Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
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) |