Gentoo Archives: gentoo-user

From: James <wireless@×××××××××××.com>
To: gentoo-user@l.g.o
Subject: [gentoo-user] Re: setting boot flag on sda1
Date: Fri, 05 Sep 2014 19:58:18
Message-Id: loom.20140905T215223-792@post.gmane.org
In Reply to: Re: [gentoo-user] setting boot flag on sda1 by Todd Goodman
1 Todd Goodman <tsg <at> bonedaddy.net> writes:
2
3 > What does 'gdisk -l /dev/sda' say about GPT and MBR (it usually says
4 > whether you have a valid GPT and/or MBR before printing information
5 > about the partitions.)
6
7 gfisk does not seem to be in the tree. That's the old name for the
8 "gptfdisk" now in the portage tree. The name is now consistent
9 with upstream. (/sys-apps/gptfdisk)
10
11
12
13 > As others have mentioned, you need that BIOS boot partition for GRUB2 to
14 > embed its core.img into since there's no post-MBR gap for it to use with
15 > GPT. This is different than the partition you mount as /boot.
16
17 > Your BIOS should be able to boot GPT drives but it can be flaky
18 > depending upon motherboard in my experience.
19
20 > If using GPT drives to boot with BIOS you want a protective MBR which
21 > encompasses the entire drive (or first 2.2TB if the drive is larger than
22 > that as that's as big as MBR can handle.) It has type 0xee.
23
24 > You can create that gdisk (by going into the eXpert menu) or you can use
25 > fdisk to create it.
26
27 Maybe gdisk is on the installation iso? It's not in the portage tree, but
28 it use to be:
29
30 http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/sys-apps/gdisk/?hideattic=0
31
32 gdisk and gptfdisk are the use the be the same software..
33
34
35 hth,
36 JKames

Replies

Subject Author
Re: [gentoo-user] Re: setting boot flag on sda1 Joseph <syscon780@×××××.com>
Re: [gentoo-user] Re: setting boot flag on sda1 Todd Goodman <tsg@×××××××××.net>
Re: [gentoo-user] Re: setting boot flag on sda1 Neil Bothwick <neil@××××××××××.uk>