[linux-lvm] LVM2 + Linux 2.6.1 questions

[linux-lvm] LVM2 + Linux 2.6.1 questions

[Dale Gallagher]

Hi there

I've successfully setup LVM2.2.00.08 and
device-mapper.1.00.07 on a Slackware 9.1 host with Linux
2.6.1.  I have a question or two:

1) Would a shutdown error something like the following, be
attributed to LVM and/or device-mapper?

/proc/devices: fopen failed - no such file or directory

2) Why do I see, for example, a /dev/mapper/v01-home entry,
instead of /dev/v01/home, when running 'df' and 'mount'?  I
see that /dev/mapper/v01/home symlinks to
/dev/mapper/v01-home, which must account for this, though I
thought that because I'd specified /dev/v01/home, that it'd
appear as such?  Not that this really matters I suppose ;-)

$ df -h | grep v01
/dev/mapper/v01-home  2.9G  444M  2.4G  16% /home
/dev/mapper/v01-usr   2.0G  1.1G  760M  60% /usr
/dev/mapper/v01-var   985M   30M  906M   4% /var

$ mount | grep v01
/dev/mapper/v01-home on /home type ext3 (rw)
/dev/mapper/v01-usr on /usr type ext3 (rw)
/dev/mapper/v01-var on /var type ext3 (rw)

3) Does anyone know when LVM2 specific docs, such as a
HOWTO and FAQ will be available?

Thanks
Dale

[linux-lvm] Re: LVM2 + Linux 2.6.1 questions

[Måns Rullgård]

"Dale Gallagher" <foobar@mighty.co.za> writes:

> Hi there
>
> I've successfully setup LVM2.2.00.08 and
> device-mapper.1.00.07 on a Slackware 9.1 host with Linux
> 2.6.1.  I have a question or two:
>
> 1) Would a shutdown error something like the following, be
> attributed to LVM and/or device-mapper?
>
> /proc/devices: fopen failed - no such file or directory

It's probably caused by LVM.  I see them too.  Everything works
anyway, so I don't care that much.

> 2) Why do I see, for example, a /dev/mapper/v01-home entry,
> instead of /dev/v01/home, when running 'df' and 'mount'?  I
> see that /dev/mapper/v01/home symlinks to
> /dev/mapper/v01-home, which must account for this, though I
> thought that because I'd specified /dev/v01/home, that it'd
> appear as such?  Not that this really matters I suppose ;-)

I see the /dev/vg/link name.

> $ df -h | grep v01
> /dev/mapper/v01-home  2.9G  444M  2.4G  16% /home
> /dev/mapper/v01-usr   2.0G  1.1G  760M  60% /usr
> /dev/mapper/v01-var   985M   30M  906M   4% /var
>
> $ mount | grep v01
> /dev/mapper/v01-home on /home type ext3 (rw)
> /dev/mapper/v01-usr on /usr type ext3 (rw)
> /dev/mapper/v01-var on /var type ext3 (rw)
>
> 3) Does anyone know when LVM2 specific docs, such as a
> HOWTO and FAQ will be available?

It doesn't seem like you need one, if you've gotten this far.

-- 
Måns Rullgård
mru@kth.se

Re: [linux-lvm] Re: LVM2 + Linux 2.6.1 questions

[Navindra Umanee]

Måns Rullgård <mru@kth.se> wrote:
> > 2) Why do I see, for example, a /dev/mapper/v01-home entry,
> > instead of /dev/v01/home, when running 'df' and 'mount'?  I
> > see that /dev/mapper/v01/home symlinks to
> > /dev/mapper/v01-home, which must account for this, though I
> > thought that because I'd specified /dev/v01/home, that it'd
> > appear as such?  Not that this really matters I suppose ;-)
> 
> I see the /dev/vg/link name.

Mine shows /dev/mapper/vg-link too.  I would definitely prefer
/dev/vg/link because at least it's not implementation dependent... but
I guess it's mostly an aesthetic thing.

Any idea why yours is different?  Different version of mount maybe?
Using mount-2.11z here...

Later,
Navin.

Re: [linux-lvm] Re: LVM2 + Linux 2.6.1 questions

[Dale Gallagher]

 
> Måns Rullgård <mru@kth.se> wrote:
> > I see the /dev/vg/link name.

> Navindra Umanee <navindra@cs.mcgill.ca> wrote:
> Mine shows /dev/mapper/vg-link too.  I would definitely
> prefer
> /dev/vg/link because at least it's not implementation
> dependent... but
> I guess it's mostly an aesthetic thing.
> 
> Any idea why yours is different?  Different version of
> mount maybe?
> Using mount-2.11z here...

I have mount-2.12 and and df (coreutils) 5.0

Dale

[linux-lvm] Re: LVM2 + Linux 2.6.1 questions

[Måns Rullgård]

Navindra Umanee <navindra@cs.mcgill.ca> writes:

> Måns Rullgård <mru@kth.se> wrote:
>> > 2) Why do I see, for example, a /dev/mapper/v01-home entry,
>> > instead of /dev/v01/home, when running 'df' and 'mount'?  I
>> > see that /dev/mapper/v01/home symlinks to
>> > /dev/mapper/v01-home, which must account for this, though I
>> > thought that because I'd specified /dev/v01/home, that it'd
>> > appear as such?  Not that this really matters I suppose ;-)
>> 
>> I see the /dev/vg/link name.
>
> Mine shows /dev/mapper/vg-link too.  I would definitely prefer
> /dev/vg/link because at least it's not implementation dependent... but
> I guess it's mostly an aesthetic thing.
>
> Any idea why yours is different?  Different version of mount maybe?
> Using mount-2.11z here...

Same version here.  It struck me that my /etc/mtab is a symlink to
/proc/mounts.  Maybe that makes a difference.

-- 
Måns Rullgård
mru@kth.se

Re: [linux-lvm] Re: LVM2 + Linux 2.6.1 questions

[Navindra Umanee]

Måns Rullgård <mru@kth.se> wrote:
> Same version here.  It struck me that my /etc/mtab is a symlink to
> /proc/mounts.  Maybe that makes a difference.

That works better, thanks!  I hope it works across boots.  Now it
doesn't have the ugly devfs names instead of the short names either.

There is some anomaly with how the root filesystem is listed though
(it's there twice).  Oh well can't be too picky.

Cheers,
Navin.

Re: [linux-lvm] LVM2 + Linux 2.6.1 questions

[AJ Lewis]

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On Mon, Jan 26, 2004 at 05:04:46PM +0200, Dale Gallagher wrote:
> 3) Does anyone know when LVM2 specific docs, such as a
> HOWTO and FAQ will be available?

I'm currently working on updating the LVM Howto at the Linux Documentation
Project to include LVM2 information, so if you have anything you want to in
there, let me know.

Thanks,
-- 
AJ Lewis                                   Voice:  612-638-0500
Red Hat Inc.                               E-Mail: alewis@redhat.com
720 Washington Ave. SE, Suite 200
Minneapolis, MN 55414

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Grab the key at: http://people.redhat.com/alewis/gpg.html or one of the
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