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April 17, 2017

Updating Grub

Forums: 

I'm trying to update the grub so i can have two OS on this machine! i'm trying to make appear a row on the grub entry and i'm no getting it! Here's some of the outputs that i'm getting:

sudo grub-install /dev/sda2
Installing for x86_64-efi platform.
Installation finished. No error reported.

sudo update-grub
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.10.0-19-generic
Found initrd image: /boot/initrd.img-4.10.0-19-generic
Adding boot menu entry for EFI firmware configuration
done
 

sudo fdisk -l
Disk /dev/sda: 223,6 GiB, 240057409536 bytes, 468862128 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x4f3e687f

Device     Boot   Start       End   Sectors   Size Id Type
/dev/sda1  *       2048   1026047   1024000   500M  7 HPFS/NTFS/exFAT
/dev/sda2       1026048 468858879 467832832 223,1G  7 HPFS/NTFS/exFAT

Disk /dev/sdb: 931,5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 639A1F6F-2B2A-40D4-896C-6CC8B9CA42C6

Device      Start        End    Sectors   Size Type
/dev/sdb1      34     262177     262144   128M Microsoft reserved
/dev/sdb2  264192 1953523711 1953259520 931,4G Microsoft basic data

Partition 1 does not start on physical sector boundary.

Disk /dev/sdc: 298,1 GiB, 320072933376 bytes, 625142448 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: C1341E80-9CF0-4A92-B4E1-BA5B04FB5415

Device       Start       End   Sectors   Size Type
/dev/sdc1     2048   1050623   1048576   512M EFI System
/dev/sdc2  1050624 625141759 624091136 297,6G Linux filesystem

I'm having a boot flag on dev/sda1, i'm viewing the files on it (i think)! i'm wondering if the boot flag is on the correct device! How can i add that disk to the grub menu on startup?

 

 

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