-----Original Message-----
>From: Pascal Hambourg
>Sent: Nov 19, 2017 3:26 PM
>To: "debian-user@lists.debian.org"
>Subject: Re: Installer Can Not Find Root
>
>Le 19/11/2017 à 20:02, Dan Norton a écrit :
>> -----Original Message-----
>>>From: Pascal Hambourg
>>>Sent: Nov 19, 2017 11:03 AM
>>>To: "debian-user@lists.debian.org"
>>>Subject: Re: Installer Can Not Find Root
>>>
>>>Le 19/11/2017 à 03:26, Dan Norton a écrit :
>>>
>>>> user@debian:/$ sudo mount /dev/debian-vg/root
>>>
>>>The mount point is missing. Besides, why did you mount the filesystem ?
>
>No reply to this question ?
>
Unintentional. This was to try to define root.
>>>> #the "/root" was dropped apparently
>>>
>>>What do you mean ?
>>>
>>
>> Simply that
>> sudo mount /dev/debian-vg/root
>> was processed as
>> sudo mount /dev/debian-vg
>
>No it wasn't. Unless a mount point was defined for /dev/debian-vg/root
>in /etc/fstab, this command is invalid and had no effect except to print
>an error message.
>
The effect was that I could cd to it and ls it.
>>>> There they are. All the logical volumes.
>
>/dev/debian-vg is a directory created by LVM when the volume group
>debian-vg is activated. What you see in this directory is not a mounted
>filesystem but device nodes for its logical volumes (actually, symbolic
>links pointing to the real device nodes /dev/dm-*).
>
>> OK, in the installer, logical volumes selected and mount points defined for /,
>> /home, swap, /tmp, and /var.
>> Thank you, Pascal. That's progress.
>>
>> Now I have a problem with the EFI partition. I made several attempts with
>> primary partitions. The last is:
>>
>> #1 primary 1.0MB F fat32 /dos
>
>What is the purpose of this partition ?
>
>> #2 primary 8.6GB B K ESP
>>
>> "The attempt to mount a file system with type vfat in SCSI1 (0,0,0), partition
>> #2(sda) at /boot/efi failed."
>
>In your original post, partition #2 was identified as a swap. Allocating
>8 GB to an EFI system partition which must contain less than 1 MB of
>files is just a waste.
>
OK. This size was copied from a previous installation.
>What is the contents type of this partition ? You can check with blkid.
>An EFI system partition should contain a FAT filesystem and be mounted
>on /boot/efi.
>
>> The goal is to multiboot with grub among several Debian partitions.
>
>You're going into trouble installing several instances of Debian in EFI
>mode. They will all install their own GRUB EFI in the same place in the
>EFI system partition and overwrite the previous one. AFAIK, only manual
>GRUB installation can avoid this by forcing a different identifier for
>each instance. Or you must not install GRUB with the other instances.
>
OK, I see your point. The option to install GRUB or not is in the installer?
I'd like to try gpt again, if the following is still valid:
https://lists.debian.org/debian-user/2014/03/msg01376.html