[gentoo-user] How do I get LVM2 off a drive?

[gentoo-user] How do I get LVM2 off a drive?

[Mark Knecht]

I did an experiment with LVM2 to see how it worked, but I put it
inside of partition 3. I then wanted to remove it and put it in
partition 4 instead. (More like Neil's setup.) However, the system
keeps finding the old vg1 volume group. I went so far as to remove all
partitions, put on a new partition, make a new file system, then
remove that filesystem and do my final ones with LVM2 in partition 4
but the system still finds the old vg1 volume group and complains that
sda3 is too small.

I guess this is in the partition table? If so how do I completely
remove the LVM2 data and set the table back to default?

Thanks in advance,
Mark

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[gentoo-user] Re: How do I get LVM2 off a drive?

[Mark Knecht]

Answering self:

1) fdisk didn't seem to work
2) cfdisk did

- Mark

On 8/30/05, Mark Knecht <markknecht@gmail.com> wrote:
> I did an experiment with LVM2 to see how it worked, but I put it
> inside of partition 3. I then wanted to remove it and put it in
> partition 4 instead. (More like Neil's setup.) However, the system
> keeps finding the old vg1 volume group. I went so far as to remove all
> partitions, put on a new partition, make a new file system, then
> remove that filesystem and do my final ones with LVM2 in partition 4
> but the system still finds the old vg1 volume group and complains that
> sda3 is too small.
> 
> I guess this is in the partition table? If so how do I completely
> remove the LVM2 data and set the table back to default?
> 
> Thanks in advance,
> Mark
>

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Re: [gentoo-user] Re: How do I get LVM2 off a drive?

[Alvin A ONeal Jr]

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I don't think LVM2 cares about partitions. AFAIK you only use fdisk 
(marking partitions as 8e? for lvm2) to be polite to other OSes that 
don't auto-detect like Linux does.

I'm not exactly sure what's happening to you, but try this:
vgchange -a y; vgchange -a n
vgchange -a y; vgchange -a n
emerge -C lvm2; rm /etc/lvm/ -rf; emerge lvm2
vgchange -a y; vgchange -a n
vgchange -a y; vgchange -a n

I don't know what it does, but I got frustrated one time when copying an 
imaged machine (the old partitions didn't match on the new machine) and 
I think that was how I fixed it.
-- 
8^)
Laterz-
~Alvin
http://CoolAJ86.Havenite.net

---
Wow! You should get a gold star sticker!

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Re: [gentoo-user] How do I get LVM2 off a drive?

[Petteri Räty]

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Mark Knecht wrote:
> I did an experiment with LVM2 to see how it worked, but I put it
> inside of partition 3. I then wanted to remove it and put it in
> partition 4 instead. (More like Neil's setup.) However, the system
> keeps finding the old vg1 volume group. I went so far as to remove all
> partitions, put on a new partition, make a new file system, then
> remove that filesystem and do my final ones with LVM2 in partition 4
> but the system still finds the old vg1 volume group and complains that
> sda3 is too small.

The easiest thing to move lvm partitions from one physical partition to
another is as follows:
1. pvcreate <new> (create lvm2 data on the partition)
2. vgextend <vg> <new> (adds the new partition to the volume group)
3. pvmove <old> (moves the extends to the new partitions)
4. vgreduce <old> (removes the old partition from the volume group)
5. pvremove <old> (wipes the lvm2 markings from the partition)

> 
> I guess this is in the partition table? If so how do I completely
> remove the LVM2 data and set the table back to default?

Hopefully this was what you were looking to do.

> 
> Thanks in advance,
> Mark
> 

Regards,
Petteri Räty
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