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PRESERVING THE INTEGRITY OF A SNAPSHOT ON A STORAGE DEVICE VIA EPHEMERAL WRITE OPERATIONS IN AN INFORMATION MANAGEMENT SYSTEM

  • US 20160042090A1
  • Filed: 08/06/2014
  • Published: 02/11/2016
  • Est. Priority Date: 08/06/2014
  • Status: Abandoned Application
First Claim
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1. A method for preserving the integrity of a snapshot in a storage array, the method comprising:

  • generating, by a storage array, a snapshot of a volume on the storage array, wherein the snapshot is stored on the storage array, and wherein the snapshot comprises one or more first blocks comprising original metadata;

    mapping the snapshot as a logical unit number to a client computing device that is in communication with the storage array;

    configuring a pseudo-volume to correspond to the mapped snapshot, wherein the pseudo-volume is presented by a pseudo-storage-device driver that executes on the client computing device;

    mounting, by a media agent that executes on the client computing device, the pseudo-volume to a mount point on the client computing device,wherein the mounting results in at least one second block comprising metadata that is different from the one or more first blocks of original metadata in the snapshot, andfurther wherein the mounting comprises writing the at least one second block of different metadata to a first data structure configured in the pseudo-volume;

    executing an information management operation that uses the snapshot, based on at least some of the different metadata read from the first data structure configured in the pseudo-volume; and

    wherein the writing of the at least one second block of different metadata to the first data structure configured in the pseudo-volume prevents the original metadata in the snapshot from changing, thereby preserving the integrity of the snapshot through the course of the mounting operation.

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