[linux-lvm] Device XXX excluded by a filter - why??

[Marian Csontos]

On 05/23/2018 05:53 PM, Wyllys Ingersoll wrote:
> Using the following lvm2 version on Ubuntu 16.04.3 running kernel 4.16.03
>    LVM version:     2.02.176(2) (2017-11-03)
>    Library version: 1.02.145 (2017-11-03)
>    Driver version:  4.37.0
> 
> ceph-volume attempts to create a VG on a raw block device to use as a
> bluestore OSD.  The command it uses looks like this:
> 
> vgcreate --force --yes ceph-a637b0e7-e54f-4fe9-8afc-a74671d94f6e /dev/sdi
> 
> The disk (/dev/sdi) in this case is a blank (no partition table) GPT
> label 3.7T drive.

So is it a GPT device or not? If yes, it HAS a partition table after 
all, and LVM filters such devices out, even if the partition table is empty.

Run `wipefs -a /dev/sdi` first to remove any FS/GPT signatures.

-- Martian
> 
> vgcreate complains and fails:
>       stderr: Device /dev/sdi excluded by a filter.
> 
> I cannot figure out what "filter" is causing this.  The global_filter
> in lvm.conf is wide open:
> filter = [ "a|.*/|" ]
> 
> Turning up debug logging does not show any additional reasons.
> Repeatedly running pvscan or vgscan to update the cache does not fix
> it either.
> 
> What could be blocking this device from being used?
> 
> thanks,
>     Wyllys Ingersoll
>     Keeper Technology, LLC
> 
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