/pdde/pdconfigure/scripts/installers/PDDE_convert.sh fails with the following messages:

Checking storage format 
================================================================== 
Your Media Server Deduplication Pool requires conversion 
Converting data to new format 
================================================================== 
fail to get ENT_Path from S_StorageDatabase section to construct RefDBManager There are errors in the conversion Please check logs in /disk/log/convert to solve the problem and retry 

Also running the the stconv '--status' command returns to the prompt without giving any output:

#/usr/openv/pdde/pdcr/bin/stconv --status
#

Error Message

fail to get ENT_Path from S_StorageDatabase section to construct RefDBManager 
There are errors in the conversion 
Please check logs in /disk/log/convert to solve the problem and retry 

Cause

 This was caused by <storage_path>/etc/puredisk/contentrouter.cfg being a data file rather than an ASCII text file. This can be shown by using the unix command "file":

# file contentrouter.cfg
contentrouter.cfg: data

Solution

To resolve this issue the contentrouter.cfg file needs to be converted to the correct format. This can be done with the following steps:

1) Rename the contentrouter.cfg file:

# mv contentrouter.cfg contentrouter.cfg_old

2) Use the unix command "cat" to read the old file and output to a new one:

# cat -v contentrouter.cfg_old > contentrouter.cfg

3) Check the new contentrouter.cfg file is now in the correct format:

# file contentrouter.cfgcontentrouter.cfg: ASCII English text