can I convert a linear thin pool to raid1?

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In the past, I've used LVM on MD RAID, and I'd like to try using LVM RAID in order to also add dm-integrity data to some LVs.  I've added new PVs to my VG, and I've converted some of my LVs to raid1 types, but I also have one thin pool that I use for VMs with multiple layers of snapshots.  That pool can't be converted, directly:

# lvconvert --type raid1 -m 1 VolGroup/vm_pool --yes
  Operation not permitted on LV VolGroup/vm_pool type thinpool.

Is it sufficient to simply convert the tdata and tmeta LVs to raid1 type?  Should I also convert lvol0_pmspare?  Is there anything else I should consider?

# lvs VolGroup/vm_pool VolGroup/vm_pool_tmeta VolGroup/vm_pool_tdata VolGroup/lvol0_pmspare   LV              VG       Attr       LSize   Pool Origin Data% Meta%  Move Log Cpy%Sync Convert
  [lvol0_pmspare] VolGroup ewi-a----- 128.00m
  vm_pool         VolGroup twi-aotz-- 200.00g             12.83 15.93
  [vm_pool_tdata] VolGroup Twi-ao---- 200.00g
  [vm_pool_tmeta] VolGroup ewi-ao---- 128.00m


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