Fixed: Hide some more irrelevant paths from System->Disk Space such as /boot.

src/NzbDrone.Common/Disk/DriveInfoMount.cs

@@ -51,7 +51,7 @@ namespace NzbDrone.Common.Disk
         {
             get
             {
-                if (VolumeLabel.IsNullOrWhiteSpace())
+                if (VolumeLabel.IsNullOrWhiteSpace() || VolumeLabel.StartsWith("UUID=") || Name == VolumeLabel)
                 {
                     return Name;
                 }

src/NzbDrone.Core.Test/DiskSpace/DiskSpaceServiceFixture.cs

@@ -130,5 +130,25 @@ namespace NzbDrone.Core.Test.DiskSpace
             Mocker.GetMock<IDiskProvider>()
                   .Verify(v => v.GetAvailableSpace(It.IsAny<string>()), Times.Never());
         }
+
+        [TestCase("/boot")]
+        [TestCase("/var/lib/rancher")]
+        [TestCase("/var/lib/kubelet")]
+        [TestCase("/var/lib/docker")]
+        [TestCase("/some/place/docker/aufs")]
+        public void should_not_check_diskspace_for_irrelevant_mounts(string path)
+        {
+            var mount = new Mock<IMount>();
+            mount.SetupGet(v => v.RootDirectory).Returns(path);
+            mount.SetupGet(v => v.DriveType).Returns(System.IO.DriveType.Fixed);
+
+            Mocker.GetMock<IDiskProvider>()
+                  .Setup(v => v.GetMounts())
+                  .Returns(new List<IMount> { mount.Object });
+
+            var freeSpace = Subject.GetFreeSpace();
+
+            freeSpace.Should().BeEmpty();
+        }
     }
 }

src/NzbDrone.Core/DiskSpace/DiskSpaceService.cs

@@ -1,7 +1,8 @@
 using System;
-using System.IO;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
+using System.Text.RegularExpressions;
 using NLog;
 using NzbDrone.Common.Disk;
 using NzbDrone.Common.Extensions;
@@ -22,6 +23,8 @@ namespace NzbDrone.Core.DiskSpace
         private readonly IDiskProvider _diskProvider;
         private readonly Logger _logger;
 
+        private static readonly Regex _regexSpecialDrive = new Regex("^/var/lib/(docker|rancher|kubelet)$|^/boot$|docker(/var)?/aufs", RegexOptions.Compiled);
+
         public DiskSpaceService(ISeriesService seriesService, IConfigService configService, IDiskProvider diskProvider, Logger logger)
         {
             _seriesService = seriesService;
@@ -32,37 +35,36 @@ namespace NzbDrone.Core.DiskSpace
 
         public List<DiskSpace> GetFreeSpace()
         {
-            var diskSpace = new List<DiskSpace>();
-            diskSpace.AddRange(GetSeriesFreeSpace());
-            diskSpace.AddRange(GetDroneFactoryFreeSpace());
-            diskSpace.AddRange(GetFixedDisksFreeSpace());
+            var rootPaths = new List<string>();
+            rootPaths.AddRange(GetSeriesRootPaths());
+            rootPaths.AddRange(GetDroneFactoryRootPaths());
+            rootPaths.AddRange(GetFixedDisksRootPaths());
 
-            return diskSpace.DistinctBy(d => d.Path).ToList();
+            return GetDiskSpace(rootPaths.Distinct()).ToList();
         }
 
-        private IEnumerable<DiskSpace> GetSeriesFreeSpace()
+        private IEnumerable<string> GetSeriesRootPaths()
         {
-            var seriesRootPaths = _seriesService.GetAllSeries()
+            return _seriesService.GetAllSeries()
                 .Where(s => _diskProvider.FolderExists(s.Path))
                 .Select(s => _diskProvider.GetPathRoot(s.Path))
                 .Distinct();
-
-            return GetDiskSpace(seriesRootPaths);
         }
 
-        private IEnumerable<DiskSpace> GetDroneFactoryFreeSpace()
+        private IEnumerable<string> GetDroneFactoryRootPaths()
         {
             if (_configService.DownloadedEpisodesFolder.IsNotNullOrWhiteSpace() && _diskProvider.FolderExists(_configService.DownloadedEpisodesFolder))
             {
-                return GetDiskSpace(new[] { _diskProvider.GetPathRoot(_configService.DownloadedEpisodesFolder) });
+                yield return _configService.DownloadedEpisodesFolder;
             }
-
-            return new List<DiskSpace>();
         }
 
-        private IEnumerable<DiskSpace> GetFixedDisksFreeSpace()
+        private IEnumerable<string> GetFixedDisksRootPaths()
         {
-            return GetDiskSpace(_diskProvider.GetMounts().Where(d => d.DriveType == DriveType.Fixed).Select(d => d.RootDirectory), true);
+            return _diskProvider.GetMounts()
+                .Where(d => d.DriveType == DriveType.Fixed)
+                .Where(d => !_regexSpecialDrive.IsMatch(d.RootDirectory))
+                .Select(d => d.RootDirectory);
         }
 
         private IEnumerable<DiskSpace> GetDiskSpace(IEnumerable<string> paths, bool suppressWarnings = false)

src/NzbDrone.Mono/Disk/ProcMount.cs

@@ -45,7 +45,7 @@ namespace NzbDrone.Mono.Disk
         {
             get
             {
-                if (VolumeLabel.IsNullOrWhiteSpace() || VolumeLabel.StartsWith("UUID="))
+                if (VolumeLabel.IsNullOrWhiteSpace() || VolumeLabel.StartsWith("UUID=") || Name == VolumeLabel)
                 {
                     return Name;
                 }