What does "_rimage_" mean?

[Airw0lf]

I'm using two Proxmox systems. Both have raid 0 volumes. However, the LVS-output varies a bit.
Two volumes are showing something with "_rimage_" in the device list.And one is not:

lvs -a -o name,devices,stripe_size

  LV                      Devices                                           Stripe

  addn-volumes            addn-volumes_rimage_0(0),addn-volumes_rimage_1(0) 64.00k
  [addn-volumes_rimage_0] /dev/sdc(0)                                           0
  [addn-volumes_rimage_1] /dev/sdd(0)                                           0

  nas-volume              nas-volume_rimage_0(0),nas-volume_rimage_1(0) 64.00k
  [nas-volume_rimage_0]   /dev/sda(0)                                       0
  [nas-volume_rimage_1]   /dev/sdb(0)                                       0

  all-PVE-volumes         /dev/sda(0),/dev/sdb(0)                           64.00k

All volumes are created with LVM and based on the on-board sata ports.
All disks are WD/Hitach sata spindle disks.

I'm using PVE version 8.3.2. with an AMD B550 chipset.
One system is based on the Asus TUF B550-Plus and the other Asus TUF B550M-Plus.
Both have a AMD Ryzen 7 5700X installed.

What is the meaning of this "_rimage_"?
What could be a reason that this is not shown with the "all-PVE-volumes"-volume.

Google search is not very helpfull here...