WebDav 404 not found with NFS local storage

Steps to reproduce

Install owncloud from RPM repo ownCloud 9.1.3 (stable)
Mount a NFS share on your server
add local storage on NFS directory
Expected behaviour

Can see your files in owncloud

Actual behaviour

Can't see files in owncloud. I can list my NFS directory with apache user.

Server configuration

Operating system: Centos 7.3

Web server: Apache 2.4.6

Database: MariaDB 5.5

PHP version: 5.4.16

ownCloud version: 9.1.3 (stable)

Updated from an older ownCloud or fresh install: fresh install

Where did you install ownCloud from: RPM

Signing status (ownCloud 9.0 and above): all clear

List of activated apps:

If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your ownCloud installation folder
The content of config/config.php:

{
"system": {
"updatechecker": false,
"instanceid": "oc5lqcc57und",
"passwordsalt": "REMOVED SENSITIVE VALUE",
"secret": "REMOVED SENSITIVE VALUE",
"trusted_domains": [
"cloud.geekops.fr"
],
"datadirectory": "\/data\/owncloud\/",
"overwrite.cli.url": "http:\/\/cloud.geekops.fr\/owncloud",
"dbtype": "mysql",
"version": "9.1.3.1",
"dbname": "owncloud",
"dbhost": "localhost",
"dbtableprefix": "oc_",
"dbuser": "REMOVED SENSITIVE VALUE",
"dbpassword": "REMOVED SENSITIVE VALUE",
"logtimezone": "UTC",
"installed": true,
"maintenance": false,
"loglevel": 0,
"memcache.local": "\OC\Memcache\APC"
}
}

Are you using external storage, if yes which one: local

Are you using encryption: yes

Are you using an external user-backend, if yes which one:no

Client configuration

Browser: Chrome

Operating system: Windows

Logs

Web server error log

no error
ownCloud log (data/owncloud.log)

Exception: {"Message":"HTTP\/1.1 404 File with name Photo could not be located","Exception":"Sabre\DAV\Exception\NotFound","Code":0,"Trace":"#0 \/var\/www\/html\/owncloud\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php(903): OCA\DAV\Connector\Sabre\ObjectTree->getNodeForPath('Photo')\n#1 \/var\/www\/html\/owncloud\/3rdparty\/sabre\/dav\/lib\/DAV\/CorePlugin.php(334): Sabre\DAV\Server->getPropertiesForPath('Photo', Array, 1)\n#2 [internal function]: Sabre\DAV\CorePlugin->httpPropFind(Object(Sabre\HTTP\Request), Object(Sabre\HTTP\Response))\n#3 \/var\/www\/html\/owncloud\/3rdparty\/sabre\/event\/lib\/EventEmitterTrait.php(105): call_user_func_array(Array, Array)\n#4 \/var\/www\/html\/owncloud\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php(459): Sabre\Event\EventEmitter->emit('method:PROPFIND', Array)\n#5 \/var\/www\/html\/owncloud\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php(248): Sabre\DAV\Server->invokeMethod(Object(Sabre\HTTP\Request), Object(Sabre\HTTP\Response))\n#6 \/var\/www\/html\/owncloud\/apps\/dav\/appinfo\/v1\/webdav.php(56): Sabre\DAV\Server->exec()\n#7 \/var\/www\/html\/owncloud\/remote.php(164): require_once('\/var\/www\/html\/o...')\n#8 {main}","File":"\/var\/www\/html\/owncloud\/apps\/dav\/lib\/Connector\/Sabre\/ObjectTree.php","Line":170,"User":"admin"}

How shall ownCloud magically know that you added files? If its mounted into the data directory of a user you would need to run a file scan via occ command. Better would be to add your NFS as external storage.