LSI 3ware 9750-16i4e SATA+SAS RAID Controller Card 20 port.

Taken from working video storage server and held as spare.
The LSI 3ware 9750 SATA+SAS RAID controller card provides
these features:
„ Support for up to 127 SAS and/or SATA devices per controller,
single port only.
„ Release 10.2 adds external support.
„ OS support includes FreeBSD®, Linux®, Mac OS® X,
OpenSolaris™, VMware®, and Windows®.
„ RAID 6 with simultaneous parity generation to maximize
performance.
„ LSI 2108 RAID-on-Chip (ROC) hardware platform.
„ StreamFusion™+ optimization of RAID 5 and RAID 6 disk
accesses to maximize application performance under heavy
loads.
„ StorSave™ Battery Backup Unit (BBU) with write journaling
to optimize data protection and performance (BBU must be
purchased separately, see Step 2 on page 14).
„ Hot-swap and hot-spare for data availability.
„ RAID levels 0, 1, 5, 6, 10, 50, and Single Disk
„ Up to 6 Gbps per port data transfer rates
„ Support for 3 Gbps and 6 Gbps, SATA and SAS, Hard Disk
Drive (HDD) and Solid State Disk (SSD) technologies.
„ Onboard ECC DDRII SDRAM