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"I just upgraded from 3.x to 4.x" > /dev/null

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Michael Lucas 2005-05-12 15:54:15 +00:00
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en_US.ISO8859-1/books/faq/book.sgml
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@ -1554,73 +1554,6 @@ File: +DESC (ignored)</screen>
</answer>
</qandaentry>
<qandaentry>
<question id="bad144-3x-4x">
<para>I have just upgraded from 3.X to 4.X, and my first boot
failed with <errorname>bad sector table not
supported</errorname></para>
</question>
<answer>
<para>FreeBSD 3.X and earlier supported
<command>bad144</command>, which automatically remapped
bad blocks. FreeBSD 4.X and later do not support this, as
modern IDE drives include this functionality. See <link
linkend="install-bad-blocks">this question</link> for
more information.</para>
<para>To fix this after an upgrade, you need to physically
place the drive in a working system and use
&man.disklabel.8; as discussed in the following
questions.</para>
</answer>
</qandaentry>
<qandaentry>
<question id="find-bad144">
<para>How do I tell if a drive has <command>bad144</command>
information on it before I try to upgrade to FreeBSD 4.0
and it fails?</para>
</question>
<answer>
<para>Use &man.disklabel.8; for this. <command>disklabel -r
<replaceable>drive device</replaceable></command> will
give you the contents of your disk label. Look for a
<literal>flags</literal> field. If you see
<literal>flags: badsect</literal>, this drive is using
bad144. For example, the following drive has
<command>bad144</command> enabled.:</para>
<screen>&prompt.root; <userinput>disklabel -r wd0</userinput>
# /dev/rwd0c:
type: ESDI
disk: wd0s1
label:
flags: badsect
bytes/sector: 512
sectors/track: 63</screen>
</answer>
</qandaentry>
<qandaentry>
<question id="disable-bad144">
<para>How do I remove <command>bad144</command> from my
pre-4.X system so I can upgrade safely?</para>
</question>
<answer>
<para>Use <command>disklabel -e -rwd0 </command> to edit the
disklabel in place. Just remove the word
<literal>badsect</literal> from the flags field, save, and
exit. The bad144 file will still take up some space on
your drive, but the disk itself will be usable.</para>
<para>We still recommend you purchase a new disk if you have
a large number of bad blocks.</para>
</answer>
</qandaentry>
<qandaentry>
<question id="boot-floppy-strangeness">
<para>Strange things happen when I boot the install floppy!