IN RHEL9, the way of implementing VDO (VIrtual Data Optimizer) has been changed and VDO commands are deprecated.
suppose you will be using /dev/sdc partition for VDO with a logical size given in question and mount under /vdo_test directory.
Instead of use this below VDO command:
vdo create --name=vectra --device=/dev/sdc --vdoLogicalSize=50G
Use these commands like:
pvcreate /dev/sdc
vgcreate volume_grp /dev/sdc
lvcreate --type vdo --name new_lv_vdo --size 5GB --virtualsize 50GB volume_grp
mkfs.xfs -K /dev/volume_grp/new_lv_vdo
mkdir /vdo-test
#add entry of this in /etc/fstab
/dev/volume_grp/new_lv_vdo xfs defaults 0 0
mount -av
