Invention Grant
- Patent Title: Enhanced copy-on-write operation for solid state drives
- Patent Title (中): 增强的固态硬盘写时操作
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Application No.: US13205493Application Date: 2011-08-08
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Publication No.: US08868869B2Publication Date: 2014-10-21
- Inventor: Carl Evan Jones , Subhojit Roy , Rahul Fiske
- Applicant: Carl Evan Jones , Subhojit Roy , Rahul Fiske
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Nelson and Nelson
- Agent Daniel P. Nelson; Alexis V. Nelson
- Main IPC: G06F12/00
- IPC: G06F12/00 ; G06F12/02 ; G06F3/06 ; G06F13/00 ; G06F13/28 ; G06F11/14

Abstract:
A method for increasing the efficiency of a “copy-on-write” operation performed on an SSD to extend the life of the SSD is disclosed herein. In one embodiment, such a method includes receiving a first logical address specifying a logical location where new data should be written to an SSD. The first logical address maps to a first physical location, storing original data, on the SSD. The method further receives a second logical address specifying a logical location where the original data should be available on the SSD. The second logical address maps to a second physical location on the SSD. To efficiently perform the copy-on-write operation, the method writes the new data to a new physical location on the SSD, maps the first logical address to the new physical location, and maps the second logical address to the first physical location. A corresponding apparatus is also disclosed.
Public/Granted literature
- US20130042049A1 ENHANCED COPY-ON-WRITE OPERATION FOR SOLID STATE DRIVES Public/Granted day:2013-02-14
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