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uefi boot install and disk partitions



Hi,

 

I have been creating a small (300MB) primary /boot partition at the beginning of the disk for as long as I can remember... That is after disks got to be too big for the BIOS to reach all of the disk to be able to boot from a file anywhere on the disk.

So far so good, that still works but.... do I still need that partition when I create an EFI System Partition (ESP) to boot using UEFI?

 

The automatic disk partitioning created a 500M EFI partition that only has 5M files on it, on my 300M boot partition are another 49M files.

If I had not created that /boot partition would those files be in /boot folder on the / (root) partition or would /boot then be on the EFI partition?

Do I still need that /boot partition now that the ESP has the boot flag set?

Do I still want it?

 

The current layout of my 1TB SSD on which I still have some free space inside my LVM vgroup.

root@linbobo:~# df -h

Filesystem                    Size  Used Avail Use% Mounted on

udev                          7.8G     0  7.8G   0% /dev

tmpfs                         1.6G  8.9M  1.6G   1% /run

/dev/mapper/linbobo--vg-root   23G  815M   21G   4% /

tmpfs                         7.8G     0  7.8G   0% /dev/shm

tmpfs                         5.0M     0  5.0M   0% /run/lock

tmpfs                         7.8G     0  7.8G   0% /sys/fs/cgroup

/dev/sda2                     237M   49M  176M  22% /boot

/dev/mapper/linbobo--vg-var   9.2G  188M  8.5G   3% /var

/dev/mapper/linbobo--vg-tmp   1.8G  5.6M  1.7G   1% /tmp

/dev/sda1                     511M  5.1M  506M   1% /boot/efi

/dev/mapper/linbobo--vg-home  500G   73M  474G   1% /home

tmpfs                         1.6G     0  1.6G   0% /run/user/0

tmpfs                         1.6G     0  1.6G   0% /run/user/1000

 

I read https://wiki.debian.org/UEFI but that does not answer my questions above.

 

Bonno Bloksma

 


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