"DEBUG : error reading swap label on /dev/VolGroup00: [Errno 21] Is a directory" appearing in /var/log/anaconda.log, why ?

Issue

• The following errors appear in anaconda.log after a kickstart installation, why ?

"DEBUG : error reading swap label on /dev/VolGroup00: [Errno 21] Is a directory"

• Messages similar to the following are logged in 'anaconda.log'.

DEBUG : adding drive sda to disk list 
DEBUG : error reading swap label on /dev/VolGroup00: [Errno 21] Is a directory 
DEBUG : error reading xfs label on /dev/VolGroup00: [Errno 21] Is a directory 
DEBUG : error reading jfs label on /dev/VolGroup00: [Errno 21] Is a directory 
DEBUG : error reading reiserfs label on /dev/VolGroup00: [Errno 21] Is a directory </code>