LVM: Vgextend cannot find correctly created PV

roelvdh · 04-05-2022, 03:57 PM

I installed a new PV on a partition in a USB flash drive:

Quote:

[root@dotter39 ~]# pvcreate /dev/sdf2
Physical volume "/dev/sdf2" successfully created.

The PV seemed to be there:

Quote:

[root@dotter39 ~]# pvs
PV VG Fmt Attr PSize PFree
.... .... ... ... ... ...
/dev/sdf2 lvm2 --- <887,81g <887,81g

However, Vgextend cannot find it:

Quote:

[root@dotter39 ~]# vgextend COMMS /dev/sdf2
Failed to find PV /dev/sdf2

What could possibly go wrong here?

Edit: Tried pvchange:

Quote:

[root@dotter39 ~]# pvchange -x y /dev/sdf2
Allocatability not supported by orphan lvm2 format PV /dev/sdf2
Physical volume /dev/sdf2 not changed
0 physical volumes changed / 1 physical volume not changed

The PV is not allocatable according to pvdisplay:

Quote:

"/dev/sdf2" is a new physical volume of "<887,81 GiB"
--- NEW Physical volume ---
PV Name /dev/sdf2
VG Name
PV Size <887,81 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID vHWlRK-E92J-bYYM-5aFC-JRIC-eo3e-h8xV71

I have put an ext4 fs on /dev/sdf2, though

Ser Olmy · 04-07-2022, 05:18 PM

Quote:

Originally Posted by roelvdh

The PV is not allocatable according to pvdisplay:

I have put an ext4 fs on /dev/sdf2, though

You've done what? Written a filesystem to a partition that's supposed to be used as an LVM Physical Volume?!?

roelvdh · 04-08-2022, 01:57 AM

I knew it made no sense but just followed the "format PV /dev/sdf2" line of pvchange.
Edit: The problem is not lvm2 but is in the partition table. Strange, as using gdisk did not generate any errors while making the partition. Problem solved.