.\" Copyright (c) 1982 The Regents of the University of California.
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This document reflects the use of
with the 4.2BSD and 4.3BSD file system organization. This
original paper written by
operating system is brought up, a consistency
check of the file systems should always be performed.
This precautionary measure helps to insure
a reliable environment for file storage on disk.
If an inconsistency is discovered,
corrective action must be taken.
Normally it is run non-interactively by the system after
When running in this mode,
it will only make changes to the file system that are known
If an unexpected inconsistency is found
will exit with a non-zero exit status,
leaving the system running single-user.
Typically the operator then runs
When running in this mode,
each problem is listed followed by a suggested corrective action.
The operator must decide whether or not the suggested correction
The purpose of this memo is to dispel the
file system inconsistencies.
It first describes the updating of the file system
(the calm before the storm) and
then describes file system corruption (the storm).
the set of deterministic corrective actions
to the rescue) is presented.
.ds RH Overview of the File System