Browse Prior Art Database

Automatic Diskette Condense Function To Eliminate Fragmentation

IP.com Disclosure Number: IPCOM000048498D
Original Publication Date: 1982-Feb-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Chang, PY: AUTHOR [+2]

Abstract

As data is read into and off of the diskette, gaps of free space may be introduced in some blocks of data. If the file is not condensed, the gaps of free space will remain in the file while updating records may need to reserve more space for expansion. As a result, disk fragmentation can become quite pronounced, resulting in a defragmentation of system performance.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Automatic Diskette Condense Function To Eliminate Fragmentation

As data is read into and off of the diskette, gaps of free space may be introduced in some blocks of data. If the file is not condensed, the gaps of free space will remain in the file while updating records may need to reserve more space for expansion. As a result, disk fragmentation can become quite pronounced, resulting in a defragmentation of system performance.

This problem is overcome by the file manager component which does an automatic condense function every time data is read into the diskette. All free space in the adjacent 12 blocks is shifted together. All records in the 12 blocks can share the free space for expansion; therefore, much less disk fragmentation will occur due to a better use of diskette space.

1