Abstract: A method for initiating a data storage facility recovery process in a data processing system having a first peer data storage facility and a second peer data storage facility communicating with the first peer data storage facility by a communication link. The method of initiating a recovery process is invoked by one peer data storage facility upon another peer data storage facility operating under a peer to peer remote copy (PPRC) protocol. Data copied from a first peer data storage facility to a second peer data storage facility is monitored for errors. Upon detection of an error by one peer data storage facility, recovery and data collection operations are initiated on the other peer data storage facility. Preferably, the initiation of recovery and data collection operations occurs out of band, over a second communication link between the peer data storage facilities.

Abstract: A process for preparing extrudates of alumina monohydrate having densities, surface areas and pore volumes within a predetermined range by mixing the alumina with a sufficient quantity of water to prepare an extrudable product and aging this product for a period of 1/2 to 6 hours. The alumina is then extruded and the extrudates dried using conventional techniques. The alumina is primarily used as a base for auto exhaust conversion catalysts.