Management of multiple virtual data copies

Abstract

More than two copies of data in a storage management system may be managed by directing at least one virtual volume to a receiving management class within the storage management system. Each virtual volume is exported to a third multi-volume copy, unknown to the storage management system, based on the receiving management class. A manifest file is created listing each exported virtual volume.

1 . A disaster recovery method supporting local backup comprising:
 writing data to a first storage media;   writing the data to a second storage media;   sending the second storage media off-site;   directing the data to a receiving management class;   writing the data to a third storage media based on the receiving management class; and   creating a manifest file listing the data written to the third storage media.   
   
   
       2 . A disaster recovery method supporting local backup as in  claim 1  further comprising directing the data to a second management class after the data has been written to the third storage media. 
   
   
       3 . A disaster recovery method supporting local backup as in  claim 2  further comprising repeating directing, writing to the third storage media and creating the manifest for new data. 
   
   
       4 . A disaster recovery method supporting local backup as in  claim 1  further comprising:
 determining that the data held on the first storage media is defective; and   reading data from the third storage media corresponding to the data determined defective on the first storage media.   
   
   
       5 . A disaster recovery method supporting local backup as in  claim 1  further comprising:
 determining that usage of the third storage media falls beneath a threshold;   identifying any valid data held on the third storage media;   writing the identified valid data onto a fourth storage media; and   producing a new manifest file listing the data written to the fourth storage media.   
   
   
       6 . A disaster recovery method supporting local backup as in  claim 5  wherein the threshold is based on an amount of valid data remaining on the third storage media.