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From: Zdenek Kabelac <zdenek.kabelac@gmail.com>
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Date: Tue, 12 Dec 2017 16:22:15 +0100
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Subject: Re: [linux-lvm] LVM2 - pvresize alert
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To: LVM general discussion and development <linux-lvm@redhat.com>, =?UTF-8?Q?VESEL=c3=8dK_Jan?= <jveselik@csob.cz>

Dne 12.12.2017 v 14:13 VESELÍK Jan napsal(a):
> Hello,
> 
> I would like to suggest small tweak in command pvresize. If you use parameter 
> –setphysicalvolumesize, you will get only pasive wargning with this 
> potentially dangerous action. In comparrison to lvresize with parameter –L -, 
> meaning making logical volume smaller, you receive warning and prompt to 
> continue.
> 
> Is it possible to implement this kind of prompt to enter yes or no before 
> every lvm action that could pottentially lead to data loss.

Hi

Latest versions (>= 2.02.171) of lvm2 provides this prompt:


# pvs
   PV         VG Fmt  Attr PSize   PFree
   /dev/loop0 vg lvm2 a--  <30,00g <30,00g


# pvresize --setphysical 1T /dev/loop0
   WARNING: /dev/loop0: Overriding real size 30,00 GiB. You could lose data.
/dev/loop0: Requested size 1,00 TiB exceeds real size 30,00 GiB. Proceed?  [y/n]:



Regards

Zdenek