Re: [linux-lvm] Duplicate device numbers -- my fault.

["Heinz J . Mauelshagen" <mauelshagen sistina com>]

Chris,

the upgrade instructions are obsolete now for users, who want to upgrade beyond
LVM 0.9.1 Beta 7 as announced on Friday, because we found a neater way to
update *without* running an explicite upgrade tool.

LVM 1.0.1-rc1 is able to read the old metadata fromat directly and
support it :-)

Well, we really had prefered to have the idea for this earlier ;-)

On Fri, Aug 17, 2001 at 02:33:15PM +0100, Chris Ritson wrote:
> I have now RRRTFM and have realised that when upgrading with 
> pvversion(0.91-b8) I had the beta8 tools first in my path. Presumably this 
> explains my corrupt logical volumes. I have recovered from backups.
> 
> Now the real reason for sending this. For people like me, could the upgrade 
> instuctions be changed to include the following:-
> 
> 2a) Check that the OLD pvm tools are first in your path:
>      # pvdisplay -?
>      The first line of output shows the version of pvdisplay this should be 
> the OLD version 0.91_beta7 or earlier. Maybe the pvversion script could be 
> updated to automate this, making it fail safe.
> 
> 
> Another enhancement would have made my life easier, but this could be harder:-
> 
> Presumably when vgscan is run at boot time, it is reading metadata from the 
> volume groups it finds, including their last used minor device numbers. If 
> this tool finds duplicates (as I ended up with) would it make sense for it 
> to stop and report the error. Maybe even "vgchange -ay" could be arranged 
> not to activate the offending volume groups. This would have alerted me to 
> my error far earlier, but could I suppose have cuased problems had I had 
> root-on-LVM.

We already planned to change the minor number allocation scheme in a future
release in order to avoid this (and other problems).

> 
> Chris Ritson
> --
> EMAIL:	C R Ritson newcastle ac uk	POST:	Chris Ritson,
> PHONE:	+44 191 222 8175			Department of Computing Science,
> FAX :	+44 191 222 8232				University of Newcastle upon Tyne,
> ROOM:	618 Claremont Bridge (the Mill)		United Kingdom NE1 7RU.
> 
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-- 

Regards,
Heinz    -- The LVM Guy --

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

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