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diff --git a/sag-0.6.1-www/Invisible/sag-0.6/node51.html b/sag-0.6.1-www/Invisible/sag-0.6/node51.html new file mode 100644 index 0000000..e09dc53 --- /dev/null +++ b/sag-0.6.1-www/Invisible/sag-0.6/node51.html @@ -0,0 +1,80 @@ +<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> +<!--Converted with LaTeX2HTML 96.1-h (September 30, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds --> +<HTML> +<HEAD> +<TITLE>Other tools for the ext2 filesystem</TITLE> +<META NAME="description" CONTENT="Other tools for the ext2 filesystem"> +<META NAME="keywords" CONTENT="sag"> +<META NAME="resource-type" CONTENT="document"> +<META NAME="distribution" CONTENT="global"> +<LINK REL=STYLESHEET HREF="sag.css"> +</HEAD> +<BODY LANG="EN" > + <A NAME="tex2html955" HREF="node52.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="./next_motif.gif"></A> <A NAME="tex2html953" HREF="node41.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="./up_motif.gif"></A> <A NAME="tex2html949" HREF="node50.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="./previous_motif.gif"></A> <A NAME="tex2html957" HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="./contents_motif.gif"></A> <A NAME="tex2html958" HREF="node114.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="./index_motif.gif"></A> <BR> +<B> Next:</B> <A NAME="tex2html956" HREF="node52.html">Disks without filesystems</A> +<B>Up:</B> <A NAME="tex2html954" HREF="node41.html">Filesystems</A> +<B> Previous:</B> <A NAME="tex2html950" HREF="node50.html">Other tools for all </A> +<BR> <P> +<H2><A NAME="SECTION005810000000000000000">Other tools for the ext2 filesystem</A></H2> +<P> + In addition to the filesystem creator (<tt>mke2fs</tt><A NAME="1740"> </A>) and + checker (<tt>e2fsck</tt><A NAME="1742"> </A>) accessible directly or via the + filesystem type independent front ends, the ext2 + filesystem has some additional tools that can be useful. +<P> + <tt>tune2fs</tt><A NAME="1744"> </A> adjusts filesystem parameters. Some of the + more interesting parameters are: + <UL> +<LI> A maximal mount count. <tt>e2fsck</tt><A NAME="1746"> </A> enforces a check when + filesystem has been mounted too many times, even if + the clean flag is set. For a system that is used for + developing or testing the system, it might be a good + idea to reduce this limit. +<LI> A maximal time between checks. <tt>e2fsck</tt><A NAME="1748"> </A> can also enforce + a maximal time between two checks, even if the clean + flag is set, and the filesystem hasn't been mounted very + often. This can be disabled, however. +<LI> Number of blocks reserved for <tt>root</tt>. Ext2 + reserves some blocks for <tt>root</tt> so that if the + filesystem fills up, it is still possible to do system + administration without having to delete anything. The + reserved amount is by default 5%, which on most disks + isn't enough to be wasteful. However, for floppies there + is no point in reserving any blocks. + </UL> + See the <em>tune2fs</em><A NAME="1750"> </A> manual page for more information. +<P> + <tt>dumpe2fs</tt><A NAME="1752"> </A> shows information about an ext2 filesystem, mostly + from the superblock. Figure <A HREF="node51.html#figdumpe2fsoutput">4.5</A> shows + a sample output. Some of the information in the output is + technical and requires understanding of how the filesystem + works (see appendix <A HREF="#chapext2fspaper"><IMG ALIGN=BOTTOM ALT="gif" SRC="./cross_ref_motif.gif"></A>), but much of + it is readily understandable even for layadmins. +<P> +<P><A NAME="1434"> </A><A NAME="figdumpe2fsoutput"> </A><IMG WIDTH=421 HEIGHT=569 ALIGN=BOTTOM ALT="figure1374" SRC="img9.gif"><BR> +<STRONG>Figure 4.5:</STRONG> Sample output from <tt>dumpe2fs</tt><A NAME="1754"> </A><BR> +<P> +<P> + <tt>debugfs</tt><A NAME="1756"> </A> is a filesystem debugger. It allows direct + access to the filesystem data structures stored on disk and + can thus be used to repair a disk that is so broken that + <tt>fsck</tt><A NAME="1758"> </A> can't fix it automatically. It has also been known + to be used to recover deleted files. However, <tt>debugfs</tt><A NAME="1760"> </A> + very much requires that you understand what you're doing; + a failure to understand can destroy all your data. +<P> + <tt>dump</tt><A NAME="1762"> </A> and <tt>restore</tt><A NAME="1764"> </A> can be used to back up an + ext2 filesystem. They are ext2 specific versions of the + traditional UNIX backup tools. See chapter <A HREF="node96.html#chapbackups">10</A> + for more information on backups. +<P> +<HR><A NAME="tex2html955" HREF="node52.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="./next_motif.gif"></A> <A NAME="tex2html953" HREF="node41.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="./up_motif.gif"></A> <A NAME="tex2html949" HREF="node50.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="./previous_motif.gif"></A> <A NAME="tex2html957" HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="./contents_motif.gif"></A> <A NAME="tex2html958" HREF="node114.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="./index_motif.gif"></A> <BR> +<B> Next:</B> <A NAME="tex2html956" HREF="node52.html">Disks without filesystems</A> +<B>Up:</B> <A NAME="tex2html954" HREF="node41.html">Filesystems</A> +<B> Previous:</B> <A NAME="tex2html950" HREF="node50.html">Other tools for all </A> +<P><ADDRESS> +<I>Lars Wirzenius <BR> +Sat Nov 15 02:32:11 EET 1997</I> +</ADDRESS> +</BODY> +</HTML> |