Re: Need help with RamDisk Rescue

Lex,

I have been able to get everything installed, and the installed linux
tries to boot now. THanks.

However, now I am getting an error when mounting /dev/mmcblk0p2...

VFS: Cannot open root device "mmcblk0p2" or unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(0,0)

Should my startup.txt use something other than /dev/mmcblk0p2 for the CF
card...?

Mark.

On Mon, 2007-10-29 at 04:50 +0000, Lex Landa wrote:
> Hello Mark,
>
> On Fri, 26 Oct 2007 08:54:40 -0600, "Mark Geib" <mark.geib_at_echostar.com>
> said:
>
> > I have been working to install linux on my 4700 via RamDisk Rescue
> > method. I followed the wiki instructions very carefully, twice !, and
> > everything appears to work correctly, however I have NO files in
> > the /linux directory on my CF card. The /linux directory appears
> > unchanged during the install. I have mounted the ext2 partition on the
> > CF card and it appears to be a good linux install.
> >
> > Can I populate the files in the /linux directory required to run HaRET
> > manually to boot the install.?
>
> I installed my Ramdisk Rescue to an SD card instead of a CF, but it
> should work the same (please correct me if I'm wrong, anyone!).
>
> An 'fdisk -l' of my SD card looks like this:
>
> ---
>
> Disk /dev/sdb: 512 MB, 512229376 bytes
> 16 heads, 62 sectors/track, 1008 cylinders
> Units = cylinders of 992 * 512 = 507904 bytes
> Disk identifier: 0x00096485
>
> Device Boot Start End Blocks Id System
> /dev/sdb1 1 843 418016 b W95 FAT32
> Partition 1 does not end on cylinder boundary.
> /dev/sdb2 * 843 1008 81920+ 83 Linux
> Partition 2 does not end on cylinder boundary.
>
> ---
>
> Partition 1 is formatted with the VFAT filesystem. It contains the
> following directory structure:
>
> 17M ./linux/rescue/image
> 22M ./linux/rescue
> 50M ./linux
> 18M ./My Documents
> 5.2M ./hx4700_wince
> 76K ./MSMETADATA
> 46M ./Backup (Windows backups)
> 176M ./media (music, photos)
> 294M .
> 294M total
>
> I remember that I had the same problem as you, and I needed to copy some
> files manually. I can't remember exactly what I did as it was some time
> ago, so I'll list the linux, linux/rescue and linux/rescue/image
> directories. I think I copied stuff from linux/rescue and
> linux/rescue/image to /linux and edited the startup file
> (/linux/startup.txt) to point to the new zImage.
>
> /linux contains:
>
> total 28020
> -rwx------ 1 lex root 1170 Jan 20 2007 README.txt
> -rwx------ 1 lex root 5084 Jan 20 2007 custom.txt
> -rwx------ 1 lex root 633856 Jan 20 1997 haret-0.3.8.exe
> -rwx------ 1 lex root 5837680 Jan 27 1997 mplayer
> -rwx------ 1 lex root 16084653 Jan 20 2007
> opie-image-v0.8.4-ipaq-pxa270.rootfs.tar.bz2
> -rwx------ 1 lex root 3708760 Jan 20 2007
> ramdisk-rescue-0.6.4.rootfs.ext2.gz
> drwx------ 3 lex root 8192 Jan 20 1997 rescue
> -rwx------ 1 lex root 239 Jan 20 1997 startup.txt
> -rwx------ 1 lex root 1195608 Jan 20 1997 zImage
> -rwx------ 1 lex root 1196044 Jan 20 2007
> zImage-2.6.16-hh5-ipaq-pxa270-20061028021958
>
> /linux/startup.txt:
>
> ---snip---
>
> #
> # HaRET startup.txt for HX4700
> #
> # This file generated by RAMDISK RESCUE 0.6.4
> # http://handhelds.org/moin/moin.cgi/RamdiskRescue
> #
>
> set KERNEL zImage
> set MTYPE 562
> set CMDLINE "root=/dev/mmcblk0p2 console=tty0"
> bootlinux
>
> ---unsnip---
>
> /linux/rescue contains:
>
> -rwx------ 1 lex root 5154 Jan 20 1997 RR-syslog.gz
> -rwx------ 1 lex root 5084 Jan 20 2007 custom.txt
> -rwx------ 1 lex root 633856 Jan 20 2007 haret-0.3.8.exe
> drwx------ 2 lex root 8192 Jan 20 2007 image
> -rwx------ 1 lex root 3708760 Jan 20 2007
> ramdisk-rescue-0.6.4.rootfs.ext2.gz
> -rwx------ 1 lex root 1910 Jan 20 2007 startup.txt
> -rwx------ 1 lex root 1196044 Jan 20 2007
> zImage-2.6.16-hh5-ipaq-pxa270-20061028021958
>
>
> /linux/rescue/startup.txt, without comments:
>
> ---snip---
>
> set KERNEL "zImage-2.6.16-hh5-ipaq-pxa270-20061028021958"
> set INITRD "ramdisk-rescue-0.6.4.rootfs.ext2.gz"
> set MTYPE 562
> set CMDLINE "root=/dev/ram0 ramdisk_size=12288 mem=64M
> console=ttyS0,115200n8 console=tty0"
>
> # And the command that does all the heavy lifting
>
> bootlinux
>
> ---unsnip---
>
> (everything else is commented-out so I haven't included it)
>
> The important thing is startup.txt, which I edited to start Ramdisk
> Rescue if I run HaRET from /linux/rescue, and Linux if I run HaRET from
> /linux. It's a mess, I know.
>
> /linux/rescue/image/:
>
> -rwx------ 1 lex root 16084653 Jan 20 2007
> opie-image-v0.8.4-ipaq-pxa270.rootfs.tar.bz2
> -rwx------ 1 lex root 1195608 Jan 20 2007
> zImage-2.6.15-hh2-ipaq-pxa270-20060923034420
>
> Note that I copied opie-image-v0.8.4-ipaq-pxa270.rootfs.tar.bz2 out of
> the 'image' dir. I think I did this when I initially installed Linux,
> to the second partition on the card. I could delete /linux/rescue/image
> now as the install is complete.
>
> I hope this helps, though it'll probably be more confusing than anything
> - I'm certainly a bit puzzled as to why I did it this way, when I look
> at the structure of the SD card!
>
> Lex.
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> Hx4700-port_at_handhelds.org
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-- 
Principle Engineer
Cheyenne Software Engineering
35-215