Install error - LXC - Splunk Enterprise/Light - failed with code '1'

Running either Splunk Enterprise or Light for the first time, I receive the error below. The command to start splunk is as follows: /opt/splunk/bin/splunk start Console output: Splunk> All batbelt. No tights. Checking prerequisites... Checking http port [8000]: open Checking mgmt port [8089]: open Checking appserver port [127.0.0.1:8065]: open Checking kvstore port [8191]: open Checking configuration... Done. Creating: /opt/splunk/var/lib/splunk Creating: /opt/splunk/var/run/splunk Creating: /opt/splunk/var/run/splunk/appserver/i18n Creating: /opt/splunk/var/run/splunk/appserver/modules/static/css Creating: /opt/splunk/var/run/splunk/upload Creating: /opt/splunk/var/spool/splunk Creating: /opt/splunk/var/spool/dirmoncache Creating: /opt/splunk/var/lib/splunk/authDb Creating: /opt/splunk/var/lib/splunk/hashDb New certs have been generated in '/opt/splunk/etc/auth'. Checking critical directories... Done Checking indexes... homePath='/opt/splunk/var/lib/splunk/audit/db' of index=_audit on unusable filesystem. Validating databases (splunkd validatedb) failed with code '1'. If you cannot resolve the issue(s) above after consulting documentation, please file a case online at http://www.splunk.com/page/submit_issue root@splunk:~#