How do I convert my linux disk from MBR to GPT with UEFI? Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern) Come Celebrate our 10 Year Anniversary!Clonezilla restore MBR disk to 4TB disk (convert to GPT) — LINUX (not Windows!)How to correctly mount GPT partitions that might have originated on either Linux or WindowsConvert MBR to GPT partition formatCentOS 6 installation crashes when trying to boot media from BIOS set to UEFI modeDoes Windows Hyper-V Server 2012 support UEFI clients?BIOS to UEFI no backup restore possible?Installing Server 2012R2 on VM with GPT harddrive issuesDeploying windows 7 in UEFI GPT mode via WDSHow can I quickly clear GPT partition data from a disk?How to convert MBR to GPT and change from BIOS/legacy boot to UEFIWhat are the steps to convert an EBS boot volume from MBR to GPT without data loss? (Using Ubuntu)
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How do I convert my linux disk from MBR to GPT with UEFI?
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)
Come Celebrate our 10 Year Anniversary!Clonezilla restore MBR disk to 4TB disk (convert to GPT) — LINUX (not Windows!)How to correctly mount GPT partitions that might have originated on either Linux or WindowsConvert MBR to GPT partition formatCentOS 6 installation crashes when trying to boot media from BIOS set to UEFI modeDoes Windows Hyper-V Server 2012 support UEFI clients?BIOS to UEFI no backup restore possible?Installing Server 2012R2 on VM with GPT harddrive issuesDeploying windows 7 in UEFI GPT mode via WDSHow can I quickly clear GPT partition data from a disk?How to convert MBR to GPT and change from BIOS/legacy boot to UEFIWhat are the steps to convert an EBS boot volume from MBR to GPT without data loss? (Using Ubuntu)
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I have a linux box (Ubuntu 16.04) whose boot disk is partitioned using MBR. How can I convert it to GPT+UEFI?
linux uefi gpt mbr
asked Apr 15 at 19:40
Chris JonesChris Jones
1406
add a comment |
I have a linux box (Ubuntu 16.04) whose boot disk is partitioned using MBR. How can I convert it to GPT+UEFI?
linux uefi gpt mbr
asked Apr 15 at 19:40
Chris JonesChris Jones
1406
add a comment |
I have a linux box (Ubuntu 16.04) whose boot disk is partitioned using MBR. How can I convert it to GPT+UEFI?
linux uefi gpt mbr
asked Apr 15 at 19:40
Chris JonesChris Jones
1406
I have a linux box (Ubuntu 16.04) whose boot disk is partitioned using MBR. How can I convert it to GPT+UEFI?
linux uefi gpt mbr
linux uefi gpt mbr
asked Apr 15 at 19:40
Chris JonesChris Jones
1406
asked Apr 15 at 19:40
Chris JonesChris Jones
1406
asked Apr 15 at 19:40
Chris JonesChris Jones
1406
asked Apr 15 at 19:40
Chris JonesChris Jones
1406
asked Apr 15 at 19:40
Chris JonesChris Jones
1406
1406
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Before starting, make sure you have a backup, and make sure to have a linux live boot ready to rescue your system. It's easy to mess this up!
- Use gdisk to convert the partition table to GPT.
gdisk /dev/sda - Create the "BIOS boot" partition that GRUB needs.
nto create a new partition. Needs to be about 1MB. You can probably squeeze this in from sectors 34-2047. UseLorlto look up the code for "BIOS boot" (ef02). - Write the new partition table.
w - Reload the partition table.
partprobe /dev/sda Re-install the GRUB boot loader using the new partition scheme.
grub-install /dev/sdaOptionally reboot to verify it's working. If you just need GPT and not UEFI, you can stop here.
- Use gdisk to add an "EFI System" partition (ESP). Officially should be 100-500MB, but mine only used 130kB. Can be anywhere on the disk, so consider putting it at the end if you're using non-resizable media like a physical disk.
gdisk /dev/sdaand usento create the partition. - Give the ESP a distinctive label without whitespace like
EFI-system, because we'll reference the partition label in fstab.
cto set the label. - Write the partition table.
w - Reload the partition table.
partprobe /dev/sda - Build the filesystem for the ESP.
mkfs -t vfat -v /dev/disk/by-partlabel/EFI-system - Create the ESP mount point.
mkdir /boot/efi - Add the ESP to
/etc/fstab. It should look like this:
/dev/disk/by-partlabel/EFI-system /boot/efi vfat defaults 0 2
- Mount the ESP.
mount /boot/efi - Install the GRUB EFI bootloader.
grub-install --target=x86_64-efi /dev/sda - Reboot.
- Change the BIOS from BIOS boot to UEFI boot.
- Use the one-time boot menu to force boot the disk. You may have to navigate to the disk ->
EFI->ubuntu->grubx64.efi. - Re-install GRUB's EFI bootloader to update the UEFI boot selector.
grub-install
Resources:
- The author of GPT has a verbose description of MBR, GPT, and UEFI.
Clonezilla restore MBR disk to 4TB disk (convert to GPT) -- LINUX (not Windows!) covers the first part of the process.
answered Apr 15 at 19:40
Chris JonesChris Jones
1406
The BIOS boot partition is only needed for doing legacy boot on a GPT partitioned disk. If you boot with UEFI, it is not needed and will not be used.
