Re: [linux-lvm] Installed the lvm on the Red Hat 7.1 then what to do

Re: [linux-lvm] Installed the lvm on the Red Hat 7.1 then what to do

[Erik Bågfors]

On 28 Jun 2001 18:39:43 +0530, RAGHVENDRA SHUKLA wrote:
> 
> Hello, 
>        Thanks austin for the tech. help you have provided ,
>        But still i am not clear about the difference between
>        the already created partitions ( which are created during the
>        Installation of linux ) and those created by the lvm , 
>        also can i increase only those partitions which are created 
>        by the Lvm ?? Please Reply and help .
> 
with normal partitioning you have
* disks
* partitions (on those disks)
* filesystems (on those partitions)

example

    hda            (disk)
     |
     /\
 hda1  hda2        (partitions)
  |      |
 ext2  reiserfs    (filesystems)


with (linux-)lvm you have 

* physical disks (PV) (on a partition or on a whole disk)
* volume groups (VG) (consists of one of more PV:s, think of them as virtual disks)
* Logival volumes (LV) (on those VG:s.  think of them as virtual partitions)

So..

    hda1   hdc1      (PV:s on partitions or whole disks)
       \   /
        \ /
       diskvg        (VG)
       /  |  \
      /   |   \
  usrlv rootlv varlv (resizeable LV:s, think of them as resizeable virtual partitions)
    |      |     |
 ext2  reiserfs  xfs (filesystems)

So you need to 
1) create a pv
2) create a vg on that pv
3) create lv:s on that vg
4) create a filesystem on those lv:s
5) mount the lv:s


Hope that helps

/Erik
-- 
Erik B�gfors               | http://erik.bagfors.nu/    
erik@bagfors.nu            | Erik.Bagfors@ardendo.se
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[linux-lvm] LVM on Redhat 2.4.3-12 Kernel

[gerry]

I never could get LVM working on the 2.2.19 Redhat kernel.  I had to
download the generic 2.2.19 kernel from kernel.org and then patch it.
Those same patches didn't work on RH's kernel.

I have now upgraded from RH 7.0 to 7.1 and compiled LVM statically in the
2.4.3-12 kernel that came with RH 7.1.  When I boot using this kernel LVM
doesn't work.  It still works if I go back to the 2.2.19 kernel.

My questions....
1. will LVM actually work with RH's 2.4.3-12 kernel?
2. does this kernel have to be patched?
3. do I just need updated LVM software?

In other words, how do I get this going under the new kernel???

Thanks!  Gerry

-- 
"The lyf so short, the craft so long to learne."   Geoffrey Chaucer

Re: [linux-lvm] LVM on Redhat 2.4.3-12 Kernel

[Ben Lutgens]

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On Tue, Jul 03, 2001 at 05:13:57PM -0400, gerry@dorfam.ca wrote:
>
>In other words, how do I get this going under the new kernel???

We always recommend downloading kernel source from kernel.org, get a copy
of the latest released source from ftp.sistina.com and follow the steps
in the howto. 

RedHat applies tons of custom patches ( 200+ ) to the vanilla source tree in an
attempt to one-up thier competition. While this is not inherintly bad, it
can make things difficult to sort out when you start trying to apply
patches that were generated based off of stock linus brand kernels. Also
there may be some hidden differences which let you think everything is
working while it in fact is not.


-- 
Ben Lutgens		
Sistina Software Inc.	
Kernel panic: I have no root and I want to scream

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Re: [linux-lvm] LVM on Redhat 2.4.3-12 Kernel

[Joe Thornber]

On Tue, Jul 03, 2001 at 05:13:57PM -0400, gerry@dorfam.ca wrote:
> I never could get LVM working on the 2.2.19 Redhat kernel.  I had to
> download the generic 2.2.19 kernel from kernel.org and then patch it.
> Those same patches didn't work on RH's kernel.
> 
> I have now upgraded from RH 7.0 to 7.1 and compiled LVM statically in the
> 2.4.3-12 kernel that came with RH 7.1.  When I boot using this kernel LVM
> doesn't work.  It still works if I go back to the 2.2.19 kernel.

