}
//to be utilized by the lock algorithm
private LinkedList<LinkedList<String>> listQuorum(DepSkySDataUnit reg, String prefix) throws Exception{
CloudRepliesControlSet rcs = null;
try{
int seq = getNextSequence();
rcs = new CloudRepliesControlSet(N, seq);
replies.put(seq, rcs);
for (int i = 0; i < drivers.length; i++) {
CloudRequest r = new CloudRequest(DepSkySCloudManager.LIST, seq,
drivers[i].getSessionKey(), reg.getContainerName(), prefix,