Contents
How do I chainload GRUB2 to another disk?
Then have GRUB2 installed on the partition instead of in the MBR itself so that GRUB2 is chainloaded. When Windows (or another MS DOS based boot loader) is installed on another disk, then regular chainloading in the grub.cfg may be sufficient to boot it.
When to use regular chainloading in grub.cfg?
Windows (MSDOS based boot loaders) When Windows (or another MS DOS based boot loader) is installed on another disk, then regular chainloading in the grub.cfg may be sufficient to boot it. However, if Windows is on the same disk on a different partition, or if regular chainloading doesn’t work, then read on.
Is there a way to chainload GRUB from UEFI?
The GNU GRUB documentation doesn’t even mention UEFI, and the Arch/Ubuntu/Gentoo wikis provide the bare minimal info to set up a basic (non-chainloading) install. I’ve installed GRUB onto my ESP using grub-install and grub-mkconfig .Test boot works. This means my /boot/grub folder is empty, and my ESP doesn’t need to be mounted during/after boot.
When do you need to remap chainloading Gentoo bootloader?
The remapping may not be necessary if the system has a single boot disk. The mapping is necessary before chainloading TrueCrypt bootloader in the case that the boot disk (hd1 as shown in the example above) should appear as the primary boot device (hd0), otherwise TrueCrypt would fail to boot because the correct disk will not be found.
How does the GRUB 2 boot loader work?
GRUB 2 understands the formats of file systems and kernel executables, which allows it to load an arbitrary operating system without needing to know the exact location of the kernel on the boot device. GRUB 2 requires only the file name and drive partitions to load a kernel.
Why does GRUB2 not boot with Gentoo LiveCD?
Without kernel cmdline options, booting ISO images with GRUB2 will fail in the physical media check/test stage of the ISOs boot process. Gentoo liveCD is handy because it has a minimal shell which lets the user mount the squashed image to the correct location and then press the Esc key to continue the boot process.
Is there a way to dual boot with GRUB2?
Sometimes it is necessary in the BIOS firmware configuration tool to disable UEFI mode completely in order to force BIOS MBR mode. The simplest way to dual boot Windows (or MS-DOS) is to add an MBR menu entry to GRUB2’s grub.cfg file for each Windows operating system installed.
How does Grub dual boot to another hard disk?
I used EasyBCD in the sda Windows to set up dual-boot between the two Windowses. Then I set Grub as my main bootloader, and had it either boot one of the Linuxes, or chainload to the sda Windows (the Grub is on the same disk).
Can a Linux boot from a GRUB2 bootloader?
I normally write grub.cfg manually and never use update-grub and have a so called master Grub2 bootloader where i choose from where to boot from, then i let each linux distro to install its own bootloader on its own root partition, so linux can edit its own bootloader without touching my master grub2 bootloader.
What’s the difference between GRUB Legacy and GRUB4DOS?
GRUB4DOS has an interface very similar to GRUB Legacy and a menu.lst entry which can be used to chainload the TrueCrypt bootloader or to boot a rescue CD (from an encrypted partition on the same disk).
How does GRUB2 automatically find root partitions?
GRUB2 is capable of automatically finding Windows partitions and assigning the root partitions. The Windows partition must first be mounted before the probe will be successful.