Re: [linux-lvm] bug: raid1 sub-devices are scanned too

["Heinz J . Mauelshagen" <mauelshagen@sistina.com>]

Erkkhi,

this is a bug in 1.0.3 with exported VGs.

If you import your VG "mirror" again, you should be fine.
Rather than imprting, "vgscan -f" should work as well.

Will look into it.

Regards,
Heinz    -- The LVM Guy --


On Sat, Feb 23, 2002 at 03:55:05AM +0200, Erkki Seppala wrote:
> Whether the bugzilla is publicly open is unclear to me, atleast there
> didn't seem to be a link there in sistina.com/lvm - or I didn't find
> it.
> 
> Actually I'm not sure if there is a real reason to fix this, as it
> would need making vgscan understand more about the raid-stuff, but it
> sure does look confusing. Perhaps a generic facility to "blind out"
> devices from it? Perhaps this kind of capability should be in the
> kernel, not just for LVM..
> 
> I recently had a problem with a volume group reusing an existing
> logical volume number, but I resolved that, as vgscan suggested, with
> vgexport/vgimport. However, this bug appeared:
> 
> vgscan -- reading all physical volumes (this may take a while...)
> vgscan -- found active volume group "mirror"
> vgscan -- found active volume group "ibm9"
> vgscan -- found active volume group "archive"
> vgscan -- found inactive volume group "mirrorPV_EXP"
> vgscan -- ERROR: VG "mirrorPV_EXP" reuses an existing VG number; please vgexport/vgimport that VG or use option -f
> vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
> vgscan -- WARNING: This program does not do a VGDA backup of your volume groups
> 
> I imagine this is because /dev/md/1 is raid1 and consists of
> /dev/ide/host0/bus1/target1/lun0/part1 and
> /dev/ide/host0/bus0/target1/lun0/part1. Output of pvscan:
> 
> pvscan -- reading all physical volumes (this may take a while...)
> pvscan -- ACTIVE   PV "/dev/md/1"                               of VG "mirror"       [55.91 GB / 13.89 GB free]
> pvscan -- inactive PV "/dev/ide/host0/bus1/target1/lun0/part1"   is in EXPORTED VG "mirror" [55.91 GB / 13.89 GB free]
> pvscan -- inactive PV "/dev/ide/host0/bus0/target1/lun0/part1"   is in EXPORTED VG "mirror" [55.91 GB / 13.89 GB free]
> pvscan -- total: 6 [311.82 GB] / in use: 5 [290.79 GB] / in no VG: 1 [21.03 GB]
> 
> (some lines removed)
> 
> I run kernel 2.4.16 and LVM-tools from today's CVS.
> 
> Btw, during the original repairing I saw a situation where one of my
> volume groups (archive) was twice in /proc/lvm/global. That's not
> healthy, is it? I imagine it had something to do with the fact that
> after scanning volume group "archive" it failed to scan volume group
> "mirror" (due to the reuse-problem), and I kept trying different
> stuff..
>  
> --
>   _____________________________________________________________________
>      / __// /__ ____  __                              Erkki Seppälä\   \
>     / /_ / // // /\ \/ //ircnet                           Modeemi Ry\  /
>    /_/  /_/ \___/ /_/\_\@modeemi.fi        http://www.modeemi.fi/~flux/
> 
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*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
                                                       FAX 924446
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