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From: Roger Heflin <>
To: LVM general discussion and development <>
Cc: alessandro macuz <>
Subject: Re: [linux-lvm] " Failed to find physical volume <ZFS block device"
Date: Thu, 23 Sep 2021 16:48:39 -0500	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

If you have lvmetad running and in use then the lvm commands ask it
what the system has on it.

I have seen on random boots fairly separated systems (rhel7 versions,
and many years newer fedora systems) at random fail to find one or
more pv.s

I have disabled it at home, and in my day job we have also disabled
(across 20k+ systems) as we confirmed it had inconsistency issues
several times on a variety of our newest installs.

Stopping lvmetad and/or restarting it would generally fix it.    But
it was a source of enough random issues(often failure to mount on a
boot, so often issues that resulted in page-outs to debug)  and did
not speed things up much enough to be worth it even on devices with
>2000 SAN volumes.

On Thu, Sep 23, 2021 at 8:52 AM Zdenek Kabelac <> wrote:
> Dne 22. 09. 21 v 18:48 alessandro macuz napsal(a):
> > fdisk correctly identifies the extended partition as 8e.
> > I wonder which kind of data lvmdiskscan and pvs use in order to list LVM
> > physical volumes.
> > Does PVS check some specific metadata within the partition without just
> > relying on the type of partition displayed by fdisk?
> >
> >
> Hi
> Yes - PVs do have header signature keeping information about PV attributes
> and also has the storage area to keep lvm2 metadata.
> Partition flags known to fdisk are irrelevant.
> Regards
> Zdenek
> _______________________________________________
> linux-lvm mailing list
> read the LVM HOW-TO at

linux-lvm mailing list
read the LVM HOW-TO at

  parent reply	other threads:[~2021-09-23 21:49 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-21 23:36 alessandro macuz
2021-09-22 16:48 ` alessandro macuz
2021-09-23 13:51   ` Zdenek Kabelac
2021-09-23 18:03     ` alessandro macuz
2021-09-23 18:43       ` Zdenek Kabelac
2021-09-23 21:48     ` Roger Heflin [this message]
2021-09-26 14:22       ` alessandro macuz
2021-09-28 18:47         ` Roger Heflin

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