公开(公告)号：US10387313B2

公开(公告)日：2019-08-20

申请号：US14708525

申请日：2015-05-11

Applicant: MICROSOFT TECHNOLOGY LICENSING, LLC

Inventor： Mehmet Iyigun ,  Yevgeniy Bak ,  Michael Fortin ,  David Fields ,  Cenk Ergan ,  Alex Kirshenbaum

IPC: G06F12/08 ,  G06F12/12 ,  G06F12/0831 ,  G06F11/14 ,  G06F12/0866 ,  G06F12/14 ,  G06F12/128 ,  G06F12/0862

Abstract: To ensure that the contents of a non-volatile memory device cache may be relied upon as accurately reflecting data stored on disk storage, it may be determined whether the cache contents and/or disk contents are modified during a power transition, causing cache contents to no longer accurately reflect data stored in disk storage. The cache device may be removable from the computer, and unexpected removal of the cache device may cause cache contents to no longer accurately reflect data stored in disk storage. Cache metadata may be managed during normal operations and across power transitions, ensuring that cache metadata may be efficiently accessed and reliably saved and restored across power transitions. A state of a log used by a file system may be determined prior to and subsequent to reboot of an operating system in order to determine whether data stored on a cache device may be reliably used.