The assignee for this patent, patent number 8782360, is
Reporters obtained the following quote from the background information supplied by the inventors: "Direct Access Storage Devices (DASDs) continue to be the systems of choice for storing large amount of persistent data in enterprise data centers due to their high capacity, performance and relatively low cost. Examples of common DASD-based data storage systems include the IBM System Storage DS8000.RTM. products offered by
"Data in storage systems are typically stored in organization units referred to as storage volumes. A Direct Access Storage Device maintains a volume map for each volume that contains information on sets of data stored on the volume. The volume map is used by an operating system to manage user data and free space on the device. Before user data can be stored on a storage device, an initializing operation must be performed to prepare a storage volume on the device for accepting user data. For example, in the
"A subsequent re-initialization of the storage volume typically rewrites the volume label record, the Volume Table of Contents, and the VTOC index. This destroys the pointers to any existing data sets on the volume and as a result, access to user data is lost. Due to human error, a wrong storage volume might be chosen for re-initialization, resulting in the destruction of an existing Volume Table of Contents and the loss of valuable user data. An inadvertent re-initialization of the wrong volume is an infrequent event; however, when it does occur, the results can be catastrophic depending on the contents of the volume.
"If a user determines that the re-initialization of a volume was done in error, the user has no immediate way to recover user data. The lost data can only be recovered if it had been backed up to some other media, such as another storage volume or tape storage, prior to the re-initialization. No simpler solutions for recovering the lost data are currently available. Backing up all user data to some other media, however, is not only time-consuming but also requires the temporary use of some other media that may or may not be readily available at the time the re-initialization is performed.
"From the foregoing, there still exists a need for an improved system and process for preserving an existing volume map in a data storage system when the a storage volume is re-initialized to allow recovery of previously stored data."
In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventors' summary information for this patent: "The present invention addresses the foregoing need by providing a method, system and computer program product for re-initializing a data storage volume while preserving an existing volume map to allow previously stored data to be recovered if needed. The invention comprises creating a new volume map in an unused area of the volume where the new volume map has pointers referencing new data sets on the volume. One of the new data sets includes a previously created volume map and the previously created volume map has pointers that reference previously created data sets.
"The details of the preferred embodiments of the invention, both as to its structure and operation, are described below in the Detailed Description section in reference to the accompanying drawings. The Summary is intended to identify key features of the claimed subject matter, but it is not intended to be used to limit the scope of the claimed subject matter."
For more information, see this patent: Cammarata, James B.; Johnson,
Keywords for this news article include: Information Technology, Information and
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC
Most Popular Stories
- Alabama House Speaker Arrested on Felony Ethics Charges
- Microsoft's Cloud Platform Shines
- 'Fury' Blows 'Gone Girl' Out of the Box Office
- Turkey to Help Kurds Reach Fight in Kobani
- ISIS Seeks to Expand Terror War
- German Intelligence Blames Ukraine Rebels for MH17
- Perez Leads Push for Obama's Job Proposals
- 2016 Camaro Shrinks, Moves to Caddy Platform
- New Effort to Ban Child Labor From Tobacco Farms
- Prius Drivers Battle Stereotypes