– Michael Hampton♦
Apr 16 at 1:40
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Before starting, make sure you have a backup, and make sure to have a linux live boot ready to rescue your system. It's easy to mess this up!
- Use gdisk to convert the partition table to GPT.
gdisk /dev/sda - Create the "BIOS boot" partition that GRUB needs.
nto create a new partition. Needs to be about 1MB. You can probably squeeze this in from sectors 34-2047. UseLorlto look up the code for "BIOS boot" (ef02). - Write the new partition table.
w - Reload the partition table.
partprobe /dev/sda Re-install the GRUB boot loader using the new partition scheme.
grub-install /dev/sdaOptionally reboot to verify it's working. If you just need GPT and not UEFI, you can stop here.
- Use gdisk to add an "EFI System" partition (ESP). Officially should be 100-500MB, but mine only used 130kB. Can be anywhere on the disk, so consider putting it at the end if you're using non-resizable media like a physical disk.
gdisk /dev/sdaand usento create the partition. - Give the ESP a distinctive label without whitespace like
EFI-system, because we'll reference the partition label in fstab.
cto set the label. - Write the partition table.
w - Reload the partition table.
partprobe /dev/sda - Build the filesystem for the ESP.
mkfs -t vfat -v /dev/disk/by-partlabel/EFI-system - Create the ESP mount point.
mkdir /boot/efi - Add the ESP to
/etc/fstab. It should look like this:
/dev/disk/by-partlabel/EFI-system /boot/efi vfat defaults 0 2
- Mount the ESP.
mount /boot/efi - Install the GRUB EFI bootloader.
grub-install --target=x86_64-efi /dev/sda - Reboot.
- Change the BIOS from BIOS boot to UEFI boot.
- Use the one-time boot menu to force boot the disk. You may have to navigate to the disk ->
EFI->ubuntu->grubx64.efi. - Re-install GRUB's EFI bootloader to update the UEFI boot selector.
grub-install
Resources:
- The author of GPT has a verbose description of MBR, GPT, and UEFI.
Clonezilla restore MBR disk to 4TB disk (convert to GPT) -- LINUX (not Windows!) covers the first part of the process.
answered Apr 15 at 19:40
Chris JonesChris Jones
1406
The BIOS boot partition is only needed for doing legacy boot on a GPT partitioned disk. If you boot with UEFI, it is not needed and will not be used.
– Michael Hampton♦
Apr 16 at 1:40
add a comment |
Before starting, make sure you have a backup, and make sure to have a linux live boot ready to rescue your system. It's easy to mess this up!
- Use gdisk to convert the partition table to GPT.
gdisk /dev/sda - Create the "BIOS boot" partition that GRUB needs.
nto create a new partition. Needs to be about 1MB. You can probably squeeze this in from sectors 34-2047. UseLorlto look up the code for "BIOS boot" (ef02). - Write the new partition table.
w - Reload the partition table.
partprobe /dev/sda Re-install the GRUB boot loader using the new partition scheme.
grub-install /dev/sdaOptionally reboot to verify it's working. If you just need GPT and not UEFI, you can stop here.
- Use gdisk to add an "EFI System" partition (ESP). Officially should be 100-500MB, but mine only used 130kB. Can be anywhere on the disk, so consider putting it at the end if you're using non-resizable media like a physical disk.
gdisk /dev/sdaand usento create the partition. - Give the ESP a distinctive label without whitespace like
EFI-system, because we'll reference the partition label in fstab.
cto set the label. - Write the partition table.
w - Reload the partition table.
partprobe /dev/sda - Build the filesystem for the ESP.
mkfs -t vfat -v /dev/disk/by-partlabel/EFI-system - Create the ESP mount point.
mkdir /boot/efi - Add the ESP to
/etc/fstab. It should look like this:
/dev/disk/by-partlabel/EFI-system /boot/efi vfat defaults 0 2
- Mount the ESP.
mount /boot/efi - Install the GRUB EFI bootloader.
grub-install --target=x86_64-efi /dev/sda - Reboot.
- Change the BIOS from BIOS boot to UEFI boot.
- Use the one-time boot menu to force boot the disk. You may have to navigate to the disk ->
EFI->ubuntu->grubx64.efi. - Re-install GRUB's EFI bootloader to update the UEFI boot selector.
grub-install
Resources:
- The author of GPT has a verbose description of MBR, GPT, and UEFI.
Clonezilla restore MBR disk to 4TB disk (convert to GPT) -- LINUX (not Windows!) covers the first part of the process.
answered Apr 15 at 19:40
Chris JonesChris Jones
1406
The BIOS boot partition is only needed for doing legacy boot on a GPT partitioned disk. If you boot with UEFI, it is not needed and will not be used.
– Michael Hampton♦
Apr 16 at 1:40
add a comment |
Before starting, make sure you have a backup, and make sure to have a linux live boot ready to rescue your system. It's easy to mess this up!
