Gentoo Archives: gentoo-user

From: Alan McKinnon <alan.mckinnon@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Re: Changing boot device with 2.6.36
Date: Mon, 03 Jan 2011 21:06:51
Message-Id: 201101032305.33532.alan.mckinnon@gmail.com
In Reply to: [gentoo-user] Re: Changing boot device with 2.6.36 by "Jörg Schaible"
1 Apparently, though unproven, at 21:36 on Monday 03 January 2011, Jörg Schaible
2 did opine thusly:
3
4 > Nikos Chantziaras wrote:
5 > > On 01/03/2011 07:43 PM, Jörg Schaible wrote:
6 > >> Hi,
7 > >>
8 > >> starting with the 2.6.36-r5 kernel of the Gentoo sources my boot device
9 > >> changes. With 2.6.35 and below it is alway /dev/sda3, with the new
10 > >> kernel it seems that anything that is internally connected with USB is
11 > >> assigned a device first. Since my computer has an internal media bay
12 > >> (and my monitor has such a thing also) the first HD moves - it I take
13 > >> care it is now /dev/sde3. However, if I forget to switch on the monitor
14 > >> and do this later or if an USB stick is already plugged in at boot
15 > >> time, the HD gets a different device number again.
16 > >>
17 > >> Can somebody else confirm such a behaviour with the 2.6.36 kernel and
18 > >> how can this brought back to normal operation?
19 > >
20 > > This has been solved long ago: Label your filesystems and mount them by
21 > > label.
22 >
23 > I did this long ago, therefore I can switch between the old and new kernel
24 > easily.
25 >
26 > > For example, don't put "/dev/sda3" in your fstab, but label that
27 > > filesystem with a name like "root_fs" and use
28 > > "/dev/disk/by-label/root_fs" in fstab.
29 > >
30 > > Ext2/3/4 filesystem can be labeled with the "e2label" tool. For example:
31 > > e2label /dev/sda3 root_fs
32 > >
33 > > After that, modify your fstab accordingly.
34 >
35 > And how does this help the kernel to find the root device where /etc/fstab
36 > is located ?
37
38 Does
39
40 boot=LABEL=<boot_device_label>
41
42 in grub config work for you?
43
44 --
45 alan dot mckinnon at gmail dot com

Replies

Subject Author
[gentoo-user] Re: Re: Changing boot device with 2.6.36 "Jörg Schaible" <joerg.schaible@×××.de>