Is it possible to add an additional partition while rpi-clone performs an SD to NVMe clone?

[ERSBrad]

tl;dr: Can I create additional partitions with the rpi-clone script itself, or do I need an external tool? I see the -p flag, but I don't understand it completely tbh.

I currently have an Ansible script/role that takes a fresh RPI (5) Imager Raspbian image, updates the packages, clones from SD to NVME, changes the boot order and reboots before installing a bunch of other stuff. This works amazing, but I didn't realize I wanted to go the MicroCeph route until I started digging into HA storage solutions.

RPI Clone by default partitions my NVME drives this way on each device:

Disk /dev/nvme0n1: 953.87 GiB, 1024209543168 bytes, 2000409264 sectors
Disk model: ***                  
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: ***

Device         Boot   Start        End    Sectors   Size Id Type
/dev/nvme0n1p1         8192    1056767    1048576   512M  c W95 FAT32 (LBA)
/dev/nvme0n1p2      1056768 2000409263 1999352496 953.4G 83 Linux

Is it possible to add nvme0n1p3 on each of my devices via rpi-clone so that I can use the additional partition for MicroCeph? Any recommendations on partition sizes?

[framps]

Can I create additional partitions with the rpi-clone script itself, or do I need an external tool?

rpi-clone does not create any partitions. You have to use a tool like parted, fdisk or gparted to create additional partitions. rpi-clone will clone all partitions and the last partition will be resized accordingly if the size of the source device is different than the target device.