I'm aware I can't let my thin volume get full.  I'm actually about to
delete a lot of things.



I don't understand why it gave the sdh3 then sdh3, sdg3, sdf3 no space left
on device errors.  sdf3 has 366G left in its thin pool, and I asked to
create a virtual 200G within it.

I don't understand why it failed to write VG, or an MDA of VG.

I'm most concerned if anything's corrupted now, or if I can ignore this
other than that I couldn't create a volume.

disk1thin is on sdh3
disk2thin is on sdg3
disk3thin is on sdf3
disk4thin is on sde3

# lvs
...
  disk1thin                       lvm    twi-aot---  <4.53t
     84.13  76.33
  disk2thin                       lvm    twi-aot---  <4.53t
     85.98  78.09
  disk3thin                       lvm    twi-aot---  <4.53t
     92.10  83.47
  disk4thin                       lvm    twi-aot---   4.53t
     80.99  36.91
...
# lvcreate -V200G lvm/disk3thin -n test3
  WARNING: Sum of all thin volume sizes (21.22 TiB) exceeds the size of
thin pools and the size of whole volume group (<18.17 TiB).
  WARNING: You have not turned on protection against thin pools running out
of space.
  WARNING: Set activation/thin_pool_autoextend_threshold below 100 to
trigger automatic extension of thin pools before they get full.
  /dev/sdh3: write failed after 24064 of 24576 at 4993488961536: No space
left on device
  Failed to write VG lvm.
  Failed to write VG lvm.
  Manual intervention may be required to remove abandoned LV(s) before
retrying.
# lvremove lvm/test3
  /dev/sdh3: write failed after 24064 of 24576 at 4993488961536: No space
left on device
  WARNING: Failed to write an MDA of VG lvm.
  /dev/sdg3: write failed after 24064 of 24576 at 4993488961536: No space
left on device
  WARNING: Failed to write an MDA of VG lvm.
  /dev/sdf3: write failed after 24064 of 24576@4993488961536: No space
left on device
  WARNING: Failed to write an MDA of VG lvm.
  Logical volume "test3" successfully removed
# lvs --- shows test3 is gone

# pvs
  PV             VG     Fmt  Attr PSize    PFree
  /dev/sde3      lvm    lvm2 a--     4.54t <10.70g
  /dev/sdf3      lvm    lvm2 a--     4.54t      0
  /dev/sdg3      lvm    lvm2 a--     4.54t      0
  /dev/sdh3      lvm    lvm2 a--     4.54t      0
# vgs
  VG     #PV #LV #SN Attr   VSize   VFree
  lvm      4  51   0 wz--n- <18.17t <10.70g