try {
                    h.send(seekReq, seekResp);
                    if (log.isDebugEnabled() && seekResp.getOffset() != fileSize) {
                        log.debug(String.format("Open returned wrong size %d != %d", fileSize, seekResp.getOffset()));
                    }
                    fileSize = seekResp.getOffset();
                } catch (final Exception e) {
                    log.debug("Seek failed", e);

	blockSizeStr := r.Form.Get("blocksize")
	fileSizeStr := r.Form.Get("filesize")

	blockSize, err := strconv.ParseUint(blockSizeStr, 10, 64)
	if err != nil {
		blockSize = 4 * humanize.MiByte // default value
	}

	fileSize, err := strconv.ParseUint(fileSizeStr, 10, 64)
	if err != nil {
		fileSize = 1 * humanize.GiByte // default value
	}

	opts := madmin.DriveSpeedTestOpts{