US 11,687,417 B2
Secondary storage protection
David Lee Trachy, Longmont, CO (US); and Joshua Daniel Carter, Lafayette, CO (US)
Assigned to Spectra Logic Corporation, Boulder, CO (US)
Filed by David Lee Trachy, Longmont, CO (US); and Joshua Daniel Carter, Lafayette, CO (US)
Filed on Oct. 12, 2022, as Appl. No. 17/964,850.
Claims priority of provisional application 63/257,516, filed on Oct. 19, 2021.
Prior Publication US 2023/0123919 A1, Apr. 20, 2023
Int. Cl. G06F 11/14 (2006.01)
CPC G06F 11/1464 (2013.01) [G06F 11/1451 (2013.01); G06F 11/1461 (2013.01); G06F 2201/84 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for using a backup server with a primary server,
the method comprising:
the backup server storing a base backup volume of data from the primary server at a first scheduled time;
the backup server taking a first snapshot SS1 of the base backup volume of data;
the backup server storing a first volume change, that is a first change to the base backup volume of data, as received from the primary server at a second scheduled time;
the backup server taking a second snapshot SS2 of the first volume change;
the backup server unable to be written to between the first scheduled time in the second schedule time; and
the base backup volume of data is divided into a plurality of equal extents and the first volume change comprises an extent subgroup of the plurality of equal extents that logically replace a corresponding base extent subgroup,
the base backup volume and the first volume change are immutable as soon as they are written to the backup server.