Patent
Virtual addressing of optical storage media as magnetic tape equivalents
Richard V. Keele,Craig D. Mautner,Tracy J. Thorpe,Sidney R. Thompson,Michael C. Goodsell,Philip J. Erdelsky +5 more
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TLDR
In this article, an optical disk storage system emulates a magnetic tape subsystem by virtual addressing of data recorded on write once optical disk media having a predetermined group of available sectors for rewriting a disk ID, a predetermined plurality of bands of available sector for rewriting virtual tape directory to virtual tape VSNs, and available sectors with data portions for simulating tape marks and interblock gap and for addressing blocks of data within the virtual tapes.Abstract:
An optical disk storage system emulates a magnetic tape subsystem by virtual addressing of data recorded on write once optical disk media having a predetermined group of available sectors for rewriting a disk ID, a predetermined plurality of bands of available sectors for rewriting a virtual tape directory to virtual tape VSNs, and, available sectors for rewriting virtual tape maps and rewriting user records, the tape maps have data portions for simulating tape marks and interblock gap and for addressing blocks of data within the virtual tapes, the virtual tape directory has pointers for pointing to tape maps, and the system rewrites the tape directory, tape maps and user records so as to function as a rewritable magnetic tape.read more
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Method and system for maintaining data in a continuous data protection system
Roger Keith Stager,Donald Alvin Trimmer,Pawan Saxena,Randall Johnson,Craig Anthony Johnston,Yafen Peggy Chang,Rico Blaser +6 more
TL;DR: In this paper, a method and system where data is maintained in a continuous data protection system is disclosed, where a primary volume may be protected according to an any-point-in-time (APIT) window wherein restores may be performed at any time as desired.
Patent
Intelligent digital audiovisual reproduction system
Guy Nathan,Tony Mastronardi +1 more
TL;DR: Payment-based audiovisual playback system characterized by comprising a microprocessor unit, primarily including storage means for storing inter alia in digital form the visual and sound information to be used, and associated, through a number of interfaces, with display means for sound playback which provide a multimedia environment as discussed by the authors.
Patent
Method and system for data recovery in a continuous data protection system
Roger Keith Stager,Donald Alvin Trimmer,Pawan Saxena,Randall Johnson,Craig Anthony Johnston,Yafen Peggy Chang,Rico Blaser +6 more
TL;DR: In this article, the authors propose a method for data recovery in a continuous data protection system having a primary volume and a secondary volume by selecting a snapshot of the primary volume to be recovered and a location on which the snapshot is to be loaded.
Patent
Read-after-write verification for improved write-once-read-many data storage
TL;DR: In this paper, a file-based networked storage server enables a user to selectively enable or disable an option to require read-after-write verification for sets of data stored by the filebased NSS server.
Patent
Tape drive emulation system including tape library interface
TL;DR: In this article, an improved virtual tape storage device that utilizes a standard tape library coupled to the host (10) to destage virtual volumes (32) to reclaim space in the virtual storage system is presented.
References
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Patent
Information retrieval system and method using independent user stations
Justin Korn,Stephen F. Schmelzer +1 more
TL;DR: An information retrieval system (10) including user stations (30) and storage units is described in this paper, where the storage units such as video disks or cassettes are stored oriented vertically in a storage rack (60).
Patent
Crypto microprocessor that executes enciphered programs
TL;DR: In this article, a microprocessor for executing computer programs which are stored in cipher to prevent software piracy is proposed, which can process valuable proprietary programs and data files which are distributed in cipher on videodiscs, semiconductor memory, or other media without risk of software piracy.
Patent
Computer memory system with parallel garbage collection independent from an associated user processor
TL;DR: In this article, the reference count process includes providing for a reference count indicating the number of pointer references to a memory block (120, 121, 126-129, 122, 132, 133) in the virtual address space (Area 1, Area 2, Area 3).
Patent
Pseudo-erasable and rewritable write-once optical disk memory system
TL;DR: In this article, a write-once, read-many optical data storage system is defined, which includes an optical disk to which data is written such that a host data system having access to the optical data disk is enabled to access any one of a predetermined number of logical addresses for storing data at a selected logical address whether or not data had previously been stored at that logical address.
Patent
Optical disk storage format, method and apparatus for emulating a magnetic tape drive
TL;DR: In this article, a high-level directory is constructed providing a list of addresses for the embedded directories, which comprise a fixed maximum number of entries each indicating the length of a corresponding record.
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