diff --git a/Include/Aurora/IO/IAsyncTransaction.hpp b/Include/Aurora/IO/IAsyncTransaction.hpp
index 5315dd98..c647a0a9 100644
--- a/Include/Aurora/IO/IAsyncTransaction.hpp
+++ b/Include/Aurora/IO/IAsyncTransaction.hpp
@@ -71,6 +71,8 @@ namespace Aurora::IO
         */
         virtual void Reset() = 0;
 
+        virtual void SetBaseOffset(AuUInt64 uBaseOffset) = 0;
+
         AURT_ADD_USR_DATA;
     };
 }
\ No newline at end of file
diff --git a/Source/IO/FS/Async.Linux.cpp b/Source/IO/FS/Async.Linux.cpp
index 98c21503..3f77122a 100644
--- a/Source/IO/FS/Async.Linux.cpp
+++ b/Source/IO/FS/Async.Linux.cpp
@@ -249,6 +249,11 @@ namespace Aurora::IO::FS
         return bool(this->loopSource_);
     }
 
+    void LinuxAsyncFileTransaction::SetBaseOffset(AuUInt64 uBaseOffset)
+    {
+        this->uBaseOffset = uBaseOffset;
+    }
+
     bool LinuxAsyncFileTransaction::StartRead(AuUInt64 offset, const AuSPtr<AuMemoryViewWrite> &memoryView)
     {
         if (HasState())
@@ -296,6 +301,8 @@ namespace Aurora::IO::FS
                 return true;
             }
         }
+
+        offset += this->uBaseOffset;
         
         if (!UNIX::LinuxOverlappedSubmitRead(fd, offset, this, this->loopSource_.get(), bool(this->handle_->pIPCPipe)))
         {
@@ -351,6 +358,8 @@ namespace Aurora::IO::FS
         LIOS_Init(AuSharedFromThis());
         SetMemory(memoryView);
 
+        offset += this->uBaseOffset;
+
         if (!UNIX::LinuxOverlappedSubmitWrite(fd, offset, this, this->loopSource_.get()))
         {
             LIOS_SendProcess(0, true, errno);
diff --git a/Source/IO/FS/Async.Linux.hpp b/Source/IO/FS/Async.Linux.hpp
index 82cd251e..332baed5 100644
--- a/Source/IO/FS/Async.Linux.hpp
+++ b/Source/IO/FS/Async.Linux.hpp
@@ -77,11 +77,15 @@ namespace Aurora::IO::FS
         void DispatchCb();
         AuSPtr<FileHandle> GetFileHandle();
 
+        void SetBaseOffset(AuUInt64 uBaseOffset) override;
+
         virtual void LIOS_Process(AuUInt32 read, bool failure, int err, bool mark) override;
 
     private:
         AuSPtr<FileHandle> handle_;
-        AuUInt32 lastAbstractOffset_ {}, lastFinishedStat_{};
+        AuUInt64 lastAbstractOffset_ {};
+        AuUInt32 lastFinishedStat_ {};
+        AuUInt64 uBaseOffset {};
         bool latch_ {};
         bool bTxFinished_ {};
         AuSPtr<IAsyncFinishedSubscriber> sub_;
diff --git a/Source/IO/FS/Async.NT.cpp b/Source/IO/FS/Async.NT.cpp
index 6b0c3231..3856711d 100644
--- a/Source/IO/FS/Async.NT.cpp
+++ b/Source/IO/FS/Async.NT.cpp
@@ -345,10 +345,13 @@ namespace Aurora::IO::FS
         this->bHasFailed = false;
        
         this->dwLastAbstractStat = memoryView->length;
-        this->dwLastAbstractOffset = offset;
+        this->qwLastAbstractOffset = offset;
         this->dwLastBytes = 0;
 
         this->ResetAIO();
+
+        offset += this->uBaseOffset;
+
         this->overlap.Offset     = AuBitsToLower(offset);
         this->overlap.OffsetHigh = AuBitsToHigher(offset);
        
@@ -398,9 +401,12 @@ namespace Aurora::IO::FS
         this->pMemoryHold = memoryView;
         this->dwLastBytes = 0;
         this->dwLastAbstractStat   = memoryView->length;
-        this->dwLastAbstractOffset = offset;
+        this->qwLastAbstractOffset = offset;
 
         this->ResetAIO();
+
+        offset += this->uBaseOffset;
+
         this->overlap.Offset     = AuBitsToLower(offset);
         this->overlap.OffsetHigh = AuBitsToHigher(offset);
         auto ret = ::WriteFileEx((HANDLE)optWrite.value(), memoryView->ptr, memoryView->length, &this->overlap, FileOperationCompletion);
@@ -421,7 +427,7 @@ namespace Aurora::IO::FS
 
         if (this->pSub_)
         {
-            this->pSub_->OnAsyncFileOpFinished(this->dwLastAbstractOffset, read);
+            this->pSub_->OnAsyncFileOpFinished(this->qwLastAbstractOffset, read);
         }
     }
 
