Re: [linux-lvm] Re: partition table read incorrectly

[Wichert Akkerman <wichert@cistron.nl>]

Previously Andreas Dilger wrote:
> If you already have data on the PV in
> question, you can "dd if=/dev/zero of=/dev/sdb bs=1 seek=510 count=2"
> to remove only the partition signature.

That helped and the kernel no longer sees that partition anymore.
However LVM still doesn't work:

cloud:/dev/discs/disc1# vgscan
vgscan -- reading all physical volumes (this may take a while...)
vgscan -- found active volume group "vg_user"
vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
vgscan -- WARNING: This program does not do a VGDA backup of your volume group

cloud:/dev/discs/disc1# vgchange -a y
vgchange -- ERROR: VGDA in kernel and lvmtab are NOT consistent; please run vgscan

I did a bit of looking around and it seems the confusement is in the
kernel: when lvm_check_kernel_lvmtab_consistency() compares the kernel
and the lvmtab entries the list from the kernel mentions the vg_user
volume group twice, while the lvmtab only mentions it once.

Wichert.

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