IOCTL_DISK_GET_CACHE_INFORMATION IOCTL (ntdddisk.h)
Returns disk cache configuration data.
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.
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.
Requirements
| Requirement | Value |
|---|---|
| Header | ntdddisk.h (include Ntdddisk.h) |