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Re: [linux-lvm] Installation fails if VG is exported



On Tue, 7 Jun 2011, Stuart D. Gathman wrote:

Exporting the VG is *supposed* to prevent activation. You can reverse this with vgimport. Why did you wish to prevent activation? Normally,
vgexport is used prior to physically removing a VG from the system.  (And
then vgimport after attaching the drives to the new system.)

Well, I just want to keep my data intact while i'm playing with the
installation. I understand that @ this point it's just easier to pull
the power on the HDs with the VG in question. But i'm curious why this
is a problem...

It isn't a problem, unless you expect the VG to be available at boot time,
which apparently you do.  Do you have a root FS on the VG?

I get it - you wanted to prevent your OS experimentation from activating and
possibly writing over your VG.  I can understand why vgexport seemed like
a solution, but it only prevents activation and removes references from
local LVM configuration (and prevents booting when that depends on the VG as
you discovered).

It doesn't prevent a rogue/buggy OS from scribbling on the disks.  So,
physically disconnecting (or powering off) the disks is the best way
to prevent that.

--
	      Stuart D. Gathman <stuart bmsi com>
    Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.


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