[linux-lvm] devfs...

[linux-lvm] devfs...

[James Pattinson]

Hi

I'm sure this is a FAQ but I can't find the answer anywhere.

I've am using LVM 0.8i on 2.2.14 with the latest devfs patch. My root
filesystem in on an LV and I have an initrd that does a vgscan and a
vgchange. However now I'm using devfs, vgscan dooesn't find any of my
volume groups - maybe because vgscan doesn't know to look in /dev/scsi or
whatever. Is there a patch to fix this?

Cheers!

James

Re: [linux-lvm] devfs...

[Heinz Mauelshagen]

> Hi
> 
> I'm sure this is a FAQ but I can't find the answer anywhere.
> 
> I've am using LVM 0.8i on 2.2.14 with the latest devfs patch.

Sorry, this combination is not yet supported.
I still have to focus on devfs support 8*(

> My root
> filesystem in on an LV and I have an initrd that does a vgscan and a
> vgchange. However now I'm using devfs, vgscan dooesn't find any of my
> volume groups - maybe because vgscan doesn't know to look in /dev/scsi or
> whatever. Is there a patch to fix this?

vgscan (respectively the library routines involved) already
take care of devfs naming conventions.

Did you mount devfs in linuxrc before running vgscan?

Regards,
Heinz

-- 

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Systemmanagement CS-TS                           T-Nova
                                                 Entwicklungszentrum Darmstadt
Heinz Mauelshagen                                Otto-Roehm-Strasse 71c
Senior Systems Engineer                          Postfach 10 05 41
                                                 64205 Darmstadt
mge@EZ-Darmstadt.Telekom.de                      Germany
                                                 +49 6151 886-425
                                                          FAX-386
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Re: [linux-lvm] devfs...

[James Pattinson]

Well I have things working now - my linuxrc actually creates (mknod)
/dev/sd[a-d] with the correct device numbers. Then the vgscan works and
real root is mounted. This is all working fine. So I'm now not sure why it
wasn't working before, if LVM really does know about the devfs naming
conventions. I did an strace on vgscan and it didn't look at /dev/scsi or
/dev/discs or anything like that.

Cheers

James

On Wed, 5 Jan 2000, Heinz Mauelshagen wrote:

> > Hi
> > 
> > I'm sure this is a FAQ but I can't find the answer anywhere.
> > 
> > I've am using LVM 0.8i on 2.2.14 with the latest devfs patch.
> 
> Sorry, this combination is not yet supported.
> I still have to focus on devfs support 8*(
> 
> > My root
> > filesystem in on an LV and I have an initrd that does a vgscan and a
> > vgchange. However now I'm using devfs, vgscan dooesn't find any of my
> > volume groups - maybe because vgscan doesn't know to look in /dev/scsi or
> > whatever. Is there a patch to fix this?
> 
> vgscan (respectively the library routines involved) already
> take care of devfs naming conventions.
> 
> Did you mount devfs in linuxrc before running vgscan?
> 
> Regards,
> Heinz
> 
> -- 
> 
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> 
> Systemmanagement CS-TS                           T-Nova
>                                                  Entwicklungszentrum Darmstadt
> Heinz Mauelshagen                                Otto-Roehm-Strasse 71c
> Senior Systems Engineer                          Postfach 10 05 41
>                                                  64205 Darmstadt
> mge@EZ-Darmstadt.Telekom.de                      Germany
>                                                  +49 6151 886-425
>                                                           FAX-386
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> 

Re: [linux-lvm] devfs...

[James Pattinson]

OK I've been looking around - and it seems that the latest devfs doesn't
have /dev/sd/*  - instead we have lots of weird things, like
/dev/discs/disc0/* /dev/discs/disc1/* etc ... I've fixed my vgscan but
adding

   static char *devdir[] = {
      "/dev/ida",
      "/dev/ide/hd",
      "/dev/loop",
      "/dev/md",
      "/dev/rd",
      "/dev/sd",
+     "/dev/discs/disc0",
+     "/dev/discs/disc1",
+     "/dev/discs/disc2",
+     "/dev/discs/disc3",
+     "/dev/discs/disc4",
      "/dev",
      NULL

to lvm_dir_cache.c and similar to pv_check_name.c.

