Monday, January 3, 2022

[SOLVED] make linux machine grub bootable using bootable disk

Issue

I am not familiar to grub, and very less to linux.

What i currently have is the recovered linux machine disk.

Which has grub bootable source machine, but for booting on other platform (hypervisor/cloud)

My team used an extlinux to make it bootable by overwriting its boot code and make that machine bootable on other platform like cloud/hypervisor. Did something like in this link

I want to make that machine grub bootable so i tried and came up with something below:

  • Created 1 gb disk.
  • installed grub using command on fat32 partition using below link

Content of grub.cfg 

menuentry 'usbboot ubuntu'   {   
set root (hd0,1)   
linux (hd1,3)/boot/vmlinuz.efi root=/dev/sdb3  
initrd (hd1,3)/boot/initrd.lz 
}

After that i created vm. Attached 1GB disk first then recovered disk second.

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please help me to resolve issue


Solution

I was able to solve the issue, Issue is their was no such device like /dev/sdb3,It may be due to hypervisor type. So i was trying mount command in BusyBox and i found it their as /dev/vdb3.



Answered By - Dipak
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