@@ -543,6 +549,11 @@ namespace Aurora::IO::FS
         this->pSub_ = sub;
     }
     
+    void NtAsyncFileTransaction::SetBaseOffset(AuUInt64 uBaseOffset)
+    {
+        this->uBaseOffset = uBaseOffset;
+    }
+
     bool NtAsyncFileTransaction::Wait(AuUInt32 timeout) 
     {
         if (this->bLatch)
diff --git a/Source/IO/FS/Async.NT.hpp b/Source/IO/FS/Async.NT.hpp
index b9a48389..6fea4bec 100644
--- a/Source/IO/FS/Async.NT.hpp
+++ b/Source/IO/FS/Async.NT.hpp
@@ -54,6 +54,8 @@ namespace Aurora::IO::FS
 
         void SetCallback(const AuSPtr<IAsyncFinishedSubscriber> &sub) override;
 
+        void SetBaseOffset(AuUInt64 uBaseOffset) override;
+
         bool Wait(AuUInt32 timeout) override;
         AuSPtr<AuLoop::ILoopSource> NewLoopSource() override;
 
@@ -68,12 +70,13 @@ namespace Aurora::IO::FS
         OVERLAPPED overlap {};
         HANDLE   event = INVALID_HANDLE_VALUE;
         AuSPtr<NtAsyncFileTransaction> pPin;
-        AuUInt32 dwLastAbstractStat {},
-                 dwLastAbstractOffset {};
+        AuUInt32 dwLastAbstractStat {};
+        AuUInt64 qwLastAbstractOffset {};
         bool     bLatch {};
         AuUInt32 dwLastBytes {};
         AuUInt32 dwOsErrorCode {};
         bool     bHasFailed {};
+        AuUInt64 uBaseOffset {};
 
         AuWPtr<Aurora::IO::IPC::IPCPipeImpl> pNtIpcPipeImpl;
         AuSPtr<void>       pMemoryHold;
diff --git a/Source/IO/Net/AuNetStream.Linux.cpp b/Source/IO/Net/AuNetStream.Linux.cpp
index 01344626..f740c8da 100644
--- a/Source/IO/Net/AuNetStream.Linux.cpp
+++ b/Source/IO/Net/AuNetStream.Linux.cpp
@@ -206,6 +206,11 @@ namespace Aurora::IO::Net
         return false;
     }
 
+    void LinuxAsyncNetworkTransaction::SetBaseOffset(AuUInt64 uBaseOffset)
+    {
+
+    }
+
     bool     LinuxAsyncNetworkTransaction::Complete()
     {
         return this->bLatch;
diff --git a/Source/IO/Net/AuNetStream.Linux.hpp b/Source/IO/Net/AuNetStream.Linux.hpp
index 75d51386..ca49bca5 100644
--- a/Source/IO/Net/AuNetStream.Linux.hpp
+++ b/Source/IO/Net/AuNetStream.Linux.hpp
@@ -42,6 +42,8 @@ namespace Aurora::IO::Net
 
         void Reset() override;
 
+        void SetBaseOffset(AuUInt64 uBaseOffset) override;
+
         virtual void LIOS_Process(AuUInt32 read, bool failure, int err, bool mark) override;
 
         void MakeSyncable();
diff --git a/Source/IO/Net/AuNetStream.NT.cpp b/Source/IO/Net/AuNetStream.NT.cpp
index 3998ab2d..d6765d76 100644
--- a/Source/IO/Net/AuNetStream.NT.cpp
+++ b/Source/IO/Net/AuNetStream.NT.cpp
@@ -387,6 +387,11 @@ namespace Aurora::IO::Net
         return this->pWaitable;
     }
 
+    void NtAsyncNetworkTransaction::SetBaseOffset(AuUInt64 uBaseOffset)
+    {
+
+    }
+
     void NtAsyncNetworkTransaction::Reset()
     {
         if (this->dwLastAbstractStat)
diff --git a/Source/IO/Net/AuNetStream.NT.hpp b/Source/IO/Net/AuNetStream.NT.hpp
index 13a664e8..9b0950b1 100644
--- a/Source/IO/Net/AuNetStream.NT.hpp
+++ b/Source/IO/Net/AuNetStream.NT.hpp
@@ -39,6 +39,8 @@ namespace Aurora::IO::Net
         bool Wait(AuUInt32 timeout) override;
         AuSPtr<AuLoop::ILoopSource> NewLoopSource() override;
 
+        void SetBaseOffset(AuUInt64 uBaseOffset) override;
+
         void Reset();
 
         void MakeSyncable();