• 9550SXU-16ML SATA RAID Controller with 4 x SFF8087(mini SAS) Connectors
• 64-bit/133MHz
• Ports: 16

You may need cables with each one coverting mini SAS(SFF8087) into 4 "Regular" SATA cables for SATA backplane with 4 SATA conectors!
OR
4 cables converting mini SAS(SFF8087) into multilane connector(SFF8470) for backplane with SFF8470 connectors!
OR
4 cables with mini SAS(SFF8087) to mini SAS(SFF8087) for backplane with SFF8087(mini SAS) connectors!

NOTE:SO you must choose right cables (Now some chassis has Mini SAS(SFF8087) on their backplanes!)!

Mini SAS connector(SFF8087) vs. Multilane connector(SFF8470)

Mini SAS connector (SFF8087)

Traditional Multilane connector(SFF8470)

3ware 9550SXU Features

• 7th-generation StorSwitch™ point-to-point, non-blocking switched architecture
• On-board PowerPC RISC processor provides true hardware RAID — SCSI device driver model to take advantage of the benefits of SCSI using inexpensive Serial ATA drives
• Bootable array support for greater fault tolerance
• Variable stripe size for performance tuning by application
• 64-bit LBA support
• ATA pass-through mode support
• Up to 256 MB DDR2 400 memory with ECC protection
• 32 pooled DMA channels
• 3ware BIOS Manager 2 (3BM2) – easy to use BIOS configuration tool
• 3ware Disk Manager 2 (3DM®2) – browser-based management tool
• Features include: secure access via ssh or https, create unit, delete unit, remove unit, import unit, migrate unit, verify unit rebuild unit
• Command Line Interface (CLI) – scriptable configuration tool
• SNMP support
• SMTP support for email/pager notification
• ATA/6 and Out of band (OOB) staggered drive spin-up support
• Auto carving allows logical units larger than 2 TB to be divided into multiple units for legacy operating systems that are limited to a maximum of 2 TB per logical unit
• StorSave platform for advanced performance tuning with the BBU
• Multiple logical unit sizes and RAID levels on one card
• Multiple card support within a system for large storage requirements
• Hot-swap and hot-spare support for data availability
• Dynamic sector repair for robust data protection
• S.M.A.R.T. disk drive monitoring for reliability
• Emergency Flash Recovery protects against failed firmware upgrade
• Drive activity LED support
• Online Capacity Expansion and RAID Level Migration
• Battery Backup Unit (BBU) ready
• Enhanced data protection with write journaling for non-redundant arrays and accidental drive removal
• Drive insertion and removal notification