HELP:ERROR when i boot the compiled Kernel

[sirmoreno]

i compiled the linux-2.6.15.4 and i added to the Grub:

title Custom Linux Kernel 2.6.15.4
root (hd0,1)
kernel /boot/bzImage ro root=/dev/hda0 hdc=ide-scsi

and when i boot i get:
VFS: Cannot open root device "hda0" or unknown - block(0,0)
after that a Kernel panic and it just Stops
i tryed to chage it too hda1 or hda2 but it didn't work
Any Help will do
(i read the thread b4 but it didn't work for me)

[spencerf]

well first question is do you have /boot on a seperate partition?

if not: then grub should look like this:

title
root (hd0,1)
kernel /boot/bzimage ro root=/dev/hda2 hdc=ide-scsi

if yes: as /boot is on hda2 and / is hda3 (i'm just guessing here) then grub is:
title
root (hd0,1)
kernel /boot/bzimage ro root=/dev/hda3 hdc=ide-scsi

if this doesn't help then please post your /etc/fstab

[sirmoreno]

i have one Hd and two partitions the linux is in the second one
so i know i have to use root (hd0,1)
the Worknig kernel line look's like this:

title Ubuntu, kernel 2.6.12-10-386
root (hd0,1)
kernel /boot/vmlinuz-2.6.12-10-386 root=/dev/hda2 ro quiet splash
initrd /boot/initrd.img-2.6.12-10-386
savedefault
boot

so i guess i should write:
kernel /boot/bzImage ro root=/dev/hda2 hdc=ide-scsi
but it didn't work

[sirmoreno]

the /etc/fstab:
/etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
/dev/hda2 / ext3 defaults,errors=remount-ro 0 1
/dev/hda5 none swap sw 0 0
/dev/hdc /media/cdrom0 udf,iso9660 user,noauto 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto 0 0

[zappacky]

put this is ur grub config:

title Ubuntu, kernel 2.6.12-10-386
root (hd0,1)
kernel /boot/vmlinuz-2.6.12-10-386 ro quiet splash
initrd /boot/initrd.img-2.6.12-10-386
savedefault
boot

that should boot it

are there any other entries in ur boot file? if so try copying one of them and just changing the version, otherwise try that

[spencerf]

except he made a custom kernel so the name is changed.

when you compiled your custom kernel did you copy it over to /boot

the command usually is

cp arch/i386/boot/bzimage /boot/bzimage (this is just the name you save it to you can name it whatever you want but this name is what you boot in grub.conf or menu.lst

also did you get any error messages you said it didn't work when you changed it but grub usually spits out some sort of error. If it says kernel not found then you didn't copy it over or you have the wrong name.

[tb10alj]

Hmmmm,

maybe the custom kernel is missing the driver for your harddisk controller
(or you compiled this driver as module and you didn't create an initial ramdisk
for this kernel).


regards,
JAN

[sirmoreno]

Hi, thank's for all the Help
but the bug is still on
here's what i did:
1. make menuconfig
2. make dep
3. make clean
4. make bzImage
5. make modules
6. make modules_install
7. cp /usr/src/linux/arch/i386/boot/bzImage /boot/
i tryed too add to the menu.lst all kinds of lines the last one was:

title Custom Linux Kernel 2.6.15.4
root (hd0,1)
kernel /boot/bzImage root=/dev/hda2 ro quiet splash
initrd /boot/bzImage
savedefault
boot

but i got and Error:
VFS unable to mount root fs on un known-block(0,0)

mybe Jan is right but i dont know how to handle:
- the driver for your harddisk controller ??
- or the initial ramdisk for this kernel ??

how can i check and correct this things ??

[svassis]

Hi,

I try to install RTAI in my red hat 9. I'm starter in linux.

I have in my grub.conf:

default=0
timeout=10
splashimage=(hd0,0)/grub/splash.xpm.gz
title Red hat
root(hd0,0)
kernel /vmlinuz-2.4.20-8 ro root=LABEL=/
initrd /initrd-2.4.20-8.img

title RTAILinux
root(hd0,0)
kernel /vmlinuz-2.4.20-rthal5 ro root=/dev/hda2
initrd /initrd-2.4.20-8.img
splash=silent showopts



The error when i try to boot RTAILinux is:

ds: no socket drivers loaded!
EXT2-fs: ide0(3,2): couldn't mount because of unsupported optionnal features (4)
Kernel panic: VFS: Unable to mount root fs on 03:02


What to do please?

[svassis]

Hi,

I try to install RTAI in my red hat 9. I'm starter in linux.

I have in my grub.conf:

default=0
timeout=10
splashimage=(hd0,0)/grub/splash.xpm.gz
title Red hat
root(hd0,0)
kernel /vmlinuz-2.4.20-8 ro root=LABEL=/
initrd /initrd-2.4.20-8.img

title RTAILinux
root(hd0,0)
kernel /vmlinuz-2.4.20-rthal5 ro root=/dev/hda2
initrd /initrd-2.4.20-8.img
splash=silent showopts



The error when i try to boot RTAILinux is:

ds: no socket drivers loaded!
EXT2-fs: ide0(3,2): couldn't mount because of unsupported optionnal features (4)
Kernel panic: VFS: Unable to mount root fs on 03:02


What to do please?