BiB wrote: ⤴Mon Jun 27, 2022 3:28 pm
pbear wrote: ⤴Sun Jun 26, 2022 11:50 pm
Unclear what is your objective. And, nothing personal, but I don't watch videos to find out, as there's no way to skim.
Main advantage of GPT is that you no longer have to muck about with extended and logical partitions. If that's the objective, there's no need to worry about booting in UEFI mode. A GPT drive can be used for BIOS boot. Let us know if you're interested and I'll explain how.
Thanks pbear.
Actually:
YES PLEASE
As you may know, the boot loader in BIOS is placed in the MBR (master boot record). Actually, just a pointer is placed there. The rest of the boot loader goes in a gap between the MBR and the first partition. Problem is, a GPT disk doesn't have an MBR. Instead we use a special
BIOS boot partition which serves the same function. Indeed, the installer doesn't need to be told you're using a BBP; it just works.
There are several ways to create a BBP. The one I use is this. Boot a live session (same thing you use to install). Open GParted (from Menu). Usually you place both the BBP and the system on sda, but can select another from a dropdown in upper right if appropriate. From the Device menu, select Create Partition Table; from dropdown menu, select table type
gpt; click Apply. From the Partition menu, select New; tab to New Size, enter
2 (that's right, the BBP is only 2 MB, and only a small fraction of this actually gets used); tab again and all the remaining space will pop up as Free Space; from dropdown menu for File system, select
unformatted (last item on the list, you'll have to scroll down); click Add; click the check mark below Menu to apply changes. Once done, right-click the partition, select
manage flags, and tick box for
bios-grub. While you have GParted open, might as well set up your system partition (and any others you plan to use); don't forget to Apply the changes before closing GParted.
As far as I know, when you install, you're going to have to use the Something Else method, rather than the default Erase-and-Install method. You want to do that anyway, though, because of a bug in the installer. Happily, it's
not difficult.
Let me know if you have any questions.
Note: All this information is for installation in LM20. In LM21, expected in a month or so, the procedure likely will be much simpler. As discussed in the thread linked above, Ubuntu 22.04 automatically uses a GPT + BBP setup for Erase & Install in BIOS mode. LM21 almost certainly will do the same. If so, there will be no need to pre-format the drive or use manual installation. OTOH, it will still be required from more complex partition schemes.
Dear Guys, 
Hello again,