ASYNCHRONOUS TAPE BACKUP AND RESTORE FROM TAPE BACKUP IN A DISK STORAGE ENVIRONMENT

摘要

A metadata object identifying a set of disk locations which have been written to during a consistency group is maintained. Backup data for the consistency group is written. Writing backup data for the consistency group includes identifying a disk location from the set of disk locations, generating a record containing the disk location, data stored at the disk location, and a consistency group value identifying the consistency group, and writing the record to tape storage. Records written to tape storage can be used to restore data to disk storage for a given consistency group.

主权项

1. A method for asynchronous tape backup in a disk storage environment, the method comprising:
maintaining a first metadata object, the first metadata object identifying a first set of disk locations which have been written to during a first consistency group; and writing backup data for the first consistency group, wherein the writing backup data for the first consistency group comprises:
identifying a first disk location from the first set of disk locations;generating a first record comprising the first disk location, data stored at the first disk location, and a consistency group value identifying the first consistency group; andwriting the first record to tape storage.