mydisktool enhanced raw disk tool

[#1]

In our daily work as a FAE (Field Application Engineer), we need to read and write to SD cards, and often this requires working under Windows. The Win32 Disk Imager tool provides this functionality, but it cannot specify a particular offset or dump a mirror based on the disk partition size. After dumping the disk mirror, if it's a GPT (Global Point of View) system, we also need to repair the backup GPT table. This prompted me to write  dedicated tools.

I'm currently using the tools myself and hope to share them to bring some convenience to the daily work.

It's recommended to place the tools in the Windows path, so it can be run from anywhere.

 

1. RawDisk Menu Tool

Author: Biyong SUN
Version: 1.0.6

Introduction:
RawDisk Menu Tool is an advanced Windows utility for low-level disk operations on removable drives (such as SD cards and USB drives). Unlike traditional tools like Win32 Disk Imager, which can only write from offset 0 and dump the entire disk, RawDisk Menu offers fine-grained control over disk access:

Key Advantages Over Win32 Disk Imager

• Flexible Offsets:

  • Win32 Disk Imager is limited to starting at offset 0.
  • RawDisk Menu allows reading or writing from any offset, making it ideal for partial backups or targeted restoration.

• Custom Lengths:

  • Win32 Disk Imager always processes the entire disk.
  • RawDisk Menu lets you specify length, so you can copy only the required portion (e.g., a single partition).

• Block Size Control:

  • Supports configurable block sizes (up to 50 MB), enabling performance tuning for large transfers.

• Dry-Run Mode:

  • Preview operations without modifying the disk—something Win32 Disk Imager does not offer.

• Partition Awareness:

  • Displays partition layout and disk metadata before performing operations.

• Safety Features:

  • Locks and dismounts volumes before writing to prevent corruption.
  • Confirms all parameters interactively.

Use Cases

• Backup only the boot sector or a specific partition.
• Restore a corrupted partition without overwriting the entire disk.
• Perform forensic analysis by reading selective disk regions.

Workflow Highlights:

• Enumerates removable disks under a configurable size limit (default: 128 GB).
• Interactive prompts for offset, length, block size, and file paths.
• Displays progress and previews data in hex/ASCII format for dry runs.

Feature	RawDisk Menu Tool	Win32 Disk Imager
Platform	Windows	Windows
Read Disk to Image	Yes (supports partial reads)	Yes (entire disk only)
Write Image to Disk	Yes (supports partial writes)	Yes (entire disk only)
Offset Control	Any offset (customizable)	Fixed at 0
Length Control	Custom length (partial disk or partition)	Entire disk only
Block Size Control	Configurable (up to 50 MB, multiple of 512)	Fixed (no user control)
Dry-Run Mode	Yes (preview without writing)	No
Partition Awareness	Displays partition layout and metadata	No
Disk Size Limit	Configurable (default 128 GB)	No limit (but entire disk only)
Safety Features	Locks/dismounts volumes before write	No
Progress Display	Yes (with percentage)	Yes
Hex/ASCII Preview	Yes (first 32 bytes in dry-run)	No
Use Case	Advanced: selective backup/restore, forensic work	Basic: full disk imaging only

2. Disk Mirror Tool 

Author: Biyong SUN
Version: 1.0.3
Purpose:
This tool is designed for analyzing and repairing disk image files, particularly focusing on partition structures and GPT (GUID Partition Table) integrity. Its main capabilities include:

• Partition Detection:

  • Reads and displays partition information for both MBR (Master Boot Record) and GPT partition styles.
  • Detects common filesystems such as NTFS, FAT32, exFAT, and EXT2/3/4 by inspecting sector signatures.

• GPT Backup Repair:

  • Fixes a common issue where the GPT backup header is missing or incorrectly positioned at the tail of the disk image.
  • Recalculates CRC32 checksums for GPT headers and partition entries to ensure consistency.

• Disk Information Display:

  • Shows disk size in human-readable format (bytes, KB, MB, GB).
  • Lists partitions with start/end offsets, size, and filesystem type.

Usage Highlights:

• -s or --show: Display disk info only.
• -f or --fix: Repair GPT backup and then display disk info.

[BiyongSUN]

This batch file can help you get the admin for this directory in the File Explorer address bar.

type cmda in the  File Explorer address bar.

C:\Windows\System32\cmda.bat

@echo off
:: Check for admin rights
net session >nul 2>&1
if %errorlevel% == 0 (
    echo Already running as administrator.
    cmd
    exit /b
) else (
    echo Requesting administrator privileges...
    powershell -Command "Start-Process cmd.exe -Verb runAs"
    exit /b
)
``