M.2 NVME Caching on a TS-262 Nas

I have recently purchased a TS-262 Nas with two WD RED 4TB drives and two Crucial 1TB each M.2 Nvme SSD drives.
I have create a storage pool in SSD 1 which now has all my apps loaded on it.
The two WD Red drives have been set up as a Raid 1 for data storage, so i was thinking i could use SSD 2 for caching? Not sure if i need to create a pool on SSD 2 to use as caching?

Join the second M2 to the first one to make a RAID1 for your system volume. Forget about caching (and certainly never use cache on a single SSD)

Cache has only very specific use cases and most people do not fullfill these.

Thank you doblyman. I did as you suggested and created a RAID1 with the two M.2 strips on the board and created a storage pool 1 on them.
I did this via a fresh re-initialization, which resulted in the basic apps being loaded on the M.2s.
I then added the two HDD’s and formatted them into a RAID 1 and Storage pool 2.
The result is a very quiet NAS, bonus but I do have a little problem. The initialization process has meant that the default folder e.g. Multimedia, Home, Public etc have been created on the M2 stips. I would like to move them to the HDD, do you know if these can be moved?

These are the default system folders, you can just ignore them. Create your own folders on the HDD volume and use those

Hi dolbyman, understood but there seems to be some apps that default to these folder and also as there is a folder “Multimedia” the system will not let me create another folder of the same name in the storage pool 2. A little annoying but not the end of the world.

Don’t use any QNAP apps and it should be fine.