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12 <LINK REL="HOME" HREF="index.html" TITLE=" Mondo Rescue and Mindi Linux HOWTO "><LINK REL="UP" HREF="faq.html" TITLE=" Troubleshooting/FAQ "><LINK REL="PREVIOUS" HREF="faqgeneral.html" TITLE=" General "><LINK REL="NEXT" HREF="faqinstallation.html" TITLE=" Installation "></HEAD>
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20       Mondo Rescue and Mindi Linux HOWTO</TD>
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28       Chapter 10. Troubleshooting/FAQ</TD>
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37  <H1 CLASS="SECTION" ALIGN=LEFT>
38   <A NAME="FAQBOOTING"></A>10.3. Kernel/Linux/Booting</H1>
39  <DL>
40   <P ALIGN=LEFT>
41    <DT CLASS="mvd-P">Q: <A HREF="faqbooting.html#AEN601">How do I know
42    if Mondo works with my Linux distro?</A><BR>
43    <DT CLASS="mvd-P">Q: <A HREF="faqbooting.html#AEN607">When I try to
44    boot from the Mondo CD, it says, &quot;VFS: Unable to mount root
45    fs.&quot; I am using a Debian distro. What do I do?</A><BR>
46    <DT CLASS="mvd-P">Q: <A HREF="faqbooting.html#AEN612">When I try to
47    boot from the Mondo CD, it says, &quot;Cannot mount root fs - kernel
48    panic,&quot; or something similar. What do I do?</A><BR>
49    <DT CLASS="mvd-P">Q: <A HREF="faqbooting.html#AEN618">When I try to
50    boot from the Mondo CD, it says, &quot;Mounting /tmp/tmpfs...fatal
51    error! Failed UPGRADE YOUR RAM&quot;. What does that mean?</A><BR>
52    <DT CLASS="mvd-P">Q: <A HREF="faqbooting.html#AEN624">When I try to
53    boot from the Mondo CD, it says something about not finding my CD-ROM
54    drive and then it blames the kernel. What does that mean?</A><BR>
55    <DT CLASS="mvd-P">Q: <A HREF="faqbooting.html#AEN631">The Mondo
56    CD/floppy takes ages to boot. How can I speed it up?</A><BR>
57    <DT CLASS="mvd-P">Q: <A HREF="faqbooting.html#AEN636">I made a Mondo
58    CD using the failsafe kernel (i.e. I said 'no' when Mondo asked if I
59    wanted to use my own kernel). It still doesn't boot. Help!</A><BR>
60    <DT CLASS="mvd-P">Q: <A HREF="faqbooting.html#AEN641">What if my PC
61    won't boot from a CD?</A><BR>
62    <DT CLASS="mvd-P">Q: <A HREF="faqbooting.html#AEN647">But why won't
63    Mondo boot from my CD? It says my kernel is flawed/outdated/
64    whatever, and when I wrote to you, you told me the same thing... but
65    I still don't get it. I mean, my kernel works for everything else.
66    Why not Mondo?</A><BR>
67    <DT CLASS="mvd-P">Q: <A HREF="faqbooting.html#AEN653">Why do I only
68    need a boot disk if I'm using a tape drive? Where are the data disks?</A><BR>
69    <DT CLASS="mvd-P">Q: <A HREF="faqbooting.html#AEN658">Why does it
70    say, &quot;Process accounting FAILED&quot; when I reboot?</A><BR>
71    <DT CLASS="mvd-P">Q: <A HREF="faqbooting.html#AEN663">Why does it
72    say, &amp;#8220;request_module[block-major-1]: Root fs not mounted
73    VFS: Cannot open root device &quot;100&quot; or 01:00 Please append a
74    correct &quot;root=&quot; boot option kernel panic: VFS: Unable to
75    mount root fs on 01:00&amp;#8221; when i boot from the CD?</A><BR>
76    <DT CLASS="mvd-P">Q: <A HREF="faqbooting.html#COPYBOOTDATADISK">How
77    do i copy boot+data disk images to physical floppy disks?</A><BR>
78    <DT CLASS="mvd-P">Q: <A HREF="#TAPENICE">My tape drive doesn't play
79    nicely with Mondo at boot-time. What do I do?</A></P>
80   </DL>
81  <P ALIGN=LEFT>
82   <A NAME="AEN601"></A><B>Q: </B>How do I know if Mondo works with my
83   Linux distro?</P>
84  <P ALIGN=LEFT>
85   <B>A: </B>Try running it. :) That's always a good way to find out.
