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Re: FSCK Maintenance - no root password



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 gmail com> wrote:

Ok, didn't think about that sorry.

On Mon, Oct 13, 2008 at 11:01 AM, Chet Nichols III
<chet nichols 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 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 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 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 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 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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