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[bug #38677] Warning about missing LVM PVs from 'grub-probe -t partmap'

From: Max Bowsher
Subject: [bug #38677] Warning about missing LVM PVs from 'grub-probe -t partmap'
Date: Sun, 07 Apr 2013 19:26:16 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.22 (KHTML, like Gecko) Ubuntu Chromium/25.0.1364.160 Chrome/25.0.1364.160 Safari/537.22

Follow-up Comment #5, bug #38677 (project grub):

In the interests of establishing whether there was any possibility of GRUB
being confused by past versions of the VG's metadata, I deactivated the VG
(vgchange -an), dd-ed zeros over the first 1MiB of sda1 and sdb1, and
re-initialized the LVM metadata from a backup (pvcreate --restorefile,

The problem persists unchanged.

My guesswork following this exercise is that 'grub-probe -t partmap' is only
looking at the device it was asked to discover the partmap type of, and then
running across a codepath which prints a warning because it didn't discover
all PVs in my LVM.

This guesswork is mainly informed by having noticed that running the
grub-probe -t partmap for any LV that is located on pv0 complains about not
finding pv1, and vice versa.


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