Here is the output of tree from my /path/to/tomcat/bin/solr directory:

teemo:solr pak$ tree
.
├── data
│   ├── feeds
│   │   ├── index
│   │   └── spellchecker
│   └── savedsearches
│       ├── index
│       └── spellchecker
├── feeds -> /Users/pak/projects/app/PyApp/config/solr_ac/feeds
├── savedsearches -> /Users/pak/projects/app/PyApp/config/solr_ac/savedsearches
└── solr.xml -> /Users/pak/projects/app/PyApp/config/solr_ac/solr.xml



And here is my solr.xml file:

<solr persistent="true" sharedLib="lib">
    <cores adminPath="/admin/cores">
        <core name="savedsearches" instanceDir="savedsearches">
            <property name="dataDir" value="/data/savedsearches" />
        </core>
        <core name="feeds" instanceDir="feeds">
            <property name="dataDir" value="/data/feeds" />
        </core>
    </cores>
</solr>


Both cores have the same entry in solrconfig.xml for datadir:
<dataDir>${solr.data.dir:}</dataDir>