我想使用vc ++中的ATA命令读取磁盘的特定扇区(MBR扇区)。我是VC ++的新手,因此在使用DeviceIoControl向磁盘发送命令时遇到了问题。我正在提供一个代码,用于使用命令读取扇区(0x20)读出扇区。
BOOL status = FALSE;
PATA_PASS_THROUGH_EX pATAData;
DWORD dataSize = sizeof(ATA_PASS_THROUGH_EX) + 512;
BYTE Buffer[sizeof(ATA_PASS_THROUGH_EX) + 512];
DWORD bytescopied = 0;
pATAData = (ATA_PASS_THROUGH_EX*)Buffer;
ZeroMemory(pATAData,dataSize); // clears the buffer
pATAData->Length = sizeof(ATA_PASS_THROUGH_EX);
pATAData->DataBufferOffset = sizeof(ATA_PASS_THROUGH_EX);
pATAData->DataTransferLength = 512;
pATAData->TimeOutValue = 2;
pATAData->CurrentTaskFile[1] = 0x01;
pATAData->CurrentTaskFile[2] = 0x00;
pATAData->CurrentTaskFile[3] = 0x00;
pATAData->CurrentTaskFile[4] = 0x00;
pATAData->AtaFlags =ATA_FLAGS_DATA_IN;
pATAData->CurrentTaskFile[6] = 0x20; // command Read Sector(s)(0x20)
/* sends the command to the device, **hDevice** is device handle*/
status = DeviceIoControl(hDevice, IOCTL_ATA_PASS_THROUGH, pATAData, dataSize,Buffer, dataSize, &bytescopied, NULL );
我不能低下这段代码中的错误以及我在这里缺少的内容,但是它不起作用。我在这里想念什么?如果PATA_PASS_THROUGH_EX结构的参数存在问题,请告诉如何读取第一个扇区(MBR)。
谢谢大家的帮助。我找到了解决方案。我没有注意到的一点东西。那就是阿塔旗。我必须发送多个标志。例如。
pATAData->ataFlags = ATA_FLAGS_48BIT_COMMAND | ATA_FLAGS_DRDY_REQUIRED | ATA_FLAGS_DATA_IN
并且还要在PreviousTaskFile [6]中发送ATA命令操作码。而要注意的几件事是HDD的块大小是多少?它可能超过512个字节,特别是如果它是一个大磁盘(如(1TB ... 4TB))。因此,您需要相应地调整大小。您可以通过执行EC Identification ATA命令来查看大小,然后查看生成的数据结构。
感谢您的帮助。我找到了解决方案。我没有在CurrentTaskFile中分配设备句柄。
pATAData->CurrentTaskFile[5] = (UCHAR)hDevice;
但是IDENTIFY_DEVICE(ECh)命令在没有此命令的情况下成功发送。我不知道这是对还是错,但这是可行的。
感谢大家的帮助。经过长时间的讨论,我发现我必须为大型磁盘发送扩展命令。但是现在我正在发送读取扇区Ext(0x24 oppcode)命令。
BOOL status = FALSE;
PATA_PASS_THROUGH_EX pATAData;
DWORD dataSize = sizeof(ATA_PASS_THROUGH_EX) + 512;
BYTE Buffer[sizeof(ATA_PASS_THROUGH_EX) + 512];
DWORD bytescopied = 0;
pATAData = (ATA_PASS_THROUGH_EX*)Buffer;
ZeroMemory(pATAData,dataSize); // clears the buffer
pATAData->Length = sizeof(ATA_PASS_THROUGH_EX);
pATAData->DataBufferOffset = sizeof(ATA_PASS_THROUGH_EX);
pATAData->DataTransferLength = 512;
pATAData->TimeOutValue = 2;
pATAData->CurrentTaskFile[0] = 0x00;
pATAData->CurrentTaskFile[1] = 0x01;
pATAData->CurrentTaskFile[2] = 0x01;
pATAData->CurrentTaskFile[3] = 0x00;
pATAData->CurrentTaskFile[4] = 0x00;
pATAData->CurrentTaskFile[5] = 0x40;
pATAData->CurrentTaskFile[7]= 0x00;
pATAData->AtaFlags =ATA_FLAGS_48BIT_COMMAND;
pATAData->PreviousTaskFile[0] = 0x00;
pATAData->PreviousTaskFile[1] = 0x00;
pATAData->PreviousTaskFile[2] = 0x00;
pATAData->PreviousTaskFile[3] = 0x00;
pATAData->PreviousTaskFile[4] = 0x00;
pATAData->PreviousTaskFile[5] = 0x04;
pATAData->PreviousTaskFile[7]= 0x00;
pATAData->CurrentTaskFile[6] = 0x24; // command Read Sector(s) Ext(0x24)
/* sends the command to the device, **hDevice** is device handle*/
status = DeviceIoControl(hDevice, IOCTL_ATA_PASS_THROUGH, pATAData, dataSize,Buffer, dataSize, &bytescopied, NULL );
但是这里是同样的问题。命令执行成功,但不读取任何扇区。我找不到任何错误。
我也遇到同样的问题。我正在尝试向SATA磁盘发出READ SECTOR命令。您可以分享您的解决方案吗?