case "PendingSize":
			z.PendingSize, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "PendingSize")
				return
			}
		case "FailedSize":
			z.FailedSize, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "FailedSize")
				return
			}
		case "PendingCount":
			z.PendingCount, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "PendingCount")

	var written int64
	if odirectEnabled {
		written, err = xioutil.CopyAligned(diskHealthWriter(ctx, w), r, *bufp, fileSize, w)
	} else {
		written, err = io.CopyBuffer(diskHealthWriter(ctx, w), r, *bufp)
	}
	if err != nil {
		w.Close()
		return err
	}

	if written < fileSize && fileSize >= 0 {
		if truncate {
			w.Truncate(0) // zero-in the file size to indicate that its unreadable
		}

			z.ReplicatedSize, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "ReplicatedSize")
				return
			}
		case "FailedSize":
			z.FailedSize, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "FailedSize")
				return
			}
		case "FailedCount":
			z.FailedCount, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "FailedCount")

                    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 ( 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{