iDRAC/racadm create virtual disk with fast initialization

Hello, I'm trying to configure virtual disks through SSH/racadm on a PowerEdge C6525 with a PERC H350.

When I use the System Setup, I can select "Default Initialization: No/Fast/Full", while when I use racadm it looks like it defaults to Full initialization.

The commands I'm using are like:

racadm storage converttoraid:Disk.Bay.1:Enclosure.Internal.0-1:RAID.Slot.1-1 -mdtype linux

racadm storage converttoraid:Disk.Bay.1:Enclosure.Internal.1-1:RAID.Slot.1-1 -mdtype linux

racadm storage createvd:RAID.Slot.1-1 -rl r1 -pdkey:Disk.Bay.0:Enclosure.Internal.0-1:RAID.Slot.1-1,Disk.Bay.1:Enclosure.Internal.0-1:RAID.Slot.1-

racadm jobqueue create RAID.Slot.1-1 -s TIME_NOW --realtime

It looks like there is no option for initialization speed in createvd help, and if I try to issue a separate initialization command like

racadm storage init:Disk.Virtual.0:RAID.Slot.1-1 -speed fast

if it's before the job creation, the virtual disk is not found; if it's after the job completion the init fails with "One or more Storage device(s) are not in a state where the operation can be completed." and in the System Setup the Virtual Disk is shown in "Background Initialization"

How should I proceed? Thanks in advance