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#1 2015-10-17 14:45:55

Drawswords
Member
Registered: 2015-10-17
Posts: 2

Windows 8.1 and arch gpt or mbr?

Hello everyone,
I've installed windows 8.1 and want to make dualboot with arch. I got free space on HDD but when I boot arch installation and use gdisk -l /dev/sda the output is:

GPT fdisk (gdisk) version 1.0.0

Partition table scan:
    MBR: MBR only
    BSD: not present
    APM: not present
    GPT: present

Found valid MBR and GPT. Which do you want to use?
  1 - MBR
  2 - GPT
  3 - Create blank GPT

Your answer:

I don't know what to do, and I fear do something  destructive... So what do you suggest?

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#2 2015-10-17 14:48:22

dockland
Member
From: Sweden
Registered: 2015-06-06
Posts: 861

Re: Windows 8.1 and arch gpt or mbr?

Drawswords wrote:

Hello everyone,
I've installed windows 8.1 and want to make dualboot with arch. I got free space on HDD but when I boot arch installation and use gdisk -l /dev/sda the output is:

GPT fdisk (gdisk) version 1.0.0

Partition table scan:
    MBR: MBR only
    BSD: not present
    APM: not present
    GPT: present

Found valid MBR and GPT. Which do you want to use?
  1 - MBR
  2 - GPT
  3 - Create blank GPT

Your answer:

I don't know what to do, and I fear do something  destructive... So what do you suggest?

Follow the steps in this tutorial and you probably will be all set.

https://wiki.archlinux.org/index.php/Wi … _dual_boot

I possess a device, in my pocket, that is capable of accessing the entirety of information known to man.
I use it to look at funny pictures of cats and to argue with strangers.

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#3 2015-10-17 15:10:40

Drawswords
Member
Registered: 2015-10-17
Posts: 2

Re: Windows 8.1 and arch gpt or mbr?

dockland wrote:

Follow the steps in this tutorial and you probably will be all set.
https://wiki.archlinux.org/index.php/Wi … _dual_boot

Yeah, I know it but i can't find the answer for my question on it.

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#4 2015-10-17 15:34:52

olive
Member
From: Belgium
Registered: 2008-06-22
Posts: 1,490

Re: Windows 8.1 and arch gpt or mbr?

It appears your disk is dual partitioned. How have you partitioned your disk in the first place? Dual partitions is a ugly hack that should be avoided. Is the disk you are referencing the disk Windows 8.1 is installed on? Is Windows 8.1 installed in UEFI or in BIOS mode? You won't have helpful answers unless we know a little more what you have.

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#5 2015-10-17 16:38:10

Blasphemist
Member
From: Colorado
Registered: 2013-01-17
Posts: 160

Re: Windows 8.1 and arch gpt or mbr?

If you choose create blank GPT it will create a new partition table and you will loose your windows installation. What is the history of the system? Something has not properly handled partitioning.

I would choose 2. GPT if you have a UEFI system and should have a GUID Partition Table. If that makes windows quit booting, reinstall windows but get the partition table right now before proceeding. Unless you have a BIOS and MBR based system choose 2 or 3 and get the GPT only.

Simple and Open

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#6 2015-10-17 18:26:50

Blasphemist
Member
From: Colorado
Registered: 2013-01-17
Posts: 160

Re: Windows 8.1 and arch gpt or mbr?

If you choose create blank GPT it will create a new partition table and you will loose your windows installation. What is the history of the system? Something has not properly handled partitioning. That's not so unusual as distros change installation tools to work for both BIOS/MBR and UEFI/GPT.

I would choose 2. GPT, if you have a UEFI system and should have a GUID Partition Table. If that makes windows quit booting, reinstall windows but get the partition table right now before proceeding. Unless you have a BIOS and MBR based system choose 2 or 3 and get the GPT only.

Simple and Open

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