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Maintaining files in a retained file system

  • US 10,585,762 B2
  • Filed: 10/07/2014
  • Issued: 03/10/2020
  • Est. Priority Date: 04/29/2014
  • Status: Active Grant
First Claim
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1. A method comprising:

  • converting, by the processor, a file into a retained file, wherein the converting includes changing properties of the file to become non-modifiable in the retained file;

    generating, by a processor, a validation error detection code (EDC) based on entire content of the retained file while placing the retained file in a retained file system;

    storing, by the processor, an original version of the retained file as a backup copy at a trusted backup system communicatively coupled to the retained file system via a network and at an instance of converting the file into the retained file, wherein the original version is a version of the file before being converted into the retained file;

    while storing the original version as the backup copy, generating by the processor a backup EDC for the entire content of the backup copy and associating the backup EDC with the backup copy in the trusted backup system;

    generating, by the processor during an integrity check occurring subsequent to the generating the validation EDC, a run-time EDC based on entire content of the retained file in the retained file system;

    comparing, by the processor, the run-time EDC with the validation EDC associated with the retained file to identify a corruption of the retained file when the run-time EDC does not match the validation EDC; and

    restoring, by the processor and upon identification of corruption of the retained file, the original version of the retained file in the retained file system from the backup copy of the trusted backup system, wherein the backup copy does not have the corruption or a modification relative to the original version of the retained file.

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