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 Post subject: Grub error for Bare Bones OS.
PostPosted: Sun Apr 26, 2015 8:36 am 
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Joined: Fri Apr 24, 2015 1:25 pm
Posts: 14
Hi,

I created the small OS mentioned in http://wiki.osdev.org/Bare_Bones.
It is working fine in QEMU.
But when I create its bootable usb using
Code:
sudo dd if=myos.iso of=/dev/sdb && sync

it doesn't load correctly during booting. Though it is able to detect the flash drive, It throws error
disk is not loaded ,going to grub rescue mode.

What to do next?


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 Post subject: Re: Grub error for Bare Bones OS.
PostPosted: Sun Apr 26, 2015 9:10 am 
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Joined: Sat Mar 31, 2012 3:07 am
Posts: 3976
Location: Chichester, UK
Google "Create bootable USB from ISO".

And can I respectfully suggest that Google is a good starting point for relatively trivial queries.


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 Post subject: Re: Grub error for Bare Bones OS.
PostPosted: Sun Apr 26, 2015 10:44 am 
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Joined: Fri Apr 24, 2015 1:25 pm
Posts: 14
I got unetbootin and I made a bootable disk :)
But now When I select the OS from usb, it does nothing.
The selection menu doesn't go away. I can select it again and again, nothing happens. :(


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 Post subject: Re: Grub error for Bare Bones OS.
PostPosted: Thu May 07, 2015 5:23 pm 
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Joined: Wed May 06, 2015 12:13 pm
Posts: 3
When I burn my iso to usb, I usually run with -bs specified.

Specifically I run
Code:
dd if=myos.iso of=/dev/sdx bs=4M

Of course /dev/sdx is the device to write the image to.

I usually insert this a script after I wrote to /dev/sda several times late at night.


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 Post subject: Re: Grub error for Bare Bones OS.
PostPosted: Thu May 07, 2015 9:54 pm 
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Joined: Sun Sep 21, 2014 7:16 am
Posts: 104
This is pretty easy.

1. Make a partition table and a partition on the USB pen drive.
2. Create a file system on the partition.
3. Mount the created partition.
4. Copy your files (kernel, etc.) there.
5. Unmount.
6. Install GRUB on the USB pen drive (not partition) using grub2-install (or maybe grub-install, as in Ubuntu).
7. Reboot and boot from the USB pen drive.


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