diff --git a/service/lib/agama/storage/config_conversions/filesystem/from_json.rb b/service/lib/agama/storage/config_conversions/filesystem/from_json.rb
index ac637f2434..2e2d442595 100644
--- a/service/lib/agama/storage/config_conversions/filesystem/from_json.rb
+++ b/service/lib/agama/storage/config_conversions/filesystem/from_json.rb
@@ -21,6 +21,7 @@
 
 require "agama/storage/config_conversions/filesystem_type/from_json"
 require "agama/storage/configs/filesystem"
+require "y2storage/filesystems/mount_by_type"
 
 module Agama
   module Storage
@@ -41,12 +42,15 @@ def convert(default = nil)
             default_config = default.dup || Configs::Filesystem.new
 
             default_config.tap do |config|
+              mount_by = convert_mount_by
+              type = convert_type(config.type)
               label = filesystem_json[:label]
               mkfs_options = filesystem_json[:mkfsOptions]
 
               config.path = filesystem_json[:path]
               config.mount_options = filesystem_json[:mountOptions] || []
-              config.type = convert_type(config.type)
+              config.mount_by = mount_by if mount_by
+              config.type = type if type
               config.label = label if label
               config.mkfs_options = mkfs_options if mkfs_options
             end
@@ -57,10 +61,21 @@ def convert(default = nil)
           # @return [Hash]
           attr_reader :filesystem_json
 
-          # @param default [Configs::Filesystem, nil]
-          # @return [Configs::FilesystemType]
+          # @return [Y2Storage::Filesystems::MountByType, nil]
+          def convert_mount_by
+            value = filesystem_json[:mountBy]
+            return unless value
+
+            Y2Storage::Filesystems::MountByType.find(value.to_sym)
+          end
+
+          # @param default [Configs::FilesystemType, nil]
+          # @return [Configs::FilesystemType, nil]
           def convert_type(default = nil)
-            FilesystemType::FromJSON.new(filesystem_json[:type]).convert(default)
+            filesystem_type_json = filesystem_json[:type]
+            return unless filesystem_type_json
+
+            FilesystemType::FromJSON.new(filesystem_type_json).convert(default)
           end
         end
       end
diff --git a/service/lib/agama/storage/config_conversions/filesystem_type/from_json.rb b/service/lib/agama/storage/config_conversions/filesystem_type/from_json.rb
index 5df77eb2d9..960838f84c 100644
--- a/service/lib/agama/storage/config_conversions/filesystem_type/from_json.rb
+++ b/service/lib/agama/storage/config_conversions/filesystem_type/from_json.rb
@@ -27,48 +27,45 @@ module Agama
   module Storage
     module ConfigConversions
       module FilesystemType
-        # Filesystem conversion from JSON hash according to schema.
+        # Filesystem type conversion from JSON hash according to schema.
         class FromJSON
-          # @param filesystem_json [Hash, String, nil]
-          def initialize(filesystem_json)
-            @filesystem_json = filesystem_json
+          # @param filesystem_type_json [Hash, String]
+          def initialize(filesystem_type_json)
+            @filesystem_type_json = filesystem_type_json
           end
 
           # Performs the conversion from Hash according to the JSON schema.
           #
-          # @param default [Configs::Filesystem, nil]
-          # @return [Configs::Filesystem]
+          # @param default [Configs::FilesystemType, nil]
+          # @return [Configs::FilesystemType]
           def convert(default = nil)
             default_config = default.dup || Configs::FilesystemType.new
 
             default_config.tap do |config|
               btrfs = convert_btrfs(config.btrfs)
-              type = convert_type
 
-              config.fs_type = type if type
+              config.fs_type = convert_type
               config.btrfs = btrfs if btrfs
             end
           end
 
         private
 
-          # @return [Hash]
-          attr_reader :filesystem_json
+          # @return [Hash, String]
+          attr_reader :filesystem_type_json
 
