Release 0.4

Author: extratype

README.md

@@ -27,7 +27,7 @@ I'm not responsible for the data stored using chunkdisk!
 
 * MAKE A BACKUP of `.chunkdisk` file. Chunkdisk reads it only once when it's mounted. It can be read, modified and even deleted by others while the disk is mounted.
 * DO NOT add, remove and move around chunk files when the disk is mounted. Doing so confuses chunkdisk and causes I/O errors.
-* Chunks in use (or recently used) are write-protected. You may read chunks anytime (may not be up to date), but you SHOULD NOT modify them directly when the disk is mounted.
+* DO NOT directly modify chunk files. They are NOT write-protected even when being used.
 
 ## `.chunkdisk` File Specs
 
@@ -40,12 +40,12 @@ I'm not responsible for the data stored using chunkdisk!
 ```
 
 * UTF-8 encoding
-* Disk size and chunk size must be a multiple of 512.
+* Disk size and chunk size must be a multiple of 4096.
 * The sum of max. number of chunks must be at least (Disk size) / (Chunk size) + surplus (0 ~ 1).
 
 ## Issues
 
-* I/O is single-threaded due to [the WinSpd issue](https://github.com/billziss-gh/winspd/issues/10). The performance would be fine except for multi-threaded random I/Os with NVMe SSDs.
+* Random I/O performance is not great with SSDs.
 
 ## Notes and Tips
 

chunkdisk.cpp

@@ -16,6 +16,7 @@
  * TRIM (Unmap): make chunk empty if whole, fill zero otherwise
  * TODO: check partition -> TRIM -> shrink -> delete orphan empty chunks
  * TODO: sparse chunk
+ * TODO: asynchronous (overlapped) file operations
  */
 
 #include <type_traits>
@@ -1634,7 +1635,7 @@ static void BufferFree(PVOID Pointer)
 static DWORD CreateChunkDiskStorageUnit(ChunkDisk* cdisk, BOOLEAN write_protected, PWSTR pipe_name)
 {
     const wchar_t ProductId[] = L"ChunkDisk";
-    const wchar_t ProductRevision[] = L"0.1";
+    const wchar_t ProductRevision[] = L"0.4";
     SPD_STORAGE_UNIT_PARAMS unit_params;
 
     memset(&unit_params, 0, sizeof unit_params);

chunkdisk.rc

@@ -1,8 +1,8 @@
 #include <winver.h>
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 0,3,0,0
- PRODUCTVERSION 0,3,0,0
+ FILEVERSION 0,4,0,0
+ PRODUCTVERSION 0,4,0,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -18,12 +18,12 @@ BEGIN
         BLOCK "040904b0"
         BEGIN
             VALUE "FileDescription", "chunkdisk"
-            VALUE "FileVersion", "0.3.0.0"
+            VALUE "FileVersion", "0.4.0.0"
             VALUE "InternalName", "chunkdisk.exe"
             VALUE "LegalCopyright", "Copyright (C) 2021 extratype"
             VALUE "OriginalFilename", "chunkdisk.exe"
             VALUE "ProductName", "chunkdisk"
-            VALUE "ProductVersion", "0.3.0.0"
+            VALUE "ProductVersion", "0.4.0.0"
         END
     END
     BLOCK "VarFileInfo"