To sum up, for products supporting the optional SATA 3. All drives with this optional feature will not power up if a legacy SATA connector is used. The comments below, in the Tom's Hardware article, point out that it would have made much more sense to have the Power disable occur when the pin is driven low, rather than high- as this would completely avoid the problem proposed above.
Much of it is behind a paywall, unfortunately. Perhaps someone with this arcane answer can provide more info as to the thought process behind it. It would be in the 1. A closely related discussion , I have cross-posted as well- don't shoot me.
Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Why does the SATA power connector have so many pins? Ask Question. Asked 6 years, 8 months ago. SATA cables can be up to a meter 3. The primary difference between versions is data transfer speed.
Hot Swapping The ability to plug or unplug a device without powering down the computer is known as hot-swapping. SATA connectors and devices employ a two-step mating process to avoid arcing and power drops that might affect other loads.
The 4 and 12 ground pins on a SATA power connector are longer so they make contact first when mated. Similarly, SATA devices have longer 3, 7 and 13 power pins for the same reason. Hot-swapping is a feature of the SATA controller. Latching Connectors To ensure a solid connection and to avoid accidental disconnections, SATA cables will typical feature latching connectors.
Angled Connectors Space inside a computer case is often tight so angled connectors are an important consideration when choosing a cable. A right-angled connector feeds the cable down. The angle of the connector is also important when drives are installed vertically and side-by-side. My computer does not have an eSATA port on the back of the case.
How can I connect my external hard drive? Why does a SATA power connector have so many pins? Why the much greater pin count? What does M. The M. It is used to improve performance by concurrently reading or writing to multiple disks or to provide data redundancy by writing data to two or more drives.
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Tony Tony 41 1 1 gold badge 1 1 silver badge 3 3 bronze badges. Add a comment. Active Oldest Votes. The SATA standard defines data cable connector consisting of: 40 pins 34 pins 15 pins 7 pins I chose 15 pins. A SATA data cable has 7 pins. A SATA power cable has 15 pins. Data connector The SATA standard defines a data cable with seven conductors 3 grounds and 4 active data lines in two pairs and 8 mm wide wafer connectors on each end.
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