Running on an R720xd with an h310 mini    

Main array is on a LSI SAS2308, no issues there.

[0:0:0:0]disk USB DISK 2.0 PMAP /dev/sda 15.5GB
[1:0:2:0]disk ATA SATA SSD 61.2 /dev/sdb 1.02TB
[1:0:5:0]disk ATA SATA SSD BA.3 /dev/sdc 1.02TB
[1:0:8:0]disk ATA SATA SSD BA.3 /dev/sdd 1.02TB
[1:0:11:0]disk ATA SATA SSD 61.2 /dev/sde 1.02TB
[1:0:13:0]disk ATA SATA SSD 61.2 /dev/sdf 1.02TB
[2:0:0:0]disk ATA WDC WD80EMAZ-00W 0A83 /dev/sdg 8.00TB
[2:0:1:0]disk ATA WDC WD80EMAZ-00W 0A83 /dev/sdh 8.00TB
[2:0:2:0]disk ATA WDC WD80EMAZ-00W 0A83 /dev/sdi 8.00TB
[2:0:3:0]disk ATA ST8000DM004-2CX1 0001 /dev/sdj 8.00TB

Using fdisk or looking at system devices I can see all of the SSDs

 

However they are not available for me to use as cache devices and do not show up under unassigned devices...

 

Now I have ran this particular setup before, however I moved the SSDs to another system for a while and ran them in a raid 10. I've manually made a btrfs file system on each of these without issue, yet I am still unable to see them.

 

I'll note I had issues in ESXi before with wwnn being the same or something like that, these are cheap micro center house brand disks. I did check, and I can see them with different UUIDs 

Tools - Diagnostics. Attach complete Diagnostics zip file to your next post.