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diff --git a/sag-0.6.1-www/Invisible/sag-0.6/node52.html b/sag-0.6.1-www/Invisible/sag-0.6/node52.html new file mode 100644 index 0000000..2938b1b --- /dev/null +++ b/sag-0.6.1-www/Invisible/sag-0.6/node52.html @@ -0,0 +1,61 @@ +<!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>Disks without filesystems</TITLE> +<META NAME="description" CONTENT="Disks without filesystems"> +<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="tex2html967" HREF="node53.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="./next_motif.gif"></A> <A NAME="tex2html965" HREF="node28.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="./up_motif.gif"></A> <A NAME="tex2html959" HREF="node51.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="./previous_motif.gif"></A> <A NAME="tex2html969" HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="./contents_motif.gif"></A> <A NAME="tex2html970" HREF="node114.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="./index_motif.gif"></A> <BR> +<B> Next:</B> <A NAME="tex2html968" HREF="node53.html">Allocating disk space</A> +<B>Up:</B> <A NAME="tex2html966" HREF="node28.html">Using Disks and Other </A> +<B> Previous:</B> <A NAME="tex2html960" HREF="node51.html">Other tools for the </A> +<BR> <P> +<H1><A NAME="SECTION00590000000000000000">Disks without filesystems</A></H1> +<P> + Not all disks or partitions are used as filesystems. A swap + partition, for example, will not have a filesystem on it. Many + floppies are used in a tape-drive emulating fashion, so that + a <tt>tar</tt><A NAME="1766"> </A> or other file is written directly on the raw disk, + without a filesystem. Linux boot floppies don't contain a + filesystem, only the raw kernel. +<P> + Avoiding a filesystem has the advantage of making more of the + disk usable, since a filesystem always has some bookkeeping + overhead. It also makes the disks more easily compatible with + other systems: for example, the <tt>tar</tt><A NAME="1768"> </A> file format is the same + on all systems, while filesystems are different on most systems. + You will quickly get used to disks without filesystems if you + need them. Bootable Linux floppies also do not necessarily have + a filesystem, although that is also possible. +<P> + One reason to use raw disks is to make image copies of them. + For instance, if the disk contains a partially damaged filesystem, + it is a good idea to make an exact copy of it before trying to + fix it, since then you can start again if your fixing breaks things + even more. One way to do this is to use <tt>dd</tt><A NAME="1770"> </A>: + <BLOCKQUOTE> <TT> +<code>$</code> <I>dd if=/dev/fd0H1440 of=floppy-image</I> <BR> +<code>2880+0 records in</code> <BR> +<code>2880+0 records out</code> <BR> +<code>$</code> <I>dd if=floppy-image of=/dev/fd0H1440 </I> <BR> +<code>2880+0 records in</code> <BR> +<code>2880+0 records out</code> <BR> +<code>$</code> + </TT></BLOCKQUOTE> + The first <tt>dd</tt><A NAME="1772"> </A> makes an exact image of the floppy to the file + <tt>floppy-image</tt><A NAME="1774"> </A>, the second one writes the image to the floppy. + (The user has presumably switched the floppy before the second + command. Otherwise the command pair is of doubtful usefulness.) +<P> +<BR> <HR> +<P><ADDRESS> +<I>Lars Wirzenius <BR> +Sat Nov 15 02:32:11 EET 1997</I> +</ADDRESS> +</BODY> +</HTML> |