GRUB 2 and extending a LVM volume group

While installing security updates in a seldomly used virtual machine, the latest kernel package was ready to be configured when I got the following error:

Setting up linux-image-2.6.32-5-amd64 (2.6.32-31) ...
Running depmod.
Running update-initramfs.
update-initramfs: Generating /boot/initrd.img-2.6.32-5-amd64
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 2.6.32-5-amd64 /boot/vmlinuz-2.6.32-5-amd64
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 2.6.32-5-amd64 /boot/vmlinuz-2.6.32-5-amd64
Generating grub.cfg ...
/usr/sbin/grub-probe: error: Couldn't find PV pv1. Check your
run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1
Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-2.6.32-5-amd64.postinst line 799.
dpkg: error processing linux-image-2.6.32-5-amd64 (--configure):
 subprocess installed post-installation script returned error exit status 2
Errors were encountered while processing:

First I didn't quite get the line about "Couldn't find PV pv1. Check your", but after some time it dawned on me that "PV" might mean "physical volume", a term used by LVM. I also remembered that I extended the LVM volume group with an additional block device that I attached to the virtual machine.


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