           # @return [Y2Storage::Filesystems::Type]
           def convert_type
-            return if filesystem_json.nil?
-
-            value = filesystem_json.is_a?(String) ? filesystem_json : "btrfs"
+            value = filesystem_type_json.is_a?(String) ? filesystem_type_json : "btrfs"
             Y2Storage::Filesystems::Type.find(value.to_sym)
           end
 
-          # @param default [Configs::Btrfs]
+          # @param default [Configs::Btrfs, nil]
           # @return [Configs::Btrfs, nil]
           def convert_btrfs(default = nil)
-            return if filesystem_json.nil? || filesystem_json.is_a?(String)
+            return if filesystem_type_json.nil? || filesystem_type_json.is_a?(String)
 
-            btrfs_json = filesystem_json[:btrfs]
+            btrfs_json = filesystem_type_json[:btrfs]
             default_config = default.dup || Configs::Btrfs.new
 
             default_config.tap do |config|
diff --git a/service/lib/agama/storage/configs/filesystem_type.rb b/service/lib/agama/storage/configs/filesystem_type.rb
index 6895f4e26e..d9ef3cddf1 100644
--- a/service/lib/agama/storage/configs/filesystem_type.rb
+++ b/service/lib/agama/storage/configs/filesystem_type.rb
@@ -23,7 +23,7 @@ module Agama
   module Storage
     module Configs
       class FilesystemType
-        # @return [Y2Storage::Filesystems::Type]
+        # @return [Y2Storage::Filesystems::Type, nil]
         attr_accessor :fs_type
 
         # @return [Configs::Btrfs, nil]
diff --git a/service/test/agama/storage/config_conversions/from_json_test.rb b/service/test/agama/storage/config_conversions/from_json_test.rb
index c648874d6d..a5204cce91 100644
--- a/service/test/agama/storage/config_conversions/from_json_test.rb
+++ b/service/test/agama/storage/config_conversions/from_json_test.rb
@@ -20,9 +20,11 @@
 # find current contact information at www.suse.com.
 
 require_relative "../../../test_helper"
-require "agama/storage/config_conversions/from_json"
 require "agama/config"
+require "agama/storage/config_conversions/from_json"
 require "y2storage/encryption_method"
+require "y2storage/filesystems/mount_by_type"
+require "y2storage/filesystems/type"
 require "y2storage/pbkd_function"
 
 describe Agama::Storage::ConfigConversions::FromJSON do
@@ -462,6 +464,28 @@
         }
       end
 
+      let(:filesystem) do
+        {
+          path:         "/",
+          type:         "xfs",
+          label:        "root",
+          mkfsOptions:  ["version=2"],
+          mountOptions: ["rw"],
+          mountBy:      "label"
+        }
+      end
+
+      it "uses the specified attributes" do
+        config = subject.convert
+        filesystem = config.drives.first.filesystem
+        expect(filesystem.path).to eq "/"
+        expect(filesystem.type.fs_type).to eq Y2Storage::Filesystems::Type::XFS
+        expect(filesystem.label).to eq "root"
+        expect(filesystem.mkfs_options).to eq ["version=2"]
+        expect(filesystem.mount_options).to eq ["rw"]
+        expect(filesystem.mount_by).to eq Y2Storage::Filesystems::MountByType::LABEL
+      end
+
       context "if the filesystem specification only contains a path" do
         let(:filesystem) { { path: "/" } }
 
@@ -490,6 +514,18 @@
           # expect(filesystem.type.btrfs.default_subvolume).to eq ""
           # expect(filesystem.type.btrfs.subvolumes.map(&:path)).to eq ["tmp"]
         end
+
+        context "and the default filesystem type is not btrfs" do
+          let(:filesystem) do
+            { path: "/home", type: { btrfs: { snapshots: false } } }
+          end
+
+          it "uses btrfs filesystem" do
+            config = subject.convert
+            filesystem = config.drives.first.filesystem
+            expect(filesystem.type.fs_type).to eq Y2Storage::Filesystems::Type::BTRFS
+          end
+        end
       end
     end