Autonomic recovery of PPRC errors detected by PPRC peer

A data storage system coupled to a host computer comprising:

• a first peer data storage facility;
• a second peer data storage facility communicating with the first peer data storage facility by a first communication link;
• means for storing data from the host computer by a first write operation to the first peer data storage facility;
• means for executing a second write operation to copy the stored data over the first communication link from the first peer data storage facility to the second peer data storage facility;
• monitoring apparatus associated with the second peer data storage facility to determine if the data associated with the second write operation contains an error;
• and
• means responsive to the monitoring apparatus for instructing the first peer data storage facility to initiate a first error recovery operation on the first peer data storage facility upon detection of an error,
• means for the second peer data storage facility to direct the first peer data storage facility to store a first root cause data set upon instruction to initiate the first error recover operation;
• wherein the first root cause data set comprises a record of the state of the first peer data storage facility at the time of the determination of the error and a continuous event log buffer.

An article of manufacture for use in programming a data storage system to initiate a data recovery process, the data storage 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 first communication link and the article of manufacture comprising a storage medium having logic embedded therein to cause components of the data storage system to:

• execute a first write operation to store data from a host computer to the first peer data storage facility;
• execute a second write operation to copy the stored data over the first communication link from the first peer data storage facility to the second peer data storage facility;
• monitor the data associated with the second write operation to determine if the data contains an error;
• and
• instruct the first peer data storage facility to initiate a first error recovery operation on the first peer data storage facility upon detection of the error,
• wherein the logic further causes the second peer data storage facility to direct the first peer data storage facility to store a first root cause data set upon instruction to initiate the first error recovery process;
• wherein the first root cause data set comprises a record of the state of the first peer data storage facility at the time of the determination of the error and a continuous event log buffer.