Gentoo Archives: gentoo-user

From: Alexander Kapshuk <alexander.kapshuk@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] re: can't find /boot/grub/grub.conf after kernel upgrade [3.10.7]
Date: Sat, 07 Sep 2013 18:53:30
Message-Id: 522B7628.3000303@gmail.com
In Reply to: Re: [gentoo-user] re: can't find /boot/grub/grub.conf after kernel upgrade [3.10.7] by "Canek Peláez Valdés"
1 On 09/07/2013 09:35 PM, Canek Peláez Valdés wrote:
2 > On Sat, Sep 7, 2013 at 1:24 PM, Alexander Kapshuk
3 > <alexander.kapshuk@×××××.com> wrote:
4 >> On 09/07/2013 09:11 PM, Canek Peláez Valdés wrote:
5 >>> On Sat, Sep 7, 2013 at 1:06 PM, Alexander Kapshuk
6 >>> <alexander.kapshuk@×××××.com> wrote:
7 >>>> Howdy,
8 >>>>
9 >>>> Just compiled the new kernel [3.10.7], was about to edit my
10 >>>> /boot/grub/grub.conf, and found it missing:
11 >>>> box0 boot # pwd
12 >>>> /boot
13 >>>> box0 boot # ls -a
14 >>>> . .. kernel-3.10.7-gentoo kernel-3.8.13-gentoo
15 >>>>
16 >>>> What did I miss?
17 >>> Do you have /boot in a separated partition? Did you mounted it?
18 >>>
19 >>> Nothing should touch /boot, AFAIK.
20 >>>
21 >>> Regards.
22 >> I do have '/boot' on a separate partition. If I understand it correctly,
23 >> '/boot' gets mounted every time at system start-up, based on
24 >> '/etc/fstab', does it not?
25 > By the contents of your fstab, it should...
26 >
27 >> box0 boot # cat /etc/fstab
28 >> <snip>
29 >> /dev/sda1 /boot ext2 default,noatime 0 2
30 >> /dev/sda2 none swap sw 0 0
31 >> /dev/sda3 / ext4 noatime 0 1
32 >> /dev/sda5 /home ext4 noatime 0 2
33 >> /dev/cdrom /mnt/cdrom auto noauto,ro 0 0
34 >>
35 >>
36 >> box0 boot # mount|grep /dev/sda
37 >> /dev/sda3 on / type ext4 (rw,noatime,data=ordered)
38 >> /dev/sda5 on /home type ext4 (rw,noatime)
39 > ,,,however mount says up there that it's not mounted.
40 >
41 >> box0 boot # fdisk -l /dev/sda
42 >>
43 >> Disk /dev/sda: 250.1 GB, 250059350016 bytes, 488397168 sectors
44 >> Units = sectors of 1 * 512 = 512 bytes
45 >> Sector size (logical/physical): 512 bytes / 512 bytes
46 >> I/O size (minimum/optimal): 512 bytes / 512 bytes
47 >> Disk identifier: 0x00000000
48 >>
49 >> Device Boot Start End Blocks Id System
50 >> /dev/sda1 * 2048 67583 32768 83 Linux
51 >> /dev/sda2 67584 1116159 524288 82 Linux swap / Solaris
52 >> /dev/sda3 1116160 43059199 20971520 83 Linux
53 >> /dev/sda4 43059200 488397167 222668984 5 Extended
54 >> /dev/sda5 43061248 488397167 222667960 83 Linux
55 > For some reason your /boot partition didn't get mounted. See the boot
56 > logs, and try to mounting by hand. Perhaps the fsck failed or it needs
57 > manual intervention.
58 >
59 > Regards.
60 Based on the 'dmesg' output below, EXT2-fs attempted to mount the '/'
61 partition instead of the '/boot' one.
62
63 box0 ~ # dmesg|grep 'EXT.*fs'
64 [ 2.444214] EXT2-fs (sda3): error: couldn't mount because of
65 unsupported optional features (240)
66 [ 2.444736] EXT4-fs (sda3): couldn't mount as ext3 due to feature
67 incompatibilities
68 [ 2.481412] EXT4-fs (sda3): mounted filesystem with ordered data
69 mode. Opts: (null)
70 [ 9.448819] EXT4-fs (sda3): re-mounted. Opts: (null)
71 [ 9.731383] EXT4-fs (sda5): mounted filesystem with ordered data
72 mode. Opts: (null)
73
74 Would that suggest a corrupted /boot/grub/grub.conf file?
75
76 How did the system boot then?
77
78 Thanks.

Replies

Subject Author
Re: [gentoo-user] re: can't find /boot/grub/grub.conf after kernel upgrade [3.10.7] "Canek Peláez Valdés" <caneko@×××××.com>
Re: [gentoo-user] re: can't find /boot/grub/grub.conf after kernel upgrade [3.10.7] Hinnerk van Bruinehsen <h.v.bruinehsen@×××××××××.de>