- Use gdisk to convert the partition table to GPT.
gdisk /dev/sda - Create the "BIOS boot" partition that GRUB needs.
nto create a new partition. Needs to be about 1MB. You can probably squeeze this in from sectors 34-2047. UseLorlto look up the code for "BIOS boot" (ef02). - Write the new partition table.
w - Reload the partition table.
partprobe /dev/sda Re-install the GRUB boot loader using the new partition scheme.
grub-install /dev/sdaOptionally reboot to verify it's working. If you just need GPT and not UEFI, you can stop here.
- Use gdisk to add an "EFI System" partition (ESP). Officially should be 100-500MB, but mine only used 130kB. Can be anywhere on the disk, so consider putting it at the end if you're using non-resizable media like a physical disk.
gdisk /dev/sdaand usento create the partition. - Give the ESP a distinctive label without whitespace like
EFI-system, because we'll reference the partition label in fstab.
cto set the label. - Write the partition table.
w - Reload the partition table.
partprobe /dev/sda - Build the filesystem for the ESP.
mkfs -t vfat -v /dev/disk/by-partlabel/EFI-system - Create the ESP mount point.
mkdir /boot/efi - Add the ESP to
/etc/fstab. It should look like this:
/dev/disk/by-partlabel/EFI-system /boot/efi vfat defaults 0 2
- Mount the ESP.
mount /boot/efi - Install the GRUB EFI bootloader.
grub-install --target=x86_64-efi /dev/sda - Reboot.
- Change the BIOS from BIOS boot to UEFI boot.
- Use the one-time boot menu to force boot the disk. You may have to navigate to the disk ->
EFI->ubuntu->grubx64.efi. - Re-install GRUB's EFI bootloader to update the UEFI boot selector.
grub-install
Resources:
- The author of GPT has a verbose description of MBR, GPT, and UEFI.
Clonezilla restore MBR disk to 4TB disk (convert to GPT) -- LINUX (not Windows!) covers the first part of the process.
answered Apr 15 at 19:40
Chris JonesChris Jones
1406
Before starting, make sure you have a backup, and make sure to have a linux live boot ready to rescue your system. It's easy to mess this up!
- Use gdisk to convert the partition table to GPT.
gdisk /dev/sda - Create the "BIOS boot" partition that GRUB needs.
nto create a new partition. Needs to be about 1MB. You can probably squeeze this in from sectors 34-2047. UseLorlto look up the code for "BIOS boot" (ef02). - Write the new partition table.
w - Reload the partition table.
partprobe /dev/sda Re-install the GRUB boot loader using the new partition scheme.
grub-install /dev/sdaOptionally reboot to verify it's working. If you just need GPT and not UEFI, you can stop here.
- Use gdisk to add an "EFI System" partition (ESP). Officially should be 100-500MB, but mine only used 130kB. Can be anywhere on the disk, so consider putting it at the end if you're using non-resizable media like a physical disk.
gdisk /dev/sdaand usento create the partition. - Give the ESP a distinctive label without whitespace like
EFI-system, because we'll reference the partition label in fstab.
cto set the label. - Write the partition table.
w - Reload the partition table.
partprobe /dev/sda - Build the filesystem for the ESP.
mkfs -t vfat -v /dev/disk/by-partlabel/EFI-system - Create the ESP mount point.
mkdir /boot/efi - Add the ESP to
/etc/fstab. It should look like this:
/dev/disk/by-partlabel/EFI-system /boot/efi vfat defaults 0 2
- Mount the ESP.
mount /boot/efi - Install the GRUB EFI bootloader.
grub-install --target=x86_64-efi /dev/sda - Reboot.
- Change the BIOS from BIOS boot to UEFI boot.
- Use the one-time boot menu to force boot the disk. You may have to navigate to the disk ->
EFI->ubuntu->grubx64.efi. - Re-install GRUB's EFI bootloader to update the UEFI boot selector.
grub-install
Resources:
- The author of GPT has a verbose description of MBR, GPT, and UEFI.
Clonezilla restore MBR disk to 4TB disk (convert to GPT) -- LINUX (not Windows!) covers the first part of the process.
answered Apr 15 at 19:40
Chris JonesChris Jones
1406
answered Apr 15 at 19:40
Chris JonesChris Jones
1406
answered Apr 15 at 19:40
Chris JonesChris Jones
1406
answered Apr 15 at 19:40
Chris JonesChris Jones
1406
1406
The BIOS boot partition is only needed for doing legacy boot on a GPT partitioned disk. If you boot with UEFI, it is not needed and will not be used.
– Michael Hampton♦
Apr 16 at 1:40
add a comment |
The BIOS boot partition is only needed for doing legacy boot on a GPT partitioned disk. If you boot with UEFI, it is not needed and will not be used.
– Michael Hampton♦
Apr 16 at 1:40
The BIOS boot partition is only needed for doing legacy boot on a GPT partitioned disk. If you boot with UEFI, it is not needed and will not be used.
– Michael Hampton♦
Apr 16 at 1:40
The BIOS boot partition is only needed for doing legacy boot on a GPT partitioned disk. If you boot with UEFI, it is not needed and will not be used.
– Michael Hampton♦
Apr 16 at 1:40
add a comment |
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