Grub installed into USB drive: After boot kernel not initializing
Hello All, Today I was doing some testing, how to use grub2 to USB stick. I did how this link install-grub2-on-usb-from-ubuntu-linux<http://www.pendrivelinux.com/install-grub2-on-usb-from-ubuntu-linux/>explains, but didnt do with ubuntu CD did it from my installed ubuntu. After that I copied vmlinuz, initrd, System.map and config to USB drive from my running ubuntu /boot directory. Then booted the USB drive, I have got grub menu. Pressed "c", it took me to grub command line. Here I gave "linux /vmcoreinfo-3.0.0-26-generic-pae" and "initrd initrd.img-3.0.0-26-generic-pae". Then typed boot. Its booted and gave (initramfs) prompt, but didnt boot the kernel. I have two questions here: 1. Why It stopped in initramfs ? why not boot kernel ? 2. I got below Error when installing grub2, so what I need to do ? I partitioned USB with ext4 fs. grub-setup: warn: Attempting to install GRUB to a partitionless disk or to a partition. This is a BAD idea.." -- Regards Jeshwanth Kumar N K +91-7411483498
Hi...... Let's see if I can help... On Sun, Nov 18, 2012 at 10:05 PM, Jeshwanth Kumar N K Jeshu <jeshkumar555@gmail.com> wrote:
Then booted the USB drive, I have got grub menu. Pressed "c", it took me to grub command line. Here I gave "linux /vmcoreinfo-3.0.0-26-generic-pae" and "initrd initrd.img-3.0.0-26-generic-pae". Then typed boot.
Its booted and gave (initramfs) prompt, but didnt boot the kernel.
IIRC, you need to delay the booting, in order for USB sub system to settle and ready for further reading. Unfortunately, I can't recall the exact kernel parameter name....try to google that....
2. I got below Error when installing grub2, so what I need to do ? I partitioned USB with ext4 fs.
grub-setup: warn: Attempting to install GRUB to a partitionless disk or to a partition. This is a BAD idea.."
Hm, not sure...do you actually partition the usb flash disk? -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com
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Jeshwanth Kumar N K Jeshu -
Mulyadi Santosa