Patent ID: 6167531
Filing Date: 2000-12-26
Classification: G06F

Abstract:
In a system comprising a first computer system and a second computer system, one of said first and second computer systems operating as an active system and the other operating as a standby system, an operating system on each of the first and second computer systems maintaining a table containing entries that reflect the state of one or more sets of mirrored disks attached to the system, each set of mirrored disks containing a plurality of members, a method for transferring sets of mirrored disks of the active system to the standby system in the event of a failure of the active system comprising the steps of:merging the entries of the table of the failed system with the entries of the table of the standby system to create a merged mirror information table on the standby system;switching a connection to the mirrored sets of the active system from the active system to the standby system; andbringing the mirrored sets on-line on the standby system based on information in the merged mirror information table.