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-.\" Copyright (c) 1982, 1993
-.\" The Regents of the University of California. All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\" notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\" notice, this list of conditions and the following disclaimer in the
-.\" documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\" must display the following acknowledgement:
-.\" This product includes software developed by the University of
-.\" California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\" may be used to endorse or promote products derived from this software
-.\" without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\" @(#)1.t 8.1 (Berkeley) 6/5/93
-.\"
-.ds RH Introduction
-.NH
-Introduction
-.PP
-This document reflects the use of
-.I fsck
-with the 4.2BSD and 4.3BSD file system organization. This
-is a revision of the
-original paper written by
-T. J. Kowalski.
-.PP
-When a UNIX
-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.
-.I Fsck
-runs in two modes.
-Normally it is run non-interactively by the system after
-a normal boot.
-When running in this mode,
-it will only make changes to the file system that are known
-to always be correct.
-If an unexpected inconsistency is found
-.I fsck
-will exit with a non-zero exit status,
-leaving the system running single-user.
-Typically the operator then runs
-.I fsck
-interactively.
-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
-should be made.
-.PP
-The purpose of this memo is to dispel the
-mystique surrounding
-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).
-Finally,
-the set of deterministic corrective actions
-used by
-.I fsck
-(the Coast Guard
-to the rescue) is presented.
-.ds RH Overview of the File System
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