Single step merging of a virtual hard disk chain

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United States of America Patent

PATENT NO 11086724
SERIAL NO

15786881

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Abstract

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Embodiments for a method of backing up virtual hard disks by: parsing a list of base parent and differencing disks to identify disk parameters and child disks of immediate parent disks; creating a differencing disk chain in reverse time order of modification of the base parent disk starting from the base parent disk to a latest child differencing disk; identifying changed sectors in each child disk starting from the latest child differencing disk; creating a list detailing a respective differencing disk, sector offsets and logical data sector index for each changed sector; iteratively adding updated sectors to the list for latest changed sectors that were not previously added to the list by a later child disk by reading the changed sectors from their respective child disk; and merging, in a single step, the changed sectors read from their respective child disks into the base parent disk.

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Patent Owner(s)

  • EMC IP HOLDING COMPANY LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Acharya, Soumen Bangalore, IN 36 184
Anappa, Pradeep Bangalore, IN 9 17
Bansal, Aaditya R Bathinda, IN 2 6
Hebsur, Sudha V Bangalore, IN 2 6
Tokuri, Suman C Bangalore, IN 2 6
Yadav, Sunil Bangalore, IN 194 357

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