Customize alternate install CD with UEFI?

[Liam Proven]

On 20 July 2016 at 21:06, Josef Wolf <jw at raven.inka.de> wrote:

> This is an asus bu201la-dt022g notebook with win8.1 preinstalled. I upgaraded
> to win10 and now I'd like to resize to install ubuntu.
>
> The origial partitions are like this:
>
> Disklabel-Type: gpt
> part      start       end   sectors size   type
> sda1:      2048    206847    204800 100.0m FAT32 ESP    (EFI system)
> sda2:    206848    468991    262144 128.0m ----- MSR    (M$ reserved)
> sda3:    468992 390236111 389767120 185.9g NTFS  Primär (C: M$ basic data)
> sda4: 390236160 391174143    937984 458.0m M$ recovery environment
> sda5: 391174144 924344319 533170176 254.2g MS basic data (D:)
> sda6: 924344320 976773119  52428800  25.0g Win recovery environment

Looking at that, there is no extended partition. That means, I think,
that this must be a drive with GUID partitioning, probably 1TB+.

> My goal is to free as much as possible for ubuntu, but still keep a "usable"
> win10. I don't really need win, it's just for the case...

"In case". :-)

OK. You might want to check from within Windows itself if it's
possible to "officially" remove the recovery data, which would leave
those partitions (mostly) empty.

> Argh! the bad wording comes from the installer. It says:
>
>   "the following drives have mounted partitions: /dev/sda"
>
> The mounted partition is /dev/sda1, the EFI partition from the hard drive.

Ahja! Alles klar!

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