IOCTL_DISK_GET_CACHE_INFORMATION - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// ntdddisk.h

// CTL_CODE(0x0007, 0x035, METHOD_BUFFERED, FILE_READ_ACCESS)
#define IOCTL_DISK_GET_CACHE_INFORMATION 0x000740D4
View the official Windows Driver Kit DDI reference
// winioctl.h

// CTL_CODE(0x0007, 0x035, METHOD_BUFFERED, FILE_READ_ACCESS)
#define IOCTL_DISK_GET_CACHE_INFORMATION 0x000740D4
View the official Win32 API reference

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Windows Driver Kit DDI reference (ni-ntdddisk-ioctl_disk_get_cache_information)

IOCTL_DISK_GET_CACHE_INFORMATION IOCTL

Description

Returns disk cache configuration data.

Parameters

Major code

Input buffer

None.

Input buffer length

None.

Output buffer

The device driver returns the DISK_CACHE_INFORMATION in the buffer at Irp->AssociatedIrp.SystemBuffer.

Output buffer length

Parameters.DeviceIoControl.OutputBufferLength in the I/O stack location of the IRP indicates the size, in bytes, of the buffer made available to the driver, which must be >= sizeof(DISK_CACHE_INFORMATION). Otherwise, the driver returns with an error status of STATUS_BUFFER_TOO_SMALL.

Input/output buffer

Input/output buffer length

Status block

The Information field is set to the size of the block of status information being returned, sizeof(DISK_CACHE_INFORMATION). The Status field is set to STATUS_SUCCESS, or possibly to STATUS_DEVICE_NOT_READY, STATUS_BUFFER_TOO_SMALL, STATUS_INSUFFICIENT_RESOURCES, STATUS_IO_DEVICE_ERROR, or STATUS_NOT_SUPPORTED.

See also

DISK_CACHE_INFORMATION

View the official Windows Driver Kit DDI reference

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Win32 API reference (ni-winioctl-ioctl_disk_get_cache_information)

IOCTL_DISK_GET_CACHE_INFORMATION IOCTL

Description

Retrieves the disk cache configuration data.

To perform this operation, call the DeviceIoControl function with the following parameters.

BOOL DeviceIoControl(
  (HANDLE) hDevice,                 // handle to device
  IOCTL_DISK_GET_CACHE_INFORMATION, // dwIoControlCode
  NULL,                             // lpInBuffer
  0,                                // nInBufferSize
  (LPVOID) lpOutBuffer,             // output buffer
  (DWORD) nOutBufferSize,           // size of output buffer
  (LPDWORD) lpBytesReturned,        // number of bytes returned
  (LPOVERLAPPED) lpOverlapped       // OVERLAPPED structure
);

Parameters

Input buffer

Input buffer length

Output buffer

Output buffer length

Input/output buffer

Input/output buffer length

Status block

Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful.

Otherwise, Status to the appropriate error condition as a NTSTATUS code.

For more information, see NTSTATUS Values.

Remarks

To set the disk cache information, use the IOCTL_DISK_SET_CACHE_INFORMATION control code.

See also

View the official Win32 API reference

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