LVM2 user space, device mapper, Linux 2.4/2.6 dual boot no-go.

LVM2 user space, device mapper, Linux 2.4/2.6 dual boot no-go.

[Matthias Andree]

Ok,

here's the situation:

I want to test drive 2.6, have 2.4.22-pre3-ac1 with LVM1, Device Mapper
and XFS. I tried LVM2 user space on 2.4.22, it complained about ioctl
mismatch (wants 4.x.y, gets 1.m.n). Do I need to disable LVM1?

On 2.6, lvm lvmdiskscan works, but lvm vgscan stuffs my screen with
"modprobe junk.", so I reverted to 2.4-with-LVM1-user-space for now.

Has anyone had success with running the same user-space LVM2 stuff on
2.4 and 2.6? Which versions of device-mapper and LVM2 do you use for
that purpose? What are the magic switches in Linux-2.4.22-preX-acY?

Help appreciated.

-- 
Matthias Andree

Re: LVM2 user space, device mapper, Linux 2.4/2.6 dual boot no-go.

[Joe Thornber]

On Wed, Jul 16, 2003 at 11:53:21AM +0200, Matthias Andree wrote:
> I want to test drive 2.6, have 2.4.22-pre3-ac1 with LVM1, Device Mapper
> and XFS. I tried LVM2 user space on 2.4.22, it complained about ioctl
> mismatch (wants 4.x.y, gets 1.m.n). Do I need to disable LVM1?

The latest tools should work with both v1 and v4 ioctl interfaces,
though there will be an error message when the tools fallback from v4
to v1.

I submitted v4 patches for 2.5 last friday but sadly they haven't been
merged yet.  If you apply these patches you will have to explicitly
enable the v4 interface with 'make config'.

I run the same tools aginst 2.4.21 (v4) 2.5.75 (v1) and 2.5.75 (v4).

- Joe

Re: LVM2 user space, device mapper, Linux 2.4/2.6 dual boot no-go.

[Tupshin Harper]

Matthias Andree wrote:

>Ok,
>
>here's the situation:
>
>I want to test drive 2.6, have 2.4.22-pre3-ac1 with LVM1, Device Mapper
>and XFS. I tried LVM2 user space on 2.4.22, it complained about ioctl
>mismatch (wants 4.x.y, gets 1.m.n). Do I need to disable LVM1?
>
>On 2.6, lvm lvmdiskscan works, but lvm vgscan stuffs my screen with
>"modprobe junk.", so I reverted to 2.4-with-LVM1-user-space for now.
>
>Has anyone had success with running the same user-space LVM2 stuff on
>2.4 and 2.6? Which versions of device-mapper and LVM2 do you use for
>that purpose? What are the magic switches in Linux-2.4.22-preX-acY?
>
>Help appreciated.
>
>  
>
I'm running LVM2 on 2.4.21-ac4, and that works just fine for me (debian 
sid, with the lvm2 package from the distribution). While 2.5/6 is still 
too unstable for me to use for long (for unrelated reasons) , it does 
boot up correctly and function with 25 lvm2 partitions on four different 
lvm groups. I would get it working correctly on your 2.4 kernel first. 
There were not magic incantations for me...what distribution are you 
using, and where are you getting LVM2 from?

-Tupshin