return evalDisks(disks, errs), err
}

// PutObjectPart - reads incoming stream and internally erasure codes
// them. This call is similar to single put operation but it is part
// of the multipart transaction.
//
// Implements S3 compatible Upload Part API.

	if err != nil {
		t.Fatal(err)
	}

	// Upload a part
	partData := bytes.Repeat([]byte("a"), 5*humanize.MiByte)
	md5Hex := getMD5Hash(partData)
	_, err = obj.PutObjectPart(ctx, bucket, object, res.UploadID, 1,
		mustGetPutObjReader(t, bytes.NewReader(partData), int64(len(partData)), md5Hex, ""),
		ObjectOptions{})
	if err != nil {
		t.Fatal(err)
	}

			HeadersRegexp(xhttp.AmzCopySource, ".*?(\\/|%2F).*?").
			HandlerFunc(s3APIMiddleware(api.CopyObjectPartHandler)).
			Queries("partNumber", "{partNumber:.*}", "uploadId", "{uploadId:.*}")
		// PutObjectPart
		router.Methods(http.MethodPut).Path("/{object:.+}").
			HandlerFunc(s3APIMiddleware(api.PutObjectPartHandler, traceHdrsS3HFlag)).
			Queries("partNumber", "{partNumber:.*}", "uploadId", "{uploadId:.*}")

		hr, err := hash.NewReader(ctx, io.LimitReader(gr, partInfo.Size), partInfo.Size, "", "", partInfo.Size)
		if err != nil {
			return setRestoreHeaderFn(oi, err)
		}
		pInfo, err := er.PutObjectPart(ctx, bucket, object, res.UploadID, partInfo.Number, NewPutObjReader(hr), ObjectOptions{})
		if err != nil {
			return setRestoreHeaderFn(oi, err)
		}
		if pInfo.Size != partInfo.Size {