eSpeed, 9/11 The company arguably hardest-hit in the 9/11 terrorist attacks was the Cantor-Fitzgerald family of companies.  For more on the story of this company’s tragic losses and their courageous recovery, see http://www.espeed.com/ and follow the links under “Our Story” and “View Our Stories”. Summary This article has described the concepts of disaster tolerance and disaster recovery and the components available for designing, configuring, and managing a disaster tolerant OpenVMS Cluster system.  Recommendations for setting quorum for a multi-site cluster system were given, and in-depth explanations of the volume shadowing algorithm and its implications for a disaster-tolerant configuration were presented.  Many management tools were presented, and the HP product and service offering, Disaster Tolerant Cluster Services (DTCS), was briefly described.   While disaster-tolerant configurations share many similarities, by their very nature, they are complex configurations that require a high level of expertise to plan, configure, and maintain.  HP offers the software, services, and tools to create and maintain these configurations. Keith Parris Web:  http://encompasserve.org/~parris/ and http://www.geocities.com/keithparris/ [an error occurred while processing this directive]