All the major distributions have their own versions of the kernel.  We
do not develop or test against these.  So there are no guarantees that
LVM will work out of the box with anything other than Linus' kernels.
Some distributions, notably SuSE, work at making sure that LVM
integrates with their kernel.

> 
> My questions....
> 1. will LVM actually work with RH's 2.4.3-12 kernel?

I don't know, perhaps we need a volunteer to deal with RedHat issues.

> 2. does this kernel have to be patched?

Yes.

> 3. do I just need updated LVM software?

Please use the latest tools.

> In other words, how do I get this going under the new kernel???

Personally I would just use a vanilla kernel.

- Joe

Re: [linux-lvm] LVM on Redhat 2.4.3-12 Kernel

[Carlo Marcelo Arenas Belon]

<SNIP>
> > I have now upgraded from RH 7.0 to 7.1 and compiled LVM statically in the
> > 2.4.3-12 kernel that came with RH 7.1.  When I boot using this kernel LVM
> > doesn't work.  It still works if I go back to the 2.2.19 kernel.

weird, i have RH7.1 with a RH7.1beta kernel and running lvm0.9.1_beta6
without problems.

surelly the lvm patch could fit better on a linus kernel, but IMHO
RedHat's kernels are easy to patch and rebuild from the package.

and once you have a package it is far easier to duplicate the installation
on several machines that doing tar/patch/make.

actually i've been waiting for lvm 1.0.0 to make a new rpm to replace my
old kernel with a new 2.4.3-12 based one (no need to hurry so far)

if someone is interested i will post the tested packages when ready (BTW
anyone knows what happened to the 1.0 release that was supposed to be
yesterday?)

regards,

Carlo

Re: [linux-lvm] LVM on Redhat 2.4.3-12 Kernel

[Joe Thornber]

On Wed, Jul 04, 2001 at 04:50:53PM -0500, Carlo Marcelo Arenas Belon wrote:
> <SNIP>
> (BTW anyone knows what happened to the 1.0 release that was supposed to be
> yesterday?)

The release is delayed :( I think we're going to need another beta
release before the great 1.0.  We want to be careful that we can still
support existing systems with the bad alignments, as well as newly
created LV's that have correct alignment.  This is going to involve an
upgrade tool that will be run on existing VG's before the new software
(beta8) can be used.

- Joe

Re: [linux-lvm] LVM on Redhat 2.4.3-12 Kernel

[Ed Tomlinson]

On July 5, 2001 05:39 am, Joe Thornber wrote:
> On Wed, Jul 04, 2001 at 04:50:53PM -0500, Carlo Marcelo Arenas Belon wrote:
> > <SNIP>
> > (BTW anyone knows what happened to the 1.0 release that was supposed to
> > be yesterday?)
>
> The release is delayed :( I think we're going to need another beta
> release before the great 1.0.  We want to be careful that we can still
> support existing systems with the bad alignments, as well as newly
> created LV's that have correct alignment.  This is going to involve an
> upgrade tool that will be run on existing VG's before the new software
> (beta8) can be used.

Think creating this tool is a very good idea.  Suggest that you use beta8
in a very dirrected way - possibly publicly stating that the beta8 release
is to test X, Y and Z and will last N weeks/days (if no serious problems are
found).  Alternatly you could use rc1 instead of beta8 and work from there.

Thanks
Ed Tomlinson

Re: [linux-lvm] Installed the lvm on the Red Hat 7.1 then what to do

[AJ Lewis]

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n Sun, Jul 01, 2001 at 09:25:38PM +0200, Erik Bågfors wrote:
>     hda1   hdc1      (PV:s on partitions or whole disks)
>        \   /
>         \ /
>        diskvg        (VG)
>        /  |  \
>       /   |   \
>   usrlv rootlv varlv (resizeable LV:s, think of them as resizeable virtual partitions)
>     |      |     |
>  ext2  reiserfs  xfs (filesystems)

I hope you don't mind, but I've stuck this diagram in the LVM howto.  Is
that ok, or should i pull it out?

-- 
AJ Lewis
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1313 5th St SE, Suite 111              Fax:    612-638-0500
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http://www.sistina.com

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