diff --git a/plugins/disk-mount/diskcontrolitem.cpp b/plugins/disk-mount/diskcontrolitem.cpp
index 38243334b..95d04c0e9 100644
--- a/plugins/disk-mount/diskcontrolitem.cpp
+++ b/plugins/disk-mount/diskcontrolitem.cpp
@@ -8,6 +8,8 @@ DWIDGET_USE_NAMESPACE
 DiskControlItem::DiskControlItem(const DiskInfo &info, QWidget *parent)
     : QWidget(parent),
 
+      m_unknowIcon(":/icons/resources/unknow.svg"),
+
       m_diskIcon(new QLabel),
       m_diskName(new QLabel),
       m_diskCapacity(new QLabel),
@@ -39,7 +41,7 @@ DiskControlItem::DiskControlItem(const DiskInfo &info, QWidget *parent)
     infoLayout->addWidget(m_diskName);
     infoLayout->addWidget(m_diskCapacity);
     infoLayout->setSpacing(0);
-    infoLayout->setMargin(0);
+    infoLayout->setContentsMargins(3, 7, 0, 7);
 
     QHBoxLayout *unmountLayout = new QHBoxLayout;
     unmountLayout->addLayout(infoLayout);
@@ -51,7 +53,7 @@ DiskControlItem::DiskControlItem(const DiskInfo &info, QWidget *parent)
     progressLayout->addLayout(unmountLayout);
     progressLayout->addWidget(m_capacityValueBar);
     progressLayout->setSpacing(0);
-    progressLayout->setMargin(0);
+    progressLayout->setContentsMargins(10, 0, 0, 0);
 
     QHBoxLayout *centeralLayout = new QHBoxLayout;
     centeralLayout->addWidget(m_diskIcon);
@@ -70,11 +72,17 @@ void DiskControlItem::updateInfo(const DiskInfo &info)
 {
     m_info = info;
 
-    m_diskIcon->setPixmap(QIcon::fromTheme(info.m_icon).pixmap(32, 32));
-    m_diskName->setText(info.m_name);
-    m_diskCapacity->setText(QString("%1/%2").arg(formatDiskSize(info.m_usedSize)).arg(formatDiskSize(info.m_totalSize)));
+    m_diskIcon->setPixmap(QIcon::fromTheme(info.m_icon, m_unknowIcon).pixmap(32, 32));
+    if (!info.m_name.isEmpty())
+        m_diskName->setText(info.m_name);
+    else
+        m_diskName->setText(tr("Unknown device"));
+    if (info.m_totalSize)
+        m_diskCapacity->setText(QString("%1/%2").arg(formatDiskSize(info.m_usedSize)).arg(formatDiskSize(info.m_totalSize)));
+    else
+        m_diskCapacity->clear();
     m_capacityValueBar->setMinimum(0);
-    m_capacityValueBar->setMaximum(info.m_totalSize);
+    m_capacityValueBar->setMaximum(std::max(1ull, info.m_totalSize));
     m_capacityValueBar->setValue(info.m_usedSize);
 }
 
diff --git a/plugins/disk-mount/diskcontrolitem.h b/plugins/disk-mount/diskcontrolitem.h
index c2bd17d68..ed91e46b8 100644
--- a/plugins/disk-mount/diskcontrolitem.h
+++ b/plugins/disk-mount/diskcontrolitem.h
@@ -8,6 +8,7 @@
 #include <QWidget>
 #include <QLabel>
 #include <QProgressBar>
+#include <QIcon>
 
 class DiskControlItem : public QWidget
 {
@@ -25,6 +26,7 @@ private slots:
 
 private:
     DiskInfo m_info;
+    QIcon m_unknowIcon;
 