86   Check the <A HREF="../../docs/docs.html" TARGET="_top">Documentation page</A>,
87    too.</P>
88  <P ALIGN=LEFT>
89   <A NAME="AEN607"></A><B>Q: </B>When I try to boot from the Mondo CD,
90   it says, &quot;VFS: Unable to mount root fs.&quot; I am using a
91   Debian distro. What do I do?</P>
92  <P ALIGN=LEFT>
93   <B>A: </B>Ask Debian's designers why they, unlike every other distro
94   I can find, have included cramfs and other 'goodies' with their
95   kernel. In the meantime, please use '-k FAILSAFE' in your command
96   line when calling Mondo.</P>
97  <P ALIGN=LEFT>
98   <A NAME="AEN612"></A><B>Q: </B>When I try to boot from the Mondo CD,
99   it says, &quot;Cannot mount root fs - kernel panic,&quot; or
100   something similar. What do I do?</P>
101  <P ALIGN=LEFT>
102   <B>A: </B>Recompile your kernel (or use '-k FAILSAFE'). Take a look
103   at <A HREF="kernelsupport.html">Linux Kernel support</A> to see what
104   you're kernel must support.</P>
105  <P ALIGN=LEFT>
106   <A NAME="AEN618"></A><B>Q: </B>When I try to boot from the Mondo CD,
107   it says, &quot;UPGRADE YOUR RAM&quot;. What does that mean?</P>
108  <P ALIGN=LEFT>
109   <B>A: </B>Recompile your kernel and add Virtual memory file system
110   support. Take a look at <A HREF="kernelsupport.html">Linux Kernel support</A> 
111   to see what you're kernel must support. (Of course, if your PC has
112   less than 64MB of RAM, you could always... what's the phrase? I know,
113   upgrade your RAM!)</P>
114  <P ALIGN=LEFT>
115   <A NAME="AEN624"></A><B>Q: </B>When I try to boot from the Mondo CD,
116   it says something about not finding my CD-ROM drive and then it
117   blames the kernel. What does that mean?</P>
118  <P ALIGN=LEFT>
119   <B>A: </B>Your kernel must support initrd, loopfs, IDE CD-ROM's, and
120   ramdisks. Take a look at <A HREF="kernelsupport.html">Linux Kernel support</A> 
121   to see what you're kernel must support. If your kernel does not
122   support these things, Mondo will not boot from your CD. However, when
123   running Mindi, you may choose to use _its_ kernel instead of your
124   own. In addition, you may boot from floppy disk images instead the
125   CD: copy the disk images from the CD /images directory to floppy
126   disks, using 'dd'. Take a look at <A HREF="faqbooting.html#COPYBOOTDATADISK">Copy
127    boot data disks</A> on how to make those.</P>
128  <P ALIGN=LEFT>
129   <A NAME="AEN631"></A><B>Q: </B>The Mondo CD/floppy takes ages to
130   boot. How can I speed it up?</P>
131  <P ALIGN=LEFT>
132   <B>A: </B>Edit mindi (it's a shell script, btw) and change
133   LILO_OPTIONS=&quot;&quot; to LILO_OPTIONS=&quot;-c&quot;. This
134   enables map compaction in lilo and speeds up booting, for more info
135   see the lilo man page.</P>
136  <P ALIGN=LEFT>
137   <A NAME="AEN636"></A><B>Q: </B>I made a Mondo CD using the failsafe
138   kernel (i.e. I said 'no' when Mondo asked if I wanted to use my own
139   kernel). It still doesn't boot. Help!</P>
140  <P ALIGN=LEFT>
141   <B>A: </B>OK, now <I>that</I> is a bug. :-) I included a kernel with
142   Mondo (technically, with Mindi, which Mondo uses) to make sure that
143   users could use Mondo despite flaws in their own kernels. If you are
144   using Mondo/Mindi's kernel but still cannot boot from your Mondo CD
145   then please e-mail the list.</P>
146  <P ALIGN=LEFT>
147   <A NAME="AEN641"></A><B>Q: </B>What if my PC won't boot from a CD?</P>
148  <P ALIGN=LEFT>
149   <B>A: </B>Copy the image files from the CD /images directory, using
150   the dd command. Take a look at <A HREF="faqbooting.html#COPYBOOTDATADISK">Copy
151    boot data disks</A> on how to make those. Then boot from the first
152   floppy; follow it up with the data disks; finally, type 'mount
153   /mnt/cdrom' and then utilize the restore script as usual, e.g. mondorestore.</P>
154  <P ALIGN=LEFT>
155   <A NAME="AEN647"></A><B>Q: </B>But why won't Mondo boot from my CD?
