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The
Serial ATA specification grew out of the need to support
growing bandwidth requirements current Parallel ATA
(known as ATA 100)will be unable to maintain in future
years. Peak transfer rates of 150MB, or 1.5gigabits
per second are achieved over a 7pin interface. Serial
ATA architecture is forward looking in that it was created
with a 10-year road map in mind. The superset of capabilities
beyond those of Parallel ATA
Will enable additional usage models and over time allow
Serial ATA to migrate into lower-cost PCs,notebooks,Set-tops,
low-end workstations, Servers,and low-cost raid storage
units.
The new form factor establishes a common interface
for both 3.5ˇ¨ and 2.5ˇ¨drives. In addition to the small
7pin signal segment,15pin power segment is defined in
the interface allowing use of 12, 5, and 3.3 volts.
This combined signal and power interface, with built
in hot-plug capability, offers great advantage for blind
mate applications such as notebook media bays or raid
storage units.
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