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List:       evms-devel
Subject:    Re: [Evms-devel] evms-lvmutils: evms_vgreduce failure, gui not flexible
From:       Eduard Bloch <edi () gmx ! de>
Date:       2002-05-23 12:38:53
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#include <hallo.h>
Andreas Dilger wrote on Wed May 22, 2002 um 04:08:38PM:

> > evms_vgreduce -- Found segment hdb1 at handle 81
> > evms_vgreduce -- Error removing PV /dev/hdb1 from container lvm (22)
> > 
> > So is there a sane way to make a partition free and remove if from LVM
> > control, without damaging the data around it? I also tried to bind the
> > partitions with the DriveLink plugin. Unfortunately, it breaks when I
> > try to shrink and remove a partition which is not the last one in the
> > DriveLink'ed object ("Operation not permitted").
> 
> So what do you think should happen to a filesystem when you remove a
> chunk of disk from the middle of it?  It just isn't possible to do
> this sanely in the way you propose.

I did not want to make holes in the volume, of course not. I shinked the
filesystem to have enough space to remove the partition in the middle. I
expected that the extens belonging to the middle-partition are moved
into the free area. Automaticaly, without moving the data to a
replacement disk manually.

> What you _probably_ want to do is something like (sorry, don't know EVMS
> syntax for this) "pvmove /dev/hdb1" to migrate all of the data from hdb1
> to some other disk, and _then_ remove hdb1 from the LVM configuration.

Yeah, something like that. I see that vgreduce was the wrong tool, but
there should be at least a more helpful error message.

Gruss/Regards,
Eduard.
-- 
We just typed make... 
(Stephen Lambrigh, Director of Server Product Marketing at Informix
 about porting their Database to Linux)


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