FSCK Maintenance - no root password

[Andrey Meganov]

Raid and lvm devices dont needspecific services to run, just the  
device mapper drivers, which are loaded in the maintenance mode.

BR,
Andrey

Sent from my iPhone as I am away from office


On 13.10.2008, at 18:40, "Jason Brown" <ninjazjb at gmail.com> wrote:

> Ok, didn't think about that sorry.
>
> On Mon, Oct 13, 2008 at 11:01 AM, Chet Nichols III
> <chet.nichols at gmail.com>wrote:
>
>> I know services dont run in maintenance mode, and that's why I'm  
>> asking. My
>> thought was, without the md driver loaded, the OS isn't going to be  
>> able to
>> understand how to work with /dev/md0, so you may need to load the  
>> driver
>> first before fsck will be able to read the device.
>>
>> On Mon, Oct 13, 2008 at 10:46 AM, Jason Brown <ninjazjb at gmail.com>  
>> wrote:
>>
>>> I believe its LVM over RAID, but I will have to look and get back  
>>> with
>> you.
>>> When I created the RAID array, I assigned all the disks the  
>>> software RAID
>>> and then created the RAID 5 during the installation.  I did not go
>> through
>>> and split the partitions afterwards.
>>>
>>> When I run fsck I get this error...
>>>
>>> fsck.ext3: Invalid argument while trying to open /dev/md0
>>> /dev/md0:
>>> The superblock could not be read or does not describe a correct ext2
>>> filesystem. If the device is valid and it really contains an ext2
>>> filesystem (and not swap or ufs or something else), then the  
>>> superblock
>>> is corrupt, and you might try running e2fsck with an alternative
>>> superblock:
>>>   e2fsck -b 8193 <device>
>>>
>>> I then try e2fsck -b 8193 /dev/md0 and get the same error message.
>>>
>>>
>>>
>>> On Mon, Oct 13, 2008 at 10:38 AM, Jason Brown <ninjazjb at gmail.com>
>> wrote:
>>>
>>>>
>>>>> I don't use software RAID, but I would probably want to do this in
>>> rescue
>>>> mode off of disc 1.  What RAID level are you using?
>>>> 5.
>>>>
>>>>
>>>>> I know this is a silly question, but is the md driver loaded and  
>>>>> are
>> the
>>>> md
>>>> services running?
>>>>
>>>> Services are not loaded when in maintenance mode.  The server  
>>>> does not
>>> even
>>>> mount the file systems because you cannot run FSCK on a mounted  
>>>> device.
>>>>
>>>>
>>>>
>>>> On Mon, Oct 13, 2008 at 9:39 AM, Chet Nichols III <
>>> chet.nichols at gmail.com>wrote:
>>>>
>>>>> I know this is a silly question, but is the md driver loaded and  
>>>>> are
>> the
>>>>> md
>>>>> services running?
>>>>> Chet
>>>>>
>>>>> On Mon, Oct 13, 2008 at 9:15 AM, Barry Brimer <lists at brimer.org>
>> wrote:
>>>>>
>>>>>> I don't use software RAID, but I would probably want to do this  
>>>>>> in
>>>>> rescue
>>>>>> mode off of disc 1.  What RAID level are you using?
>>>>>>
>>>>>>
>>>>>> On Mon, 13 Oct 2008, Jason Brown wrote:
>>>>>>
>>>>>> When I tried booting it into single user mode the server would
>> still
>>> go
>>>>> to
>>>>>>> maintenance mode.  I was able to get at it another way by   
>>>>>>> passing
>>>>>>> "init=/bin/bash" which got me to a command prompt.  Then  
>>>>>>> remounted
>>> the
>>>>>>> drive
>>>>>>> with rw since it was in ro mode, and then changed the password.
>> Now
>>> I
>>>>>>> have
>>>>>>> it in maintenance mode again, I just need to figure out how to  
>>>>>>> do
>> an
>>>>> fsck
>>>>>>> on
>>>>>>> a raid system.  When I try fsck /dev/md0 I got a bad super block
>>> error
>>>>> and
>>>>>>> to run e2fsck -b 8192 which gives me the same error message.
>>>>>>> Any ideas would be appreciated.
>>>>>>> Thanks.
>>>>>>>
>>>>>>> On Sun, Oct 12, 2008 at 10:57 PM, Barry Brimer  
>>>>>>> <lists at brimer.org>
>>>>> wrote:
>>>>>>>
>>>>>>> My file server locked up and I had to reboot it, when it came up
>> its
>>>>>>>> stuck
>>>>>>>>
>>>>>>>>> in the FSCK maintenance.  Is there a way that I can run this
>>> without
>>>>> a
>>>>>>>>> root
>>>>>>>>> password or reset the password?  The file system is an ext3  
>>>>>>>>> in a
>>> raid
>>>>> 5
>>>>>>>>> configuration.
>>>>>>>>>
>>>>>>>>>
>>>>>>>> I would be very cautious about interrupting an fsck.  If you
>> reboot
>>>>> your
>>>>>>>> machine and press a key to bring up the grub menu, then type  
>>>>>>>> 'e'
>> to
>>>>> edit
>>>>>>>> that kernel entry, move to the kernel line, hit 'a' to  
>>>>>>>> append ..
>>> place
>>>>> an
>>>>>>>> 's' at the end of the line and hit enter and then 'b' to boot  
>>>>>>>> you
>>> will
>>>>>>>> boot
>>>>>>>> without the root password into single user mode.
>>>>>>>>
>>>>>>>> Barry
>>>>>>>>
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>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> ----------------------------------------
>>>>> chet nichols III
>>>>> chet.nichols at gmail.com
>>>>> aim: chet / twitter: chet
>>>>> http://chetnichols.org
>>>>> ----------------------------------------
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>>
>>
>>
>> --
>> ----------------------------------------
>> chet nichols III
>> chet.nichols at gmail.com
>> aim: chet / twitter: chet
>> http://chetnichols.org
>> ----------------------------------------
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