Date: Thu, 16 Oct 1997 17:31:08 -0700 (PDT) From: Matthew Dillon <dillon@backplane.com> To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: docs/4785: manual page for dump incorrect Message-ID: <199710170031.RAA01804@apollo.backplane.com> Resent-Message-ID: <199710170040.RAA05853@hub.freebsd.org>
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>Number: 4785
>Category: docs
>Synopsis: incorrect explanaion in manual page for dump
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Class: doc-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Oct 16 17:40:01 PDT 1997
>Last-Modified:
>Originator: Matthew Dillon
>Organization:
Best Internet
>Release: FreeBSD 2.2-STABLE i386
>Environment:
>Description:
The manual page for dump, for the 0-9 options, specifies:
-0-9 Dump levels. A level 0, full backup, guarantees the entire file
system is copied (but see also the -h option below). A level
number above 0, incremental backup, tells dump to copy all files
new or modified since the last dump of the same or lower level.
The default level is 9.
It says "last dump of the SAME or lower level". As best as I can
determine, dump's actual mechanism is to copy all files new or
modified since the last dump of a lower level. Not the same level.
>How-To-Repeat:
dump 0ubf 64 - / > /dev/null
dd if=/dev/zero of=/xxx bs=32k count=10 (create big file)
dump 1ubf 64 - / > /dev/null
dump 1ubf 64 - / > /dev/null
dump 1ubf 64 - / > /dev/null
...
note that the second and third level 1 dumps are the same size as
the first level 1 dump.
>Fix:
The documentation needs to be fixed. I don't think the program is
broken.
>Audit-Trail:
>Unformatted:
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