On Mon 18 Aug 2025 at 00:31:13 (-0700), Van Snyder wrote: > On Sun, 2025-08-17 at 15:49 -0400, Felix Miata wrote: > > Van Snyder composed on 2025-08-17 12:31 (UTC-0700): > > > > > I found a page that says "The error has been seen when the > > > /EFI/ubuntu > > > directory is corrupted (bug 1090829)." Of course, I'm trying to > > > install > > > Debian but maybe there's a clue there — if only I knew where to > > > read > > > about bug 1090829. > > > > https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1090829 > > grub-efi fails to install with Input/output error > > The 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 don't think you've posted your new layout, so I'm only guessing. It's not the size of the disk (<2TB), but you did have the EFI in a logical partition, not a primary one. AFAIK that's not necessarily out of specification, but it might not be supported by your particular machine's firmware. Cheers, David.
