Even with the correct access permissions, sonarr throws the following error:
15-4-27 17:57:41.7|Error|EventAggregator|DiskScanService failed while processing [SeriesUpdatedEvent]
System.UnauthorizedAccessException: Access to the path "/volume1/video/Series/TheSeries/@eaDir" is denied.
at System.IO.Directory.GetFileSystemEntries (System.String path, System.String searchPattern, FileAttributes mask, FileAttributes attrs) [0x00063] in /spksrc/native/mono/work-native/mono-3.10.0/mcs/class/corlib/System.IO/Directory.cs:498
at System.IO.Directory.GetFiles (System.String path, System.String searchPattern) [0x00000] in /spksrc/native/mono/work-native/mono-3.10.0/mcs/class/corlib/System.IO/Directory.cs:296
at System.IO.Directory.GetFilesRecurse (System.String path, System.String searchPattern, System.Collections.Generic.List`1 all) [0x00000] in <filename unknown>:0
at System.IO.Directory.GetFilesRecurse (System.String path, System.String searchPattern, System.Collections.Generic.List`1 all) [0x0001f] in /spksrc/native/mono/work-native/mono-3.10.0/mcs/class/corlib/System.IO/Directory.cs:312
at System.IO.Directory.GetFiles (System.String path, System.String searchPattern, SearchOption searchOption) [0x00014] in /spksrc/native/mono/work-native/mono-3.10.0/mcs/class/corlib/System.IO/Directory.cs:304
at NzbDrone.Common.Disk.DiskProviderBase.GetFiles (System.String path, SearchOption searchOption) [0x0003e] in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Common\Disk\DiskProviderBase.cs:142
at NzbDrone.Core.MediaFiles.DiskScanService.GetVideoFiles (System.String path, Boolean allDirectories) [0x00019] in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\MediaFiles\DiskScanService.cs:124
at NzbDrone.Core.MediaFiles.DiskScanService.Scan (NzbDrone.Core.Tv.Series series) [0x0012b] in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\MediaFiles\DiskScanService.cs:103
at NzbDrone.Core.MediaFiles.DiskScanService.Handle (NzbDrone.Core.Tv.Events.SeriesUpdatedEvent message) [0x00000] in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\MediaFiles\DiskScanService.cs:161