writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidPart), r.URL)
		return
	}

	// maximum size for multipart objects in a single operation
	if isMaxObjectSize(size) {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrEntityTooLarge), r.URL)
		return
	}

	// check partID with maximum part ID for multipart objects
	if isMaxPartID(partID) {

	Speedtest bool // object call specifically meant for SpeedTest code, set to 'true' when invoked by SpeedtestHandler.

	// Use the maximum parity (N/2), used when saving server configuration files
	MaxParity bool

	// Provides a per object encryption function, allowing metadata encryption.
	EncryptFn objectMetaEncryptFn

		reqInfo.BucketName = srcBucket
		reqInfo.ObjectName = srcObject
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}
	defer gr.Close()
	srcInfo := gr.ObjInfo

	// maximum Upload size for object in a single CopyObject operation.
	if isMaxObjectSize(srcInfo.Size) {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrEntityTooLarge), r.URL)
		return
	}