It works for me but hopefully devfs will settle down and not keep changing
soon...

Thanks,

james

On Wed, 5 Jan 2000, Heinz Mauelshagen wrote:

> > Hi
> > 
> > I'm sure this is a FAQ but I can't find the answer anywhere.
> > 
> > I've am using LVM 0.8i on 2.2.14 with the latest devfs patch.
> 
> Sorry, this combination is not yet supported.
> I still have to focus on devfs support 8*(
> 
> > My root
> > filesystem in on an LV and I have an initrd that does a vgscan and a
> > vgchange. However now I'm using devfs, vgscan dooesn't find any of my
> > volume groups - maybe because vgscan doesn't know to look in /dev/scsi or
> > whatever. Is there a patch to fix this?
> 
> vgscan (respectively the library routines involved) already
> take care of devfs naming conventions.
> 
> Did you mount devfs in linuxrc before running vgscan?
> 
> Regards,
> Heinz
> 
> -- 
> 
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> 
> Systemmanagement CS-TS                           T-Nova
>                                                  Entwicklungszentrum Darmstadt
> Heinz Mauelshagen                                Otto-Roehm-Strasse 71c
> Senior Systems Engineer                          Postfach 10 05 41
>                                                  64205 Darmstadt
> mge@EZ-Darmstadt.Telekom.de                      Germany
>                                                  +49 6151 886-425
>                                                           FAX-386
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> 

Re: [linux-lvm] devfs...

[Jos Visser]

Hi,

Maybe I'm a bit silly, but can't vgscan recusively descend into the /dev
directory and try to followup on all block devices it sees there with
exception to the obvious to-be-left-outs?

++Jos

James Pattinson wrote:
> 
> OK I've been looking around - and it seems that the latest devfs doesn't
> have /dev/sd/*  - instead we have lots of weird things, like
> /dev/discs/disc0/* /dev/discs/disc1/* etc ... I've fixed my vgscan but
> adding
> 
>    static char *devdir[] = {
>       "/dev/ida",
>       "/dev/ide/hd",
>       "/dev/loop",
>       "/dev/md",
>       "/dev/rd",
>       "/dev/sd",
> +     "/dev/discs/disc0",
> +     "/dev/discs/disc1",
> +     "/dev/discs/disc2",
> +     "/dev/discs/disc3",
> +     "/dev/discs/disc4",
>       "/dev",
>       NULL
> 
> to lvm_dir_cache.c and similar to pv_check_name.c.
> 
> It works for me but hopefully devfs will settle down and not keep changing
> soon...
> 
> Thanks,
> 
> james
> 
> On Wed, 5 Jan 2000, Heinz Mauelshagen wrote:
> 
> > > Hi
> > >
> > > I'm sure this is a FAQ but I can't find the answer anywhere.
> > >
> > > I've am using LVM 0.8i on 2.2.14 with the latest devfs patch.
> >
> > Sorry, this combination is not yet supported.
> > I still have to focus on devfs support 8*(
> >
> > > My root
> > > filesystem in on an LV and I have an initrd that does a vgscan and a
> > > vgchange. However now I'm using devfs, vgscan dooesn't find any of my
> > > volume groups - maybe because vgscan doesn't know to look in /dev/scsi or
> > > whatever. Is there a patch to fix this?
> >
> > vgscan (respectively the library routines involved) already
> > take care of devfs naming conventions.
> >
> > Did you mount devfs in linuxrc before running vgscan?
> >
> > Regards,
> > Heinz
> >
> > --
> >
> > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> >
> > Systemmanagement CS-TS                           T-Nova
> >                                                  Entwicklungszentrum Darmstadt
> > Heinz Mauelshagen                                Otto-Roehm-Strasse 71c
> > Senior Systems Engineer                          Postfach 10 05 41
> >                                                  64205 Darmstadt
> > mge@EZ-Darmstadt.Telekom.de                      Germany
> >                                                  +49 6151 886-425
> >                                                           FAX-386
> > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> >

-- 
"If anyone wants to be first, he must be the very last, and the servant
of all"

[linux-lvm] devfs

[Russell Coker]

It appears that devfs is not supported in LVM at this time (but I can't be 
certain because I haven't got it going properly yet).  What are the plans for 
devfs support?