     QLabel *m_diskIcon;
     QLabel *m_diskName;
diff --git a/plugins/disk-mount/resources.qrc b/plugins/disk-mount/resources.qrc
index 33c6c2d3c..c7905b653 100644
--- a/plugins/disk-mount/resources.qrc
+++ b/plugins/disk-mount/resources.qrc
@@ -5,5 +5,6 @@
         <file>resources/unmount-press.png</file>
         <file>resources/unmount-normal.png</file>
         <file>resources/unmount-hover.png</file>
+        <file>resources/unknow.svg</file>
     </qresource>
 </RCC>
diff --git a/plugins/disk-mount/resources/unknow.svg b/plugins/disk-mount/resources/unknow.svg
new file mode 100644
index 000000000..952b644bf
--- /dev/null
+++ b/plugins/disk-mount/resources/unknow.svg
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg width="48px" height="48px" viewBox="0 0 48 48" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <!-- Generator: Sketch 3.8.3 (29802) - http://www.bohemiancoding.com/sketch -->
+    <title>磁盘挂载-48px</title>
+    <desc>Created with Sketch.</desc>
+    <defs>
+        <path d="M21,42 C32.5979797,42 42,32.5979797 42,21 C42,9.40202025 32.5979797,0 21,0 C9.40202025,0 0,9.40202025 0,21 C0,32.5979797 9.40202025,42 21,42 Z" id="path-1"></path>
+        <filter x="-50%" y="-50%" width="200%" height="200%" filterUnits="objectBoundingBox" id="filter-2">
+            <feOffset dx="0" dy="1" in="SourceAlpha" result="shadowOffsetOuter1"></feOffset>
+            <feGaussianBlur stdDeviation="1" in="shadowOffsetOuter1" result="shadowBlurOuter1"></feGaussianBlur>
+            <feColorMatrix values="0 0 0 0 0   0 0 0 0 0   0 0 0 0 0  0 0 0 0.2 0" type="matrix" in="shadowBlurOuter1"></feColorMatrix>
+        </filter>
+    </defs>
+    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <g id="磁盘挂载-48px">
+            <rect id="Rectangle-33" opacity="0.623717351" x="0" y="0" width="48" height="48"></rect>
+            <g id="Group-18" transform="translate(3.000000, 3.000000)">
+                <g id="Oval-31">
+                    <use fill="black" fill-opacity="1" filter="url(#filter-2)" xlink:href="#path-1"></use>
+                    <use fill="#FF6932" fill-rule="evenodd" xlink:href="#path-1"></use>
+                </g>
+                <path d="M27.2564016,0.947743843 C25.2802948,0.331841898 23.1789003,0 21,0 C9.40202025,0 0,9.40202025 0,21 C0,25.6657423 1.52159116,29.9760978 4.09562199,33.4619153 L27.2564016,0.947743843 L27.2564016,0.947743843 Z" id="Combined-Shape" fill="#FFF357" opacity="0.29973181"></path>
+                <path d="M14.7998047,0.947743843 C16.7759115,0.331841898 18.877306,0 21.0562063,0 C32.6541861,0 42.0562063,9.40202025 42.0562063,21 C42.0562063,25.6657423 40.5346152,29.9760978 37.9605843,33.4619153 L14.7998047,0.947743843 L14.7998047,0.947743843 Z" id="Combined-Shape" fill="#FFF357" opacity="0.29973181"></path>
+                <path d="M21.0534566,9.80754157 L29.6091717,21.5854251 C30.5822675,22.9249986 30.0336876,24.0109375 28.3719359,24.0109375 L13.7444081,24.0109374 C12.0880058,24.0109374 11.5369797,22.9200048 12.5055618,21.5854251 L21.0534566,9.80754157 Z M11,28 C11,27.4477153 11.4553056,27 11.9918031,27 L30.0081969,27 C30.5559546,27 31,27.4438648 31,28 C31,28.5522847 30.5446944,29 30.0081969,29 L11.9918031,29 C11.4440454,29 11,28.5561352 11,28 Z" id="Combined-Shape" fill="#FFFFFF"></path>
+            </g>
+        </g>
+    </g>
+</svg>
\ No newline at end of file