[linux-lvm] lvm liveCD help needed

[linux-lvm] lvm liveCD help needed

[Paul Pianta]

Hi people

I have a little problem that I was hoping someone might be able to help
me with.

I 'text mode' installed a FC1 installation and was unable to configure
the volume groups or logical volumes (limitation of text mode :( ...). I
thought "that's ok - I will just create them later!" - and this is where
my problem began :)

I configured the 2 x 200G ide drives with software raid as follows:
/dev/md0 - /boot - 100M
/dev/md1 - /     - 10G
/dev/md2 - swap
/dev/md3 - one big physical volume (lvm) ~185G

The system is installed and I assume that it all went onto /dev/md1.
What I wanted to do was to put /usr, /var, and /home in logical volumes
in one large volume group as such:

/vgRoot/lvUsr - 10G
/vgRoot/lvHome - 20G
/vgRoot/lvVar - 120G
with 30G free for playing around with later

Now ...

I have a gentoo live cd (with lvm support) and I assume this is what I
need to use to 
1. create the volume group vgRoot
2. create the three logical volumes lvUsr, lvHome, lvVar
3. copy /usr, /home, /var from /dev/md1 over to these newly created
logical volumes
4. edit /etc/fstab to reflect the new partition layout
5. reboot and dance around the room with my pants down singing 'oh what
a beautiful morning'


My problem is I don't know how to access the lvm support on the gentoo
live cd and even worse than that - I don't know how to get at my /
partition with the live cd because it is a software raid partition and I
don't know how to go about mounting it.

Any ideas would be much appreciated - and I will promise not to drop my
pants whilst singing if we can get this figured out :)

thanks

pantz

Re: [linux-lvm] lvm liveCD help needed

[Fred Donck]

Paul Pianta <pantz@lqt.ca>
   wrote at Wed, Feb 23, 2005 at 04:43:41PM -0500:

> Hi people
> 
> I have a gentoo live cd (with lvm support) and I assume this is what I
> need to use to 
> 1. create the volume group vgRoot
> 2. create the three logical volumes lvUsr, lvHome, lvVar
> 3. copy /usr, /home, /var from /dev/md1 over to these newly created
> logical volumes
> 4. edit /etc/fstab to reflect the new partition layout
> 5. reboot and dance around the room with my pants down singing 'oh what
> a beautiful morning'
> 
Paul,

The url below is what i used and it runs perfectly.
http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Software_RAID_mirror_and_LVM2_on_top_of_RAID

I have a 4x250Gb machine with disk 0 and 3 as raid pair. My fstab looks
like this:

/dev/md0         /boot           ext3            noauto,noatime 1 1
/dev/md2         /               reiserfs        noatime 0 0
/dev/md1         none            swap            sw 0 0
/dev/vg/usr      /usr            reiserfs        noatime 0 0
/dev/vg/var      /var            reiserfs        noatime 0 0
/dev/vg/tmp      /tmp            reiserfs        noatime 0 0
/dev/vg/opt      /opt            reiserfs        noatime 0 0
/dev/vg/home     /home           reiserfs        noatime 0 0

have a look at the URL 

> thanks
> 
> pantz
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

--- End of pantz@lqt.ca's quote ---

cheers,
-- 
Fred	

Buzzwords are like annoying little flies that deserve to be swatted

Re: [linux-lvm] lvm liveCD help needed

[Fred Donck]

Fred Donck <fred@donck.com>
   wrote at Thu, Feb 24, 2005 at 09:35:03AM +0100:

> 
> Paul,
> 
> The url below is what i used and it runs perfectly.
> http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Software_RAID_mirror_and_LVM2_on_top_of_RAID
> 
> I have a 4x250Gb machine with disk 0 and 3 as raid pair. My fstab looks
> like this:
> 
> /dev/md0         /boot           ext3            noauto,noatime 1 1
> /dev/md2         /               reiserfs        noatime 0 0
> /dev/md1         none            swap            sw 0 0
> /dev/vg/usr      /usr            reiserfs        noatime 0 0
> /dev/vg/var      /var            reiserfs        noatime 0 0
> /dev/vg/tmp      /tmp            reiserfs        noatime 0 0
> /dev/vg/opt      /opt            reiserfs        noatime 0 0
> /dev/vg/home     /home           reiserfs        noatime 0 0
> 
> have a look at the URL 

forgot to mentions few things:

o) make sure you have latest available version of lvm2 from gentoo using
   ACCEPT_KEYWORDS="~x86" emerge lvm2

o) in my case the volumegroup 'vg' is on /dev/md3

> 
> 
> cheers,
> -- 
> Fred	
> 
> Buzzwords are like annoying little flies that deserve to be swatted
> 

--- End of fred@donck.com's quote ---

-- 
Fred

Objects in a mirror are closer than you think!

