func (z *DiskInfo) DecodeMsg(dc *msgp.Reader) (err error) {
	var zb0001 uint32
	zb0001, err = dc.ReadArrayHeader()
	if err != nil {
		err = msgp.WrapError(err)
		return
	}
	if zb0001 != 18 {
		err = msgp.ArrayError{Wanted: 18, Got: zb0001}
		return
	}
	z.Total, err = dc.ReadUint64()
	if err != nil {
		err = msgp.WrapError(err, "Total")
		return
	}
	z.Free, err = dc.ReadUint64()
	if err != nil {

			accessKey:            credentials.AccessKey,
			secretKey:            credentials.SecretKey,
			expectedRespStatus:   http.StatusOK,
		},
		// Test case - 18, copy metadata from newObject1 with null versionId
		18: {
			bucketName:         bucketName,
			newObjectName:      "newObject1",
			copySourceHeader:   url.QueryEscape(SlashSeparator+bucketName+SlashSeparator+objectName) + "?versionId=null",