On 8/18/25 00:31, Van Snyder wrote:
On Sun, 2025-08-17 at 15:49 -0400, Felix Miata wrote:https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1090829 grub-efi fails to install with Input/output errorThe twelve-year-old answer I found was to make sure the EFI partition was FAT32 (mine was), at least 100 MB (mine was 500 MB), and within the first 100 GB on the drive. Mine was last on a 1 TB drive. When I rearranged things using gparted and put the UEFI partition early enough, the installer worked. Is this an unavoidable intrinsic problem with UEFI, or is it a twelve- year-old bug in grub-install or grub-mkconfig — or whatever the Debian installer uses?
I am used to seeing the ESP as the first partition on a disk, so your previous post caught my eye:
On 8/17/25 15:03, Van Snyder wrote: > fdisk -l > ... > Device Boot Start End Sectors Size Id Type > ...> /dev/nvme0n1p8 * 193429504 194545663 1116160 545M ef EFI (FAT-12/16/32)
But, that partition is within the first 100 GB and within the first 100 GiB: 2025-08-18 06:42:31 dpchrist@laalaa ~ $ perl -e 'print 194545663*512/1000/1000/1000, $/' 99.607379456 2025-08-18 06:41:47 dpchrist@laalaa ~ $ perl -e 'print 194545663*512/1024/1024/1024, $/' 92.7666010856628 Do you have a URL for the ESP specifications that you mention? David