156   It says my kernel is flawed/outdated/ whatever, and when I wrote to
157   you, you told me the same thing... but I still don't get it. I mean,
158   my kernel works for everything else. Why not Mondo?</P>
159  <P ALIGN=LEFT>
160   <B>A: </B>Because Mondo makes a boot disk using your kernel. I bet
161   your other software doesn't do that. Also, not all kernels are
162   suitable for boot disks. I'm sorry but that's Life. Upgrade your
163   kernel and/or recompile it. Take a look at <A HREF="kernelsupport.html">Linux
164    Kernel support</A> to see what you're kernel must support.</P>
165  <P ALIGN=LEFT>
166   <A NAME="AEN653"></A><B>Q: </B>Why do I only need a boot disk if I'm
167   using a tape drive? Where are the data disks?</P>
168  <P ALIGN=LEFT>
169   <B>A: </B>On the tape. :-) The first 32MB of the tape will be set
170   aside for a large tarball containing the data disks, a list of all
171   files backed up, and other sundries. If Mondo and Mindi do their
172   respective jobs then you won't need additional floppies, just the
173   boot floppy and the tape(s).</P>
174  <P ALIGN=LEFT>
175   <A NAME="AEN658"></A><B>Q: </B>Why does it say, &quot;Process
176   accounting FAILED&quot; when I reboot?</P>
177  <P ALIGN=LEFT>
178   <B>A: </B>You were using Process Accounting. Red Hat (or whichever
179   distro you are using) does not provide a startup/shutdown script yet.
180   So, when you try to backup the process log, it just grows and grows
181   as Mondo tries to back it up. Mondo doesn't back it up anymore and
182   that's why. The unfortunate side-effect is... well, what you see on
183   your screen. Type 'touch /var/log/pacct' and then 'paccton' to fix
184   the error message.</P>
185  <P ALIGN=LEFT>
186   <A NAME="AEN663"></A><B>Q: </B>Why does it say,
187   &amp;#8220;request_module[block-major-1]: Root fs not mounted VFS:
188   Cannot open root device &quot;100&quot; or 01:00 Please append a
189   correct &quot;root=&quot; boot option kernel panic: VFS: Unable to
190   mount root fs on 01:00&amp;#8221; when i boot from the CD?</P>
191  <P ALIGN=LEFT>
192   <B>A: </B>Recompile your kernel and add initrd support. Take a look
193   at <A HREF="kernelsupport.html">Linux Kernel support</A>to see what
194   you're kernel must support.</P>
195  <P ALIGN=LEFT>
196   <A NAME="COPYBOOTDATADISK"></A><B>Q: </B>How do i copy boot+data disk
197   images to physical floppy disks ?</P>
198  <P ALIGN=LEFT>
199   <B>A: </B>The images are in /root/images/mindi (eve if they are
200   created by Mondo) and also in the 'images' directory on the first CD
201   of your backup set, if you have backed up to CD. You can copy the
202   images to disk as follows:-</P>
203  <DIV ALIGN=LEFT>
204  <P ALIGN=LEFT>
205   <TABLE WIDTH="100%" CELLPADDING="1" CELLSPACING="2" BORDER="0">
206    <TR>
207     <TD BGCOLOR="#E0E0E0" VALIGN=CENTER><PRE
208        CLASS="PROGRAMLISTING"><FONT
209        COLOR="BLACK">[boot disk]</FONT><BR><FONT
210        COLOR="BLACK">bash# fdformat /dev/fd0u1722</FONT><BR><FONT
211        COLOR="BLACK">bash# dd if=/root/images/mindi/mindi-boot.1722.img of=/dev/fd0u1772</FONT><BR><BR><FONT
212        COLOR="BLACK">[data disk]</FONT><BR><FONT
213        COLOR="BLACK">bash# fdformat /dev/fd0</FONT><BR><FONT
214        COLOR="BLACK">bash# dd if=/root/images/mindi/mindi-data-N.img of=/dev/fd0</FONT><BR><BR><FONT
215        COLOR="BLACK">Replace N with 1, 2, etc. </FONT></TD></TR>
216   </TABLE></P>
217  </DIV>
218  <DL>
219   <P ALIGN=LEFT>
220    <DT CLASS="mvd-P"><A NAME="TAPENICE"></A><B>Q:</B> My tape drive
221    doesn't play nicely with Mondo at boot-time. What do I do?</P>
222   <P ALIGN=LEFT>
223    <DT CLASS="mvd-P"><B>A:</B> Play with 'mt'. Use its setblksize and
224    defblksize switches to reconfigure your tape drive if necessary. Some
225    tape drives just suck, I'm sorry to say. If yours is one of them then
226    God help you. Mondo can handle any tape drive whose drive and
227    firmware can handle fread(), fwrite(), fread() and fclose(). Mondo
228    uses standard C libraries to talk to your tape streamer. If your tape
229    streamer can't handle that then you had better call a priest. Either
230    that or ask for a refund.</P>
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