I would like to get support for Devfs and LVM into a set of install disks for 
the Debian distribution of Linux in the near future...

Please let me know what the desired functionality is in this regard and I'll 
start coding next week.

-- 
http://www.coker.com.au/bonnie++/     Bonnie++ hard drive benchmark
http://www.coker.com.au/postal/       Postal SMTP/POP benchmark
http://www.coker.com.au/projects.html Projects I am working on
http://www.coker.com.au/~russell/     My home page

Re: [linux-lvm] devfs

[Luca Berra]

On Wed, Dec 13, 2000 at 09:17:41PM +0100, Russell Coker wrote:
> It appears that devfs is not supported in LVM at this time (but I can't be 
> certain because I haven't got it going properly yet).  What are the plans for 
> devfs support?

this is not exact, there is some devfs support in lvm 0.9, or
0.8 in kernels >= 2.4.0-test8, but it does not work!!!

i had to patch the lvm tools so they don't remove the /dev/<vgname> directory

also from my brief testing it seems that devfs tries to create the
/dev/vg/group node when activating the vg (while this should be done
during vgscan), but does not create the lv defice files.

Regards,
L.

-- 
Luca Berra -- bluca@comedia.it
        Communication Media & Services S.r.l.
 /"\
 \ /     ASCII RIBBON CAMPAIGN
  X        AGAINST HTML MAIL
 / \

Re: [linux-lvm] devfs

[Christoph Hellwig]

On Thu, Dec 14, 2000 at 04:41:53PM +0100, Luca Berra wrote:
> On Wed, Dec 13, 2000 at 09:17:41PM +0100, Russell Coker wrote:
> > It appears that devfs is not supported in LVM at this time (but I can't be 
> > certain because I haven't got it going properly yet).  What are the plans for 
> > devfs support?
> 
> this is not exact, there is some devfs support in lvm 0.9, or
> 0.8 in kernels >= 2.4.0-test8, but it does not work!!!
> 
> i had to patch the lvm tools so they don't remove the /dev/<vgname> directory
> 
> also from my brief testing it seems that devfs tries to create the
> /dev/vg/group node when activating the vg (while this should be done
> during vgscan), but does not create the lv defice files.

Right - you have to apply _two_ patches for the userlevel.

I had a system running devfs and LVM for a while but than switched back
to traditional /dev for other reasons.

	Christoph

-- 
Of course it doesn't work. We've performed a software upgrade.

Re: [linux-lvm] devfs

[Matthew O'Keefe]

On Wed, Dec 13, 2000 at 09:17:41PM +0100, Russell Coker wrote:
> It appears that devfs is not supported in LVM at this time (but I can't be 
> certain because I haven't got it going properly yet).  What are the plans for 
> devfs support?

THere is initial DEVFS support in LVM right now, and Heinz
is working on full DEVFS support for the next release. 

Matt O'Keefe



> 
> I would like to get support for Devfs and LVM into a set of install disks for 
> the Debian distribution of Linux in the near future...
> 
> Please let me know what the desired functionality is in this regard and I'll 
> start coding next week.
> 
> -- 
> http://www.coker.com.au/bonnie++/     Bonnie++ hard drive benchmark
> http://www.coker.com.au/postal/       Postal SMTP/POP benchmark
> http://www.coker.com.au/projects.html Projects I am working on
> http://www.coker.com.au/~russell/     My home page
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm