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<body text="#000000" bgcolor="#FFFFFF" link="#0000EF" vlink="#51188E" <body text="#000000" bgcolor="#FFFFFF" link="#0000EF" vlink="#51188E"
alink="#FF0000"> alink="#FF0000">
<center>$Id: index.html,v 1.61 2001/12/26 04:46:09 freesource Exp $</center> <center>$Id: index.html,v 1.62 2002/01/06 09:52:52 freesource Exp $</center>
<p> <p>
@ -478,11 +478,13 @@ and things should become more clear.
<br> <br>
12.&nbsp;&nbsp;<a href="#12">What does the 2 disk compression method do?</a> 12.&nbsp;&nbsp;<a href="#12">What does the 2 disk compression method do?</a>
<br> <br>
13.&nbsp;&nbsp;<a href="#13">There isn't enough room left on my 1440 floppy to make a Boot or Root disk. Is there any way to free up more space apart from reducing the size of the kernel?</a> 13.&nbsp;&nbsp;<a href="#13">I've created a root fs.&nbsp;&nbsp;Then I've tried to create the boot disk using the 2 disk compression method.&nbsp;&nbsp;The device selection is /dev/fd0, size is 1440k, but the initrd_image.gz is 715k.&nbsp;&nbsp;I don't know much about boot disks but shouldn't the boot disks contain mainly the kernel?</a>
<br> <br>
14.&nbsp;&nbsp;<a href="#14">gBootRoot doesn't start because it can't locate Gtk.pm?</a> 14.&nbsp;&nbsp;<a href="#14">There isn't enough room left on my 1440 floppy to make a Boot or Root disk. Is there any way to free up more space apart from reducing the size of the kernel?</a>
<br> <br>
15.&nbsp;&nbsp;<a href="#15">If you roll the floppy density counter down to 0 and then try go back up towards 1440 and 1722, you get very funny figures.</a> 15.&nbsp;&nbsp;<a href="#15">gBootRoot doesn't start because it can't locate Gtk.pm?</a>
<br>
16.&nbsp;&nbsp;<a href="#16">If you roll the floppy density counter down to 0 and then try go back up towards 1440 and 1722, you get very funny figures.</a>
</a> </a>
@ -1096,8 +1098,54 @@ image.&nbsp;&nbsp;The
initrd script mounts another root disk with a compressed (gzip or bzip2) initrd script mounts another root disk with a compressed (gzip or bzip2)
filesystem.</P> filesystem.</P>
<p><a name="13"><b>I've created a root fs.&nbsp;&nbsp;Then I've tried to create the boot disk using the 2 disk compression method.&nbsp;&nbsp;The device selection is /dev/fd0, size is 1440k, but the initrd_image.gz is 715k.&nbsp;&nbsp;I don't know much about boot disks but shouldn't the boot disks contain mainly the kernel?</b></a>&nbsp;&nbsp;<a href="#FAQ">[back]</a></p>
<p><a name="13"><b>There isn't enough room left on my 1440 floppy to make a Boot or Root <p>
If you are creating a single boot disk in which the kernel knows where to
find the root filesystem, then nothing else but a kernel is required
assuming it is copied in a way that is starts at block 0 on the device
media.&nbsp;&nbsp;
However, in order to boot /dev/fd0 from /dev/fd0 the kernel has to
mount the initial boot disk, and then after the new root disk is inserted,
it remounts that disk.&nbsp;&nbsp;In order to accomplish this, an initrd is
required.&nbsp;&nbsp;
Initial ram disks are essentially mini filesystems with the
bare necessities to allow a special init type file called linuxrc to
perform similar types of duties as an init, but in a much more esoteric
fashion than
an init.&nbsp;&nbsp;
During a kernels initrd stage it looks for linuxrc, and during
normal boot it looks for init or a specified init passed as an option to
the kernel.
<p>
So you are probably wondering what all this has to do with the large initrd
size when using the 2 disk compression method.&nbsp;&nbsp;
Linuxrc can be anything, from a statically-linked executable to a script
which requires the dynamically-linked ash executable.&nbsp;&nbsp;
In the case of the 2
disk compression method, the later method is employed, and this uses
information found directly from your host system.&nbsp;&nbsp;You may have
noticed
the libraries required by ash found from your host system
can be quite large even after being stripped assuming you are using a major
distribution or derivative of
one.&nbsp&nbsp;
The advantage of a two disk boot/root
system is related to the fact that modern kernels are themselves quite
large, leaving very little room for a root filesystem.&nbsp;&nbsp;
The present ABS
(boot section) is descended from some pretty old historic code from the
original bootroot and is due
for a major upgrade to allow a lot more flexibility in creating
streamlined boot disks from a variety of user definable methods.
Unfortunately (or fortunately for root filesystem making, a process which
used to take days), I've been devoting a lot of time to the ARS, but
hopefully I'll be adding major changes to the ABS in the near future.
<p><a name="14"><b>There isn't enough room left on my 1440 floppy to make a Boot or Root
disk.&nbsp;&nbsp;Is there any way to free up more space apart from reducing disk.&nbsp;&nbsp;Is there any way to free up more space apart from reducing
the size of the kernel?</b></a>&nbsp;&nbsp;<a href="#FAQ">[back]</a></p> the size of the kernel?</b></a>&nbsp;&nbsp;<a href="#FAQ">[back]</a></p>
@ -1133,11 +1181,11 @@ to add your comments to the Feature Request.&nbsp;&nbsp;Thanks.</p>
<p> <p>
<a name="14"><b>gBootRoot doesn't start because it can't locate Gtk.pm?</b></a>&nbsp;&nbsp;<a href="#FAQ">[back]</a></P> <a name="15"><b>gBootRoot doesn't start because it can't locate Gtk.pm?</b></a>&nbsp;&nbsp;<a href="#FAQ">[back]</a></P>
<p>This program requires Gtk-Perl available from <a href="http://www.perl.com/CPAN">CPAN</a>, <a href="http://freshmeat.net/projects/gtk-perl">Freshmeat</a> or most GNU/Linux distributions.</p> <p>This program requires Gtk-Perl available from <a href="http://www.perl.com/CPAN">CPAN</a>, <a href="http://freshmeat.net/projects/gtk-perl">Freshmeat</a> or most GNU/Linux distributions.</p>
<p><a name="15"><b>If you roll the floppy density counter down to 0 and then try go back <p><a name="16"><b>If you roll the floppy density counter down to 0 and then try go back
up towards 1440 and 1722, you get very funny figures.</b></a>&nbsp;&nbsp;<a href="#FAQ">[back]</a></p> up towards 1440 and 1722, you get very funny figures.</b></a>&nbsp;&nbsp;<a href="#FAQ">[back]</a></p>
<p> <p>