os/doc
3
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Remove out of date question

Browse source 
Noted by:	scottl
Approved by:	bcr (mentor, implicit)
This commit is contained in:
Eitan Adler 2013-02-08 00:22:40 +00:00
parent f3fff6b843
commit df9fdede2a
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=40908
1 changed files with 0 additions and 60 deletions

60
en_US.ISO8859-1/books/faq/book.xml
View file

@ -1420,66 +1420,6 @@
</answer> </answer>
</qandaentry> </qandaentry>
<qandaentry>
<question id="panic-on-install-reboot">
<para>Why do I get a <errorname>panic: can't mount
root</errorname> error when rebooting the system after
installation?</para>
</question>
<answer>
<para>This error comes from confusion between the boot block's
and the kernel's understanding of the disk devices. The
error usually manifests on two-disk IDE systems, with the
hard disks arranged as the master or single device on
separate IDE controllers, with &os; installed on the
secondary IDE controller. The boot blocks think the system
is installed on <devicename>ad0</devicename> (the second
BIOS disk) while the kernel assigns the first disk on the
secondary controller device, <devicename>ad2</devicename>.
After the device probing, the kernel tries to mount what the
boot blocks think is the boot disk,
<devicename>ad0</devicename>, while it is really
<devicename>ad2</devicename>, and fails.</para>
<para>To fix the problem, do one of the following:</para>
<orderedlist>
<listitem>
<para>Reboot the system and hit <keycap>Enter</keycap> at
the <literal>Booting kernel in 10 seconds; hit [Enter]
to interrupt</literal> prompt. This will drop you into
the boot loader.</para>
<para>Then type
<userinput>set root_disk_unit="<replaceable>disk_number</replaceable>"</userinput>.
<replaceable>disk_number</replaceable> will be
<literal>0</literal> if &os; is installed on the master
drive on the first IDE controller, <literal>1</literal>
if it is installed on the slave on the first IDE
controller, <literal>2</literal> if it is installed on
the master of the second IDE controller, and
<literal>3</literal> if it is installed on the slave of
the second IDE controller.</para>
<para>Then type <userinput>boot</userinput>, and your
system should boot correctly.</para>
<para>To make this change permanent (i.e, so you do not
have to do this every time you reboot or turn on your
&os; machine), put the line
<userinput>root_disk_unit="<replaceable>disk_number</replaceable>"</userinput>
in <filename>/boot/loader.conf.local</filename>.</para>
</listitem>
<listitem>
<para>Move the &os; disk onto the primary IDE
controller, so the hard disks are consecutive.</para>
</listitem>
</orderedlist>
</answer>
</qandaentry>
<qandaentry> <qandaentry>
<question id="memory-limits"> <question id="memory-limits">
<para>What are the limits for memory?</para> <para>What are the limits for memory?</para>