38 lines
1.3 KiB
Python
38 lines
1.3 KiB
Python
def ReadDiskBytes(volume_letter: str, start_byte: int, length: int) -> bytes:
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"""
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从指定磁盘的指定起始位置读取指定长度的字节。
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:param volume_letter: 盘符（如 "Y"）
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:param start_byte: 起始字节位置（整数）
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:param length: 要读取的字节数（整数）
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:return: 读取到的原始字节数据（bytes）
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"""
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if not isinstance(volume_letter, str) or len(volume_letter.strip()) != 1:
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raise ValueError("drive_letter 必须是单个字母，如 'Y'")
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# 构建 Windows 设备路径格式：\\.\Y:
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disk_path = f"\\\\.\\{volume_letter.strip().upper()}:"
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try:
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with open(disk_path, "rb") as disk:
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disk.seek(start_byte)
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data = disk.read(length)
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return data
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except PermissionError:
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raise PermissionError("权限不足，请以管理员身份运行程序")
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except Exception as e:
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raise RuntimeError(f"读取磁盘失败：{e}")
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if __name__ == "__main__":
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drive = "Y"
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start = 687685632
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size = 7163904
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try:
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content = ReadDiskBytes(drive, start, size)
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print(f"成功读取 {len(content)} 字节内容。前100字节为：")
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print(content[:100])
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except Exception as e:
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print("错误：", e)
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