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:
Feb. 02, 2016
Filed:
Dec. 03, 2013
Compellent Technologies, Eden Prairie, MN (US);
Lawrence E. Aszmann, Prior Lake, MN (US);
Michael J. Klemm, Minnetonka, MN (US);
Michael H. Pittelko, Chaska, MN (US);
Mark D. Olson, Bloomington, MN (US);
Compellent Technologies, Eden Praire, MN (US);
Abstract
A process of determining explicitly free data space in computer data storage systems with implicitly allocated data space through the use of information provided by a hosting computer system with knowledge of what space allocated is currently being used at the time of a query, is provided. In one embodiment, a File System ('FS') is asked to identify clusters no longer in use which is then mapped to physical disks as visible to an Operating System ('OS'). The physical disks are mapped to simulated/virtualized volumes presented by a storage subsystem. By using server information regarding the FS, for those pages that are no longer in use, point in time copy (“PITC”) pages are marked for future PITC and will not be coalesced forward, thereby saving significant storage.