"checkpoint directory does not exist or is not accessible.");
case NOT_FORMATTED:
// for backup node all directories may be unformatted initially
LOG.info("Storage directory " + sd.getRoot() + " is not formatted.");
LOG.info("Formatting ...");
sd.clearDirectory(); // create empty current
break;
case NORMAL:
break;
default: // recovery is possible
sd.doRecover(curState);