Usb | Macally PHR-100SU guide

Q3. How is SATA compared to USB and Firewire in speed? What per- formance gain can one expect by using SATA connection?

A3: Following chart shows the specification data rate(MBps) and Overhead among USB, Firewire and SATA.

Next table compares real world benchmark between USB, Firewire and SATA drives:

	USB	1394	Serial
Raw Interface	480Mbps	400Mbps	1500Mbps
speed	480Mbps	400Mbps	1500Mbps
speed
Benchmark	31.6MB/sec	34.8MB/sec	42.4MB/sec
comparison	31.6MB/sec	34.8MB/sec	42.4MB/sec
64K read
Benchmark	26.5MB/sec	26.7MB/sec	56.2MB/sec
comparison	26.5MB/sec	26.7MB/sec	56.2MB/sec
64K write
Burst	33.5MB/sec	36.2MB/sec	111.3MB/sec
Transfer	33.5MB/sec	36.2MB/sec	111.3MB/sec
Rate

Table: Comparison of interface speeds and data transfer rates external disk drive interfaces

Above data are quoted from www.sata-io.org. The performance of PHR- 100SU in your application might be higher or lower depending upon the hard drive used, SATA and USB host and computer hardware. In our test, we have seen over 60MB/s sequential read and write speed in SATA connec- tion. SATA is the better choice for storage device.