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Michael Lucas 2005-05-12 14:24:10 +00:00
parent 78104eb5d4
commit 4c6b10478c
Notes: svn2git 2020-12-08 03:00:23 +00:00 
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56
en_US.ISO8859-1/books/faq/book.sgml
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@ -1958,41 +1958,44 @@ sectors/track: 63</screen>
</question> </question>
<answer> <answer>
<para>This error comes from confusion between the boot block's <para>This error comes from confusion between the boot
and the kernel's understanding of the disk devices. The error block's and the kernel's understanding of the disk
usually manifests on two-disk IDE systems, with the hard disks devices. The error usually manifests on two-disk IDE
arranged as the master or single device on separate IDE systems, with the hard disks arranged as the master or
controllers, with FreeBSD installed on the secondary IDE single device on separate IDE controllers, with FreeBSD
controller. The boot blocks think the system is installed on installed on the secondary IDE controller. The boot blocks
ad0 (the second BIOS disk) while the kernel assigns the first think the system is installed on ad0 (the second BIOS
disk on the secondary controller device, ad2. After the device disk) while the kernel assigns the first disk on the
probing, the kernel tries to mount what the boot blocks think secondary controller device, ad2. After the device
is the boot disk, ad0, while it is really ad2, and probing, the kernel tries to mount what the boot blocks
think is the boot disk, ad0, while it is really ad2, and
fails.</para> fails.</para>
<para>To fix the problem, do one of the following:</para> <para>To fix the problem, do one of the following:</para>
<orderedlist> <orderedlist>
<listitem> <listitem>
<para>Reboot the system and hit <para>Reboot the system and hit <keycap>Enter</keycap>
<keycap>Enter</keycap> at the <literal>Booting kernel at the <literal>Booting kernel in 10 seconds; hit
in 10 seconds; hit [Enter] to interrupt</literal> prompt. [Enter] to interrupt</literal> prompt. This will
This will drop you into the boot loader.</para> drop you into the boot loader.</para>
<para>Then type <para>Then type
<literal> <literal>
set root_disk_unit="<replaceable>disk_number</replaceable>" set
root_disk_unit="<replaceable>disk_number</replaceable>"
</literal>. <replaceable>disk_number</replaceable> </literal>. <replaceable>disk_number</replaceable>
will be <literal>0</literal> if FreeBSD is installed on will be <literal>0</literal> if FreeBSD is installed
the master drive on the first IDE controller, on the master drive on the first IDE controller,
<literal>1</literal> if it is installed on the slave on <literal>1</literal> if it is installed on the slave
the first IDE controller, <literal>2</literal> if it is on the first IDE controller, <literal>2</literal> if
installed on the master of the second IDE controller, and it is installed on the master of the second IDE
<literal>3</literal> if it is installed on the slave of controller, and <literal>3</literal> if it is
the second IDE controller.</para> installed on the slave of the second IDE
controller.</para>
<para>Then type <literal>boot</literal>, and your system <para>Then type <literal>boot</literal>, and your
should boot correctly.</para> system should boot correctly.</para>
<para>To make this change permanent (ie so you do not <para>To make this change permanent (ie so you do not
have to do this every time you reboot or turn on have to do this every time you reboot or turn on
@ -2003,8 +2006,9 @@ sectors/track: 63</screen>
</listitem> </listitem>
<listitem> <listitem>
<para>Move the FreeBSD disk onto the primary IDE controller, <para>Move the FreeBSD disk onto the primary IDE
so the hard disks are consecutive.</para> controller, so the hard disks are
consecutive.</para>
</listitem> </listitem>
</orderedlist> </orderedlist>
</answer> </answer>