port multiplier


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port multiplier

Also called a "fan-out," it is a device that expands one physical socket/jack into several. For example, an eSATA port multiplier allows multiple external SATA drives to be connected to one eSATA port on the computer. Also called a "port expander," another example is a USB hub, which allows multiple USB devices to work with one USB port on the computer. See SATA and USB.
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When multiple drives are connected to the SiI 3132 via a port multiplier such as Silicon Image's SiI 3726, RAID 0, 1, 10 and 5 are supported.
In addition, eSATA enables external storage to utilize features and mechanisms such as Native Command Queuing, Hot Plug, Port Multipliers and many more advanced SATA features.
Port Multiplier enables 15 drives to be connected to a single SATA controller.
The test results below are achieved by using a Silicon Image 3Gb/s Port Multiplier and 2--4 Seagate Barracuda 7200.
When a port multiplier is added to a single SATA port, a single host port can access up to 15 drives.
The new SATA II specification addresses this rising demand with its new Port Multipliers (PMs).