'Returns the scvolume associated with provider_id.
:param provider_id: This is the instanceId
:return: Dell SCVolume object.'

def get_volume(self, provider_id):

    result = None
    if provider_id:
        r = self.client.get(('StorageCenter/ScVolume/%s' % provider_id))
        if self._check_result(r):
            result = self._get_json(r)
    return result
