StarTech.com Mini-SAS Adapter - Dual SFF-8643 to SFF-8644 - with Full and Low-Profile Brackets - 12Gbps Adapter (USB socket on PS/2 plug) The portable unit is about

The portable unit is about the size of a credit card

this 4-port serial adapter card allows you to harness the full capability offered by PCI Express (PCIe)

the converter gives you flexible installation options - including a wall mounting option to save space

As a drive eraser

StarTech.com Mini-SAS Adapter - Dual SFF-8643 to SFF-8644 - with Full and Low-Profile Brackets - 12Gbps Adapter (USB socket on PS/2 plug) The portable unit is aboutThis Mini SAS adapter lets you convert two internal SFF 8643 ports on a controller card into two external SFF 8644 ports. This enables you to connect external SAS or SATA drives in devices such as a Direct Attached Storage (DAS) device to an internal backplane or SAS controller for additional storage. The adapter can connect up to eight drives in total and is compatible with 12Gbps SAS drives as well as 6Gbps SATA drives. For a hassle free