diff --git a/src/core/lvmdevice.cpp b/src/core/lvmdevice.cpp
index 4bda317..91ca2be 100644
--- a/src/core/lvmdevice.cpp
+++ b/src/core/lvmdevice.cpp
@@ -198,7 +198,7 @@ Partition* LvmDevice::scanPartition(const QString& lvPath, PartitionTable* pTabl
 
 /** scan and contruct list of initialized LvmDevice objects.
  *
- *  @return list of initialized LvmDevice
+ *  @return list of initialized LvmDevices
  */
 QList<LvmDevice*> LvmDevice::scanSystemLVM()
 {
diff --git a/src/fs/luks.cpp b/src/fs/luks.cpp
index d35aca2..819cbcc 100644
--- a/src/fs/luks.cpp
+++ b/src/fs/luks.cpp
@@ -329,6 +329,7 @@ void luks::loadInnerFileSystem(const QString& mapperNode)
     setUUID(m_innerFs->readUUID(mapperNode));
     if (m_innerFs->supportGetUsed() == FileSystem::cmdSupportFileSystem)
         setSectorsUsed((m_innerFs->readUsedCapacity(mapperNode) + payloadOffset()) / m_logicalSectorSize );
+    m_innerFs->scan(mapperNode);
 }
 
 void luks::createInnerFileSystem(FileSystem::Type type)
diff --git a/src/fs/luks.h b/src/fs/luks.h
index a45b3fa..5b35f30 100644
--- a/src/fs/luks.h
+++ b/src/fs/luks.h
@@ -158,6 +158,8 @@ public:
     void getKeySize(const QString& deviceNode);
     void getPayloadOffset(const QString& deviceNode);
 
+    FileSystem* innerFS() const { return m_innerFs; }; // avoid calling this unless necessary
+
     QString mapperName() const { return m_MapperName; };
     QString cipherName() const { return m_CipherName; };
     QString cipherMode() const { return m_CipherMode; };
diff --git a/src/fs/lvm2_pv.cpp b/src/fs/lvm2_pv.cpp
index 9648cc3..38ab206 100644
--- a/src/fs/lvm2_pv.cpp
+++ b/src/fs/lvm2_pv.cpp
@@ -66,6 +66,11 @@ void lvm2_pv::init()
     m_Copy     = cmdSupportNone; // Copying PV can confuse LVM
 }
 
+void lvm2_pv::scan(const QString& deviceNode)
+{
+    getPESize(deviceNode);
+}
+
 bool lvm2_pv::supportToolFound() const
 {
     return
@@ -127,7 +132,7 @@ bool lvm2_pv::resize(Report& report, const QString& deviceNode, qint64 length) c
 
     qint64 lastPE = getTotalPE(deviceNode) - 1; // starts from 0
     if (lastPE > 0) { // make sure that the PV is already in a VG
-        qint64 targetPE = (length - metadataOffset) / getPESize(deviceNode) - 1; // starts from 0
+        qint64 targetPE = (length - metadataOffset) / peSize() - 1; // starts from 0
         if (targetPE < lastPE) { //shrinking FS
             qint64 firstMovedPE = qMax(targetPE + 1, getAllocatedPE(deviceNode)); // starts from 1
             ExternalCommand moveCmd(report,
@@ -275,10 +280,10 @@ qint64 lvm2_pv::getPVSize(const QStringList& deviceNodeList)
     return sum;
 }
 
-qint64 lvm2_pv::getPESize(const QString& deviceNode) const
+void lvm2_pv::getPESize(const QString& deviceNode)
 {
     QString val = getpvField(QStringLiteral("vg_extent_size"), deviceNode);
-    return val.isEmpty() ? -1 : val.toLongLong();
+    m_PESize = val.isEmpty() ? -1 : val.toLongLong();
 }
 
 /** Get pvs command output with field name
diff --git a/src/fs/lvm2_pv.h b/src/fs/lvm2_pv.h
index 8aaaa44..c0f1df5 100644
--- a/src/fs/lvm2_pv.h
+++ b/src/fs/lvm2_pv.h
@@ -42,6 +42,7 @@ public:
 
 public:
     void init() override;
+    void scan(const QString& deviceNode) override;
 
     qint64 readUsedCapacity(const QString& deviceNode) const override;
     bool check(Report& report, const QString& deviceNode) const override;
@@ -100,22 +101,22 @@ public:
     SupportTool supportToolName() const override;
     bool supportToolFound() const override;
 
+    static QString getpvField(const QString& fieldName, const QString& deviceNode = QString());
+
     static qint64 getTotalPE(const QString& deviceNode);
     static qint64 getTotalPE(const QStringList& deviceNodeList);
     static qint64 getFreePE(const QString& deviceNode);
     static qint64 getFreePE(const QStringList& deviceNodeList);
     static qint64 getAllocatedPE(const QString& deviceNode);
     static qint64 getAllocatedPE(const QStringList& deviceNodeList);
-    qint64 getPESize(const QString& deviceNode) const; // return PE size in bytes
+    void getPESize(const QString& deviceNode); // return PE size in bytes
     static qint64 getPVSize(const QString& deviceNode); // return PV size in bytes
     static qint64 getPVSize(const QStringList& deviceNodeList);
-
+    static QString getVGName(const QString& deviceNode);
+    static QStringList getFreePV();
     static bool isUsed(const QString& pvNode);
 
-    static QString getVGName(const QString& deviceNode);
-    static QString getpvField(const QString& fieldName, const QString& deviceNode = QString());
-
-    static QStringList getFreePV();
+    qint64 peSize() const { return m_PESize; };
 
 public:
     static CommandSupportType m_GetUsed;
@@ -131,6 +132,9 @@ public:
     static CommandSupportType m_UpdateUUID;
     static CommandSupportType m_GetUUID;
 
+private:
+    qint64 m_PESize;
+
 };
 }