Re: [Xen-users] pygrub lvm partition & grub.cfg question

To:	"Fajar A. Nugraha" <fajar@xxxxxxxxx>
Subject:	Re: [Xen-users] pygrub lvm partition & grub.cfg question
From:	Bruce Edge <bruce.edge@xxxxxxxxx>
Date:	Sun, 11 Jul 2010 12:53:16 -0700
Cc:	Xen users mailing list <xen-users@xxxxxxxxxxxxxxxxxxx>
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On Sun, Jul 11, 2010 at 5:40 AM, Fajar A. Nugraha <fajar@xxxxxxxxx> wrote:

On Sun, Jul 11, 2010 at 6:41 AM, Bruce Edge <bruce.edge@xxxxxxxxx> wrote:
> pygrub /dev/mapper/dpm_0:
>
> pyGRUB version 0.6
> ┌────────────────────────
> │ dpm-domu , with Linux 2.6.32.16
> The 2nd boot entry is missing - why is it not seeing the embedded partition?
> But if I run
> pygrub /dev/mapper/dpm_0p1, I see the new boot entry::
> pyGRUB version 0.6
> ┌────────────────────────
> │ dpm-domu , with Linux 2.6.32.16
> │ dpm-domu , with Linux 2.6.32
> Shouldn't pygrub see the 2nd boot entry when pointed at the lvm partition
> /dev/mapper/system-dpm_0
> as opposed to the embedded partition pygrub /dev/mapper/dpm_0p1 ?
> Where is the second copy of the grub.cfg?
> I thought there was no boot sector grub.cfg anymore.
> Is that not the case?

Short summary, there might be some caching issue involved there. Try
something like

echo 3 > /proc/sys/vm/drop_caches

Then test again with pygrub

That was it. Thanks!

I would have thought that 'sync' would do the same thing, but it doesn't.

-Bruce

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Re: [Xen-users] pygrub lvm partition & grub.cfg question