6 of 15 Drives Detected

I hope this is the correct spot to put this. I'm having issues with FreeNAS 11.1-U4 detecting all of my drives as it will only detect 6 of 15.

I have a Dell R710 with an MD1000 and all 15 slots are filled with 2 TB drives. The MD1000 is connected with an External Mini-SAS HD SFF-8644 to Mini-SAS SFF-8470 Cable via an LSI SAS8300-8e. All 15 drives are detected from the BIOS and are available for boot selection or when using other operating systems such as FreeBSD 11.x or CentOS 7.

FreeNAS,...

6 of 15 Drives Detected