From mboxrd@z Thu Jan  1 00:00:00 1970
Subject: Re: [linux-lvm] vgchange doesn't enable found VGs
From: "Brian J. Murrell" <brian@interlinx.bc.ca>
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Date: Fri, 27 Feb 2009 12:30:30 -0500
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On Fri, 2009-02-27 at 17:02 +0000, Bryn M. Reeves wrote:
>=20
> So it's not scanning /dev/sda at all (only ramdisks?).

So it seems, yes.

> Do you have any
> filter settings in lvm.conf

devices {
    dir =3D "/dev"
    scan =3D [ "/dev" ]
    preferred_names =3D [ ]
    filter =3D [ "a/.*/" ]
    cache_dir =3D "/etc/lvm/cache"
    cache_file_prefix =3D ""
    write_cache_state =3D 1
    sysfs_scan =3D 1     =20
    md_component_detection =3D 1
    ignore_suspended_devices =3D 0
}

>  and are you sure that the SD device nodes
> will have been created at this point in the boot process?

Well, the data from the previous message was done on a fully booted
machine, complete with /dev/sda being present for many, many minutes if
not hours.

> You don't mention the distribution you're using

RHEL5.2.

> but most 2.6 based
> setups will use udev to manage driver loading and device node creation
> during boot. It's possible for these to get out of sync in some cases.

Yes, but again, the data I am giving you is being taken from a
completely up and running system.

> Is there any way you can grab a listing of /dev at the moment the
> vgchange runs during boot?

Not relevant per above.

> Did it scan /dev/sda this time?

Yes.

> Just to be clear, are you only seeing this problem during boot or are
> you able to reproduce once the system has completed booting (i.e.
> vgchange -ay fails but vgchange -ay <vg name> succeeds)?

As per the above, I can reproduce on a completed booted system.

b.


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