3par swap all pd to ssd

[wj-ave5]

Hi all,
i have a 3par 8200 with 32x600gb mechanical hdd (FC).
i purchased 12x1.92 tb ssd to replace all 32x600gb.
Following different instructions (https://community.hpe.com/t5/3PAR-StoreServ-Storage/Remove-a-PD-permanently/td-p/6965032), I dismissed FC one by one and added ssd.
Now I have all the 12 SSD active but I'm with last 4 FC disks that i cannot dismiss due to always present chunklets.
I tried movech, movepd with all options but chunklets are still there.
I also removed all CPG related to FC.

It seems system vvol admin and .srdata are on those disks.

Do you have idea on how to dismiss all the FC disks?
Thanks

[AlexFloyd]

I suppose that is not possible unless to return 3par in a "moment of birth" sate. I.e. reset system to factory defaults.