The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 2016
Filed:
Aug. 10, 2012
Zhen-hua Song, Beijing, CN;
Weicai Chen, Hangzhou, CN;
Qian Wang, Hangzhou, CN;
Jia Wan, Hangzhou, CN;
Zhen-hua Song, Beijing, CN;
Weicai Chen, Hangzhou, CN;
Qian Wang, Hangzhou, CN;
Jia Wan, Hangzhou, CN;
Alibaba Group Holding Limited, Grand Cayman, KY;
Abstract
The present disclosure introduces a method and an apparatus of shrinking virtual hard disk image file. The present techniques search a garbage data block in a file and revise a record of the garbage data block in a block allocation table (BAT). The file includes one or more data blocks and a BAT that records information of each data block. The garbage data block is a data block that does not store effective data. The present techniques move an effective data block subsequent to the garbage data block, revise a record of the effective data block in the BAT after the moving, and shrink a size of the file after the movement.