[linux-lvm] Thank you...

Heinz J . Mauelshagen mauelshagen at sistina.com
Mon Apr 14 04:34:01 UTC 2003

On Thu, Apr 10, 2003 at 04:47:31PM -0400, travis at usi.net wrote:
> Hello All,
> 	Just wanted to give a special thanks to Anders Widman
> and Heinz Mauelshagen for their help in resolving the error
> condition I was receiving with my disk devices while trying to
> run vgexport.  It was, in fact, duplicate PV entries in the
> directory /etc/lvmconf  Apparently, the devices were used
> previously as part of another volume group and the entries were
> never cleaned up!  I am back up and running now so thanks!
> 	I have a quick question on the ability of LVM with 
> respect to redudant paths.  With my HP servers we are able
> to run vgextend after vgcreate has created a volume group to
> indicate an alternate path.  Like so:
> 	# pvcreate /dev/rdsk/c2t0d1
> 	# pvcreate /dev/rdsk/c2t1d1
> 	# mkdir /dev/vgoradata
> 	# mknod <truncated>
> 	# vgcreate /dev/vgoradata /dev/dsk/c2t0d1
> 	<Now, here is what I would like to do with 
> 	LVM on Linux>
> 	# vgextend /dev/vgoradata /dev/dsk/c2t1d1
> 	# lvcreate -l 4000 -n oradata /dev/vgoradata
> 	# lvextend -m 1 /dev/vgoradata/oradata
> Now, I am using 1.0.3 and before I tear my current setup down
> I was wondering if there is a way to do the same thing with
> LVM for Linux (maybe 2.0 supports this???).  Okay, again, thank
> you for your time!!!


IBM Germany coded a multipath extension for LVM1 which got included
in the SuSE distribution (not supported by Sistina).
You should be able to get patches from them.

Because Sistina offers LVM2/device-mapper (L)GPLed which gets all new
features added, we discontinued to add any new features to LVM1 about
a year ago. We _do_ support LVM1 (bug fixes, user support).

We are close to the LVM2.0 release which will be LVM1 feature compatible.

Multipathing (or redundant paths) is a planned 2.2 feature.

> Cheers,
> Travis
> _______________________________________________
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> linux-lvm at sistina.com
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/


Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***


Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
Mauelshagen at Sistina.com                           +49 2626 141200
                                                       FAX 924446

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