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Permanent-File-Validation Utility Computer ProgramErrors in files detected and corrected during operation. Permanent File Validation (PFVAL) utility computer program provides CDC CYBER NOS sites with mechanism to verify integrity of permanent file base. Locates and identifies permanent file errors in Mass Storage Table (MST) and Track Reservation Table (TRT), in permanent file catalog entries (PFC's) in permit sectors, and in disk sector linkage. All detected errors written to listing file and system and job day files. Program operates by reading system tables , catalog track, permit sectors, and disk linkage bytes to vaidate expected and actual file linkages. Used extensively to identify and locate errors in permanent files and enable online correction, reducing computer-system downtime.
Document ID
19880000534
Document Type
Other - NASA Tech Brief
Authors
Derry, Stephen D. (Unisys Corp.)
Date Acquired
August 13, 2013
Publication Date
November 1, 1988
Publication Information
Publication: NASA Tech Briefs
Volume: 12
Issue: 10
ISSN: 0145-319X
Subject Category
MATHEMATICS AND INFORMATION SCIENCES
Report/Patent Number
LAR-13946
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.