[linux-lvm] 2.2.15 Kernel LVM 0.8 vgscan -- invalid i/o proto

[Heinz Mauelshagen]

> > You don't need a newer kernel. The format changed between <= 0.8 and 0.8final.
> > You have to re-create your physical volumes and to re-compile the new lvm-utils.
> 
> As far as i recall the physical format should be the same. Only the
> format of the data exchanged between kernel and user mode was changed.

Absolutely!

The i/o protocol related message tells you that you have a driver/library
combination which would mess with the data exchanged between user and
kernelspace.

The physical on disk metadata format (the so called VGDA) didn't change!

In future cases where I possibly have to change the VGDA on the disks i'll
provide transparent library functions which do the changes (actually i had this
case already and nobody complained).

Message: I don't like to destroy your installed configurations out there ;-{)

> 
> So using user-mode tools which are compatible with the LVM kernel
> components should be sufficient - no re-creation of PVs or other
> drastic options should be required.

Correct.

Regards,
Heinz

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