How to use 2 NVMe drives first as SHR-1, then expand later with 1 or more NVMe drives without losing data?

[wcho-metrocsg]

As in the title, I want to use 2 NVMe drives now as SHR-1 with the ability to expand capacity later without losing data. How should I set this up initially? Then what do I do when I want to add additional NVMe drives to the pool?

[007revad]

Which Synology model and which DSM version? Is it a real Synology or Xpenology?

Do mean expand by replacing each NVMe drive, one at a time, with larger NVMe drives? In this case you'd be better off using RAID 1 as it's much simpler to expand the storage pool and volume.

Or do mean expand by adding a 3rd NVMe drive?

[wcho-metrocsg]

Xpenology DSM 7.2.1, DS3622xs+
NVMe drives all on PCIe adapter cards
Expand by adding a 3rd NVMe drive

[007revad]

I'm testing the required commands now. I started with 1 NVMe drive as SHR, then added a 2nd NVMe drive. It's currently doing the drive check. Once the drive check is done I'll add a 3rd NVMe drive and confirm it works without losing the existing data.

It will take me days, or even weeks, to create and test a "expand_m2_volume.sh" script. I want to include options for replacing drives with larger drives as well as adding extra drives.

I want to also do a "repair_m2_volume.sh" script for replacing a faulty NVMe drive.

[wcho-metrocsg]

Great. Thank you for working on this.

[abhathal]

I'm interested in this same topic, I set up a SHR-1 volume using the script with a single SSD. I'd like to expand this later with another drive of the same size depending on prices of drives. Even if not automated, are there some commands I could run once I get another SSD to add it to the volume? I'm using a synology ds423+ and both SSDs are/will be unofficial.

[007revad]

@abhathal
With a DS423+ just run https://github.com/007revad/Synology_HDD_db and storage manager will let you manage the NVMe drives as if they were Synology NVMe drives.

@wcho-metrocsg
Can you also try https://github.com/007revad/Synology_HDD_db

[abhathal]

Ah, very straightforward, thank you!