Patent ID: 9329938
Filing Date: 2016-05-03
CPC Classification: G06F

Claim Text:
1. A method, comprising: receiving, by a storage system, a storage request; identifying, based on the storage request, one or more storage management units; identifying, for each of the storage management units, one or more master partition tables having multiple master entries and one or more backup partition tables, each of the backup partition tables having backup entries in a one-to-one-correspondence with the master entries; performing the storage request; upon performing the storage request, identifying any changes to essential metadata in the one or more master partition tables; storing the identified changes to the essential metadata in the one or more backup partition tables; and upon detecting a failure in master partition table, configuring one of the backup partition tables as a replacement master partition table, calculating, using the essential metadata in the replacement master partition table, non-essential metadata, and storing the calculated non-essential metadata to the replacement master partition table.