Re: [gentoo-user] re: can't find /boot/grub/grub.conf after kernel upgrade [3.10.7]

[Alexander Kapshuk <alexander.kapshuk@gmail.com>]

On 09/07/2013 09:35 PM, Canek Peláez Valdés wrote:
> On Sat, Sep 7, 2013 at 1:24 PM, Alexander Kapshuk
> <alexander.kapshuk@gmail.com> wrote:
>> On 09/07/2013 09:11 PM, Canek Peláez Valdés wrote:
>>> On Sat, Sep 7, 2013 at 1:06 PM, Alexander Kapshuk
>>> <alexander.kapshuk@gmail.com> wrote:
>>>> Howdy,
>>>>
>>>> Just compiled the new kernel [3.10.7], was about to edit my
>>>> /boot/grub/grub.conf, and found it missing:
>>>> box0 boot # pwd
>>>> /boot
>>>> box0 boot # ls -a
>>>> .  ..  kernel-3.10.7-gentoo  kernel-3.8.13-gentoo
>>>>
>>>> What did I miss?
>>> Do you have /boot in a separated partition? Did you mounted it?
>>>
>>> Nothing should touch /boot, AFAIK.
>>>
>>> Regards.
>> I do have '/boot' on a separate partition. If I understand it correctly,
>> '/boot' gets mounted every time at system start-up, based on
>> '/etc/fstab', does it not?
> By the contents of your fstab, it should...
>
>> box0 boot # cat /etc/fstab
>> <snip>
>> /dev/sda1        /boot        ext2        default,noatime    0 2
>> /dev/sda2        none        swap        sw        0 0
>> /dev/sda3        /        ext4        noatime        0 1
>> /dev/sda5        /home        ext4        noatime            0 2
>> /dev/cdrom        /mnt/cdrom    auto        noauto,ro    0 0
>>
>>
>> box0 boot # mount|grep /dev/sda
>> /dev/sda3 on / type ext4 (rw,noatime,data=ordered)
>> /dev/sda5 on /home type ext4 (rw,noatime)
> ,,,however mount says up there that it's not mounted.
>
>> box0 boot # fdisk -l /dev/sda
>>
>> Disk /dev/sda: 250.1 GB, 250059350016 bytes, 488397168 sectors
>> Units = sectors of 1 * 512 = 512 bytes
>> Sector size (logical/physical): 512 bytes / 512 bytes
>> I/O size (minimum/optimal): 512 bytes / 512 bytes
>> Disk identifier: 0x00000000
>>
>>    Device Boot      Start         End      Blocks   Id  System
>> /dev/sda1   *        2048       67583       32768   83  Linux
>> /dev/sda2           67584     1116159      524288   82  Linux swap / Solaris
>> /dev/sda3         1116160    43059199    20971520   83  Linux
>> /dev/sda4        43059200   488397167   222668984    5  Extended
>> /dev/sda5        43061248   488397167   222667960   83  Linux
> For some reason your /boot partition didn't get mounted. See the boot
> logs, and try to mounting by hand. Perhaps the fsck failed or it needs
> manual intervention.
>
> Regards.
Based on the 'dmesg' output below, EXT2-fs attempted to mount the '/'
partition instead of the '/boot' one.

box0 ~ # dmesg|grep 'EXT.*fs'
[    2.444214] EXT2-fs (sda3): error: couldn't mount because of
unsupported optional features (240)
[    2.444736] EXT4-fs (sda3): couldn't mount as ext3 due to feature
incompatibilities
[    2.481412] EXT4-fs (sda3): mounted filesystem with ordered data
mode. Opts: (null)
[    9.448819] EXT4-fs (sda3): re-mounted. Opts: (null)
[    9.731383] EXT4-fs (sda5): mounted filesystem with ordered data
mode. Opts: (null)

Would that suggest a corrupted /boot/grub/grub.conf file?

How did the system boot then?

Thanks.