// ntddstor.h

// CTL_CODE(0x002d, 0x4f0, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS)
#define IOCTL_STORAGE_PROTOCOL_COMMAND 0x002DD3C0
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Windows Driver Kit DDI reference (ni-ntddstor-ioctl_storage_protocol_command)

IOCTL_STORAGE_PROTOCOL_COMMAND IOCTL

Description

A driver can use IOCTL_STORAGE_PROTOCOL_COMMAND to pass vendor-specific commands to a storage device.

Parameters

Major code

Input buffer

None.

Input buffer length

None.

Output buffer

The driver returns the results of the vendor-specific command to the buffer at Irp->AssociatedIrp.SystemBuffer. Cast the structure returned to a STORAGE_PROTOCOL_COMMAND and check its ReturnStatus field to determine the status of the command request.

Output buffer length

Parameters.DeviceIoControl.OutputBufferLength in the I/O stack location indicates the size, in bytes, of the parameter buffer, which must be >= sizeof(STORAGE_PROTOCOL_COMMAND).

Input/output buffer

Input/output buffer length

Status block

The Information field is set to the number of bytes returned. The Status field is set to STATUS_SUCCESS, or possibly to STATUS_INSUFFICIENT_RESOURCES.

IOCTL_STORAGE_PROTOCOL_COMMAND - NtDoc