No, you cannot.
See this link:
http://docs.splunk.com/Documentation/Splunk/latest/admin/indexesconf
thawedPath =
* An absolute path that contains the thawed (resurrected) databases for the index.
* Cannot be defined in terms of a volume definition.
* Required. Splunk will not start if an index lacks a valid thawedPath.
No, you cannot.
See this link:
http://docs.splunk.com/Documentation/Splunk/latest/admin/indexesconf
thawedPath =
* An absolute path that contains the thawed (resurrected) databases for the index.
* Cannot be defined in terms of a volume definition.
* Required. Splunk will not start if an index lacks a valid thawedPath.