[UBUNTU] Avoid creation of mixed-blocksize PV on LVM volume groups

Setup with mixed PVs (on dasds forced with dasdfmt):

ubuntu@eoan-disktest:~$ sudo pvdisplay
  "/dev/vdc1" is a new physical volume of "<6.88 GiB"
  --- NEW Physical volume ---
  PV Name /dev/vdc1
  VG Name
  PV Size <6.88 GiB
  Allocatable NO
  PE Size 0
  Total PE 0
  Free PE 0
  Allocated PE 0
  PV UUID GqEvSA-Qalj-415c-01i7-0Zxb-gXTW-oUd7BW

  "/dev/vdd1" is a new physical volume of "<6.88 GiB"
  --- NEW Physical volume ---
  PV Name /dev/vdd1
  VG Name
  PV Size <6.88 GiB
  Allocatable NO
  PE Size 0
  Total PE 0
  Free PE 0
  Allocated PE 0
  PV UUID iMkCz2-JfSi-59ZS-RCzr-nAdC-9SUf-U9EeOu

  "/dev/vde1" is a new physical volume of "3.51 GiB"
  --- NEW Physical volume ---
  PV Name /dev/vde1
  VG Name
  PV Size 3.51 GiB
  Allocatable NO
  PE Size 0
  Total PE 0
  Free PE 0
  Allocated PE 0
  PV UUID vuWlZW-lALQ-Om05-a57f-e0Qu-pE4W-6Rmqyn

  "/dev/vdf1" is a new physical volume of "3.51 GiB"
  --- NEW Physical volume ---
  PV Name /dev/vdf1
  VG Name
  PV Size 3.51 GiB
  Allocatable NO
  PE Size 0
  Total PE 0
  Free PE 0
  Allocated PE 0
  PV UUID OkVIqF-yXA3-MHPr-b3ON-A6Ua-d5GZ-QOHUae

ubuntu@eoan-disktest:~$ sudo blockdev --getss /dev/vdc1 /dev/vdd1 /dev/vde1 /dev/vdf1
4096
4096
512
512

out of these creating mixed size VG and LV:
$ sudo vgcreate vol_grp1 /dev/vdc1 /dev/vdd1 /dev/vde1 /dev/vdf1
$ sudo lvcreate -l 18 -n log_vol1 vol_grp1
$ sudo lvdisplay
  --- Logical volume ---
  LV Path /dev/vol_grp1/log_vol1
  LV Name log_vol1
  VG Name vol_grp1
  LV UUID SNbOFb-F233-2RYv-rjy4-iGW6-Fmo0-f0NNU0
  LV Write Access read/write
  LV Creation host, time eoan-disktest, 2019-09-09 14:51:41 +0000
  LV Status available
  # open 0
  LV Size 72.00 MiB
  Current LE 18
  Segments 1
  Allocation inherit
  Read ahead sectors auto
  - currently set to 256
  Block device 253:0

Updating to the test build with the requested fix (after lvremove/vgremove).

Now the same create gives me
$ sudo vgcreate vol_grp1 /dev/vdc1 /dev/vdd1 /dev/vde1 /dev/vdf1
  Devices have inconsistent logical block sizes (4096 and 512).
  See lvm.conf allow_mixed_block_sizes.
$ echo $?
5

I can throw this line into lvm.conf devices section:
        allow_mixed_block_sizes = 1
to make it work again.

I personally miss an entry to the man page or the default .conf file.
I might need to take a look if that was added in another commit, but functionally it looks good already. But if anyone wants the PPA would be already testable.

I added the conffile changes to the open MP.
Waiting for a review before the upload ..

This bug was fixed in the package lvm2 - 2.03.02-2ubuntu6

---------------
lvm2 (2.03.02-2ubuntu6) eoan; urgency=medium

  * d/control: stop dropping thin-provisioning-tools to Suggests as it
    is ready to be promoted via MIR LP 1828887. Fixes usability issues
    of thin-provisioning-tools not being installed by default (LP: #1657646).
    - d/control: also add thin-provisioning-tools build-dep as configure
      wants it around for some checks at build time.
  * d/p/lp-1842436-*: Avoid creation of mixed-blocksize PV on LVM
    volume groups as it can cause FS corruption (LP: #1842436)

 -- Christian Ehrhardt <email address hidden> Fri, 06 Sep 2019 08:23:10 +0200

------- Comment From <email address hidden> 2019-09-10 08:02 EDT-------
IBM Bugzilla status -> closed, Fix Released with Eoan