Partitioning within a partition in a disk file storage system

Details Partitioning within a partition in a disk file storage system Partitioning within a partition in a disk file storage system

1998-12-28

2000-02-29

Lintz, Paul R.

Data processing: database and file management or data structures

Database design

Data structure types

707200, 711173, 711203, 709213, G06F 1730

Patent

active

06032161&

ABSTRACT:
A new file system partition is added to an existing partition in disk storage space by creating a new file in the existing storage space of the existing partition and giving this file the attributes of a partition. This new file having partition attributes is referred to as a "raw file." Apparatus in a computing system for creating and accessing a raw file would comprise a storage system controller for creating a raw file of a predetermined size with the attributes of a partition, a storage space driver for accessing storage space in a data storage system and a storage access control for translating an access request for a raw file to an actual address for the raw file so the storage space driver can access the raw file based on the actual address for the raw file. Computer implemented steps create a first file of a predetermined size in a first disk file system, allocate storage locations in the first disk file system to accommodate the storage space required by the first file, store a first file allocation map indicating storage locations allocated to the first file, and convert the first file to a raw file with a unique identifier as a file partition using the same storage locations allocated to the first file. The raw file is accessed by transforming the access request for a raw file to an actual address for a storage device driver.

REFERENCES:
patent: 5109485 (1992-04-01), Smith, Jr.
patent: 5270877 (1993-12-01), Fukushima et al.
patent: 5652863 (1997-07-01), Asensio et al.

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