Patent ID: 11899540
Assignee: DELL PRODUCTS L.P.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 13:
14. A computer program product, comprising a non-transitory computer-readable medium having a computer-readable program code embodied therein, the computer-readable program code adapted to be executed by one or more processors to implement a method for backup chain regeneration comprising:
creating a full backup image of a source volume, the full backup image corresponding to a state of the source volume at a first time;
tracking, in a first bitmap, changes to the source volume since the first time;
taking a first snapshot of the source volume at a second time, after the first time;
embedding the first bitmap into the first snapshot;
creating a first incremental backup image of the source volume by backing up the changes from the first snapshot according to the first bitmap;
merging a backup chain comprising the first incremental backup image and the full backup image to create a first synthetic full backup image, the first synthetic full backup image thereby corresponding to a state of the source volume at the second time, the state of the source volume at the first time now being lost because the full backup image has been merged with the first incremental backup image;
after the merge, retrieving the first bitmap embedded into the first snapshot of the source volume taken at the second time;
examining the first bitmap to identify the changes made to the source volume since the first time; and
based on the changes according to the first bitmap, regenerating the backup chain to obtain the full backup image and thereby the state of the source volume at the first time and not the second time.