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Re: major booting issues for a totally blind user trying to boot debian 12.6 and windows 10 pro 64 bits on different drives with uefi booting

Hi, I managed to fix the booting issues by booting into a windows 10 boot usb stick and going to the command prompt with shift and f10 then using diskpart I found the esp partition and assigned a drive letter to it.  After this I used bcdboot to recopy the windows 10 efi files to the esp partition and then booted back into debian.  I then ran update-grub and it found the windows boot manager so now I am able to boot into both windows and debian just fine on different drives.  What installer log file on the debian system can I post to the list so someone can see exactly what I may have done to mess this system up so only debian would boot at first?  Nick Gawronski 

On 10/25/2024 4:05 PM, Pascal Hambourg wrote:

On 25/10/2024 at 22:03, nick@nickgawronski.com wrote:

Hi, Here is the parted print command for /dev/nvme0n1 the linux drive
Model: Samsung SSD 970 EVO Plus 2TB (nvme)
Disk /dev/nvme0n1: 2000GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:

Number  Start   End     Size    File system  Name  Flags
  1      1049kB  538MB   537MB   fat32              boot, esp
  2      538MB   1050MB  512MB   ext2
  3      1050MB  2000GB  1999GB

Model: Samsung SSD 970 EVO Plus 2TB (nvme)
Disk /dev/nvme1n1: 2000GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:

Number  Start   End     Size    File system  Name Flags
  1      1049kB  17.8MB  16.8MB  ext4         Microsoft reserved partition msftres   2      17.8MB  1999GB  1999GB  ntfs         Nick Gawronski's system 76 1 msftdata 
  3      1999GB  2000GB  724MB   ntfs hidden, diag
  4      2000GB  2000GB  557MB   ntfs         Unnamed hidden, diag
  It looks like somehow the esp partition got it's type changed to the ext4 partition type
No, partition 1 is too small for a ESP. As indicated by the name and flag, it is a MSR (Microsoft Reserved Partition). It is not supposed to have any filesystem.
My only guess is that for some reason Windows' ESP was on the other drive and was deleted when you installed Debian on the entire drive. You need to reinstall Windows Boot Manager in the new ESP with a Windows install/repair medium. I do not know if there is another way, e.g. by manually copying specific files to /EFI/Microsoft in the ESP.
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