Patent ID: 6044444
Filing Date: 2000-03-28
Classification: G06F

Abstract:
A data processing system comprising:a first data storage system;a second data storage system; anda data link coupled between said first data storage system and said second data storage system for transmission of remote copy data from said first data storage system to said second data storage system;wherein said first data storage system is operational in a remote copy mode in which data is stored in a primary volume of data storage in said first data storage system and is transmitted over said data link and stored in a respective secondary volume of data storage in said second data storage system; andsaid first data storage system includes a controller for detecting an occurrence of a disruption in operation of the data processing system preventing an access to said primary volume, and upon detecting said occurrence of said disruption in operation of the data processing system preventing said access to said primary volume, checking whether an automatic recovery mode has been preselected for said primary volume, andwhen said automatic recovery mode has been preselected for said primary volume, automatically accessing said secondary volume in lieu of said primary volume, andwhen said automatic recovery mode has not been preselected for said primary volume, not automatically accessing said secondary volume and instead signaling that intervention is required.