Re: [linux-lvm] lvm liveCD help needed

[Paul Pianta]

On Thu, 2005-02-24 at 10:39 +0100, Fred Donck wrote:

> forgot to mentions few things:
> 
> o) make sure you have latest available version of lvm2 from gentoo using
>    ACCEPT_KEYWORDS="~x86" emerge lvm2

Thanks for the pointer to the how-to Fred. I am trying the above command
once booted into the live cd but it is telling me that it can't find
'emerge'.

Is there something that I need to do to enable emerge capability on the
live cd before being able to use it?

#ls -l /usr/bin/emerge
/usr/bin/emerge -> ../lib/portage/bin/emerge

but when I list /usr/lib/portage there is nothing there!

Sorry I am a bit of a gentoob ... any ideas how to get emerge working on
the live cd?

pantz

Re: [linux-lvm] lvm liveCD help needed

[Paul Pianta]

On Thu, 2005-02-24 at 09:43 -0500, Paul Pianta wrote:
> On Thu, 2005-02-24 at 10:39 +0100, Fred Donck wrote:
> 
> > forgot to mentions few things:
> > 
> > o) make sure you have latest available version of lvm2 from gentoo using
> >    ACCEPT_KEYWORDS="~x86" emerge lvm2
> 
> Thanks for the pointer to the how-to Fred. I am trying the above command
> once booted into the live cd but it is telling me that it can't find
> 'emerge'.
> 
> Is there something that I need to do to enable emerge capability on the
> live cd before being able to use it?
> 
> #ls -l /usr/bin/emerge
> /usr/bin/emerge -> ../lib/portage/bin/emerge
> 
> but when I list /usr/lib/portage there is nothing there!
> 
> Sorry I am a bit of a gentoob ... any ideas how to get emerge working on
> the live cd?

Don't worry about it - I used the version of lvm that comes on the
2004.3 livecd and all went well - only to discover that FC1 doesn't
support lvm2 so when I booted back into FC1 it didn't recognise my lvm
partitions and so didn't boot any further ...

Not to worry - I just learnt lots about software raid and lvm2 from the
gentoo how-to! 

thanks again

pantz

RE: [linux-lvm] lvm liveCD help needed

[Bao, Liping]

 
Hi Paul

Several things:
1.several method to mount your root
	a)using "raidautorun" to detect the MDs.
	b)using "raidstart -a -c $RAIDTAB",
	 here you may can not get the raidtab file, you need to compile
one manually. 
	Alternatilvey, "mount /dev/hda3 /mnt/disks", (because the / is
md1, and I assume that /dev/hda3 is one of the partition in the md1).

2./boot can be installed on md0?


Message: 4
Date: Wed, 23 Feb 2005 16:43:41 -0500
From: Paul Pianta <pantz@lqt.ca>
Subject: [linux-lvm] lvm liveCD help needed
To: linux-lvm@redhat.com
Message-ID: <1109195021.4695.65.camel@aragorn.intranet>
Content-Type: text/plain

Hi people

I have a little problem that I was hoping someone might be able to help
me with.

I 'text mode' installed a FC1 installation and was unable to configure
the volume groups or logical volumes (limitation of text mode :( ...). I
thought "that's ok - I will just create them later!" - and this is where
my problem began :)

I configured the 2 x 200G ide drives with software raid as follows:
/dev/md0 - /boot - 100M
/dev/md1 - /     - 10G
/dev/md2 - swap
/dev/md3 - one big physical volume (lvm) ~185G

The system is installed and I assume that it all went onto /dev/md1.
What I wanted to do was to put /usr, /var, and /home in logical volumes
in one large volume group as such:

/vgRoot/lvUsr - 10G
/vgRoot/lvHome - 20G
/vgRoot/lvVar - 120G
with 30G free for playing around with later

Now ...

I have a gentoo live cd (with lvm support) and I assume this is what I
need to use to 
1. create the volume group vgRoot
2. create the three logical volumes lvUsr, lvHome, lvVar
3. copy /usr, /home, /var from /dev/md1 over to these newly created
logical volumes
4. edit /etc/fstab to reflect the new partition layout
5. reboot and dance around the room with my pants down singing 'oh what
a beautiful morning'


My problem is I don't know how to access the lvm support on the gentoo
live cd and even worse than that - I don't know how to get at my /
partition with the live cd because it is a software raid partition and I
don't know how to go about mounting it.

Any ideas would be much appreciated - and I will promise not to drop my
pants whilst singing if we can get this figured out :)

thanks

pantz