Fwd: Re: [pocket-linux] Chapter 3: RAMdisk: Incomplete write

[David Horton]

Your root disk procedure looks fine.  I think your problems may be with 
the kernel boot disk rather than the root disk.  Specifically you might 
be having trouble if ramdisk support is not compiled into the kernel. 
Chapter 2 does not use a compressed root FS, so it would work fine even 
without ramdisk support.


Bettes wrote:
> Hi,
> I survived chapter 02 without using the 'export CC="gcc -mcpu=i386"'
> So I assume I don't need this.
> So my original problem stays the same. :-(
> See bottom
> 
> ----------  Forwarded Message  ----------
> 
> Subject: Re:  [pocket-linux] Chapter 3: RAMdisk: Incomplete write
> Date: Wednesday 12 May 2004 15:58
> From: "David Horton" <dhorton at speakeasy.net>
> To: "Support for Pocket Linux Guide" <pocket-linux at ufo.chicago.il.us>
> 
> The 'export CC="gcc -mcpu=i386"' tells the C compiler to generate code that
>  will run on a 386 processor.  That way you can build a program on a fast 686
>  machine and still run it on an old box.  If you run a program on the same
>  box you build it on then it should not matter if 'export CC="gcc
>  -mcpu=i386"' is used or not.
> 
> Dave
> 
> 
>>-----Original Message-----
>>From: nrh2 at aber.ac.uk [mailto:nrh2 at aber.ac.uk]
>>Sent: Wednesday, May 12, 2004 10:51 AM
>>To: 'Support for Pocket Linux Guide'
>>Subject: Re: [pocket-linux] Chapter 3: RAMdisk: Incomplete write
>>
>>Hi
>>Just read through your script, although i havent done pocket linux in
>>a few months everything looks o.k to me, tho just nitpicking, why
>>havent you included the following line from the 2.1 book
>>
>>export CC="gcc -mcpu=i386"
>>
>>not sure, but that could possibly be your error?
>>
>>(made stupid error similary myself)
>>
>>Nathan
>>
>>
>>>Hi, some more info
>>>
>>>If I use the image disk for ROOT,  I am able to start up.
>>>So I am pretty sure that the error must be somewhere in the root disk
>>>
>>>Here is the script I am using to make the root disk. I am running it
>>>as  root
>>>I hope somebody sees the mistake
>>>
>>>##############START#############
>>>#!/bin/sh
>>>
>>>MPF=/media/floppy
>>>MPR=/media/ramDisk
>>>DBF=/home/bettes/Documents/bash-2.05a
>>>LastPWD=$PWD
>>>
>>>
>>>#Format Ramdisk on ram7
>>>echo "Format RamDisk"
>>>echo "*************"
>>>umount /dev/ram7
>>>dd if=/dev/zero of=/dev/ram7 bs=1k count=4096
>>>mke2fs -m0 /dev/ram7
>>>mount /dev/ram7 /media/ramDisk
>>>
>>>#Compiling sources
>>>echo "Compiling Sources"
>>>echo "********************"
>>>cd $DBF
>>>make distclean
>>>./configure --enable-minimal-config --host=i386-pc-linux-gnu
>>>make
>>>strip bash
>>>
>>>cd $LastPWD
>>>
>>>#create all directories on the ramDisk
>>>echo "Creating Directories"
>>>echo "********************"
>>>mkdir $MPR/bin
>>>mkdir $MPR/dev
>>>mkdir $MPR/lib
>>>
>>>#make the devices in dev
>>>echo "Creating Devices"
>>>echo "****************"
>>>mknod $MPR/dev/console c 5 1
>>>
>>>#copying the files
>>>echo "Copying Files"
>>>echo "*************"
>>>cp $DBF/bash $MPR/bin/
>>>
>>>cd $MPR/bin
>>>ln -s bash sh
>>>cd $LastPWD
>>>
>>>strip --strip-unneeded -o $MPR/lib/libdl.so.2 /lib/libdl.so.2
>>>strip --strip-unneeded -o $MPR/lib/libc.so.6 /lib/libc.so.6
>>>strip --strip-unneeded -o $MPR/lib/ld-linux.so.2 /lib/ld-linux.so.2
>>>
>>>#Setting file permissions
>>>chmod 744 $MPR/lib/*
>>>
>>>#create image of ramDisk
>>>echo "Make RamDisk Image"
>>>echo "******************"
>>>umount /dev/ram7
>>>dd if=/dev/ram7 of=./root_ch3_image bs=1k
>>>
>>>rm ./root_ch3_image.gz
>>>gzip -9 ./root_ch3_image
>>>
>>>#Format floppy
>>>echo "Copy Image to floppy"
>>>echo "********************"
>>>umount /dev/fd0
>>>dd if=./root_ch3_image.gz of=/dev/fd0 bs=1k
>>>
>>>#############END##############
>>>
>>>On Friday 30 April 2004 17:21, Bart wrote:
>>>
>>>>Hi,
>>>>
>>>>I survived chapter 2 and moved to chapter 3.
>>>>I am compiling kernel 2.6.XX and using GRUB as a loader
>>>>
>>>>Now I am having a strange problem
>>>>After the bootdisk has been loaded I get
>>>>
>>>>
>>>>>VFS: Insert root floppy disk to be loaded into RAM disk and press
>>>>
>>>>ENTER
>>>>
>>>>I do that and the next messages are
>>>>
>>>>
>>>>>RAMDISK: Compressed image found at block 0
>>>>>RAMDISK:  Incomplete write (-28 != 32768) 4194304
>>>>>VFS: Insert root floppy and press ENTER
>>>>
>>>>Then I press enter and i got
>>>>
>>>>
>>>>>Kernel panic: VFS: Unable to mount root on fd0
>>>>
>>>>I don't see the mistake. :-(
>>>>
>>>>
>>>>Bettes
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>_______________________________________________
>>>>Pocket-Linux mailing list
>>>>Pocket-Linux at ufo.chicago.il.us
>>>>http://ufo.chicago.il.us/cgi-bin/mailman/listinfo/pocket-linux
>>>
>>>_______________________________________________
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>>>Pocket-Linux at ufo.chicago.il.us
>>>http://ufo.chicago.il.us/cgi-bin/mailman/listinfo/pocket-linux
>>
>>_______________________________________________
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> 
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