Serial ata

Serial ATA was introduced in As its name suggests, serial ata, a Serial ATA drive transfers data in serial fashion. Data is moved one bit at a time between a SATA drive and its host, using a seven-pin data cable and pin power cable.

SATA Serial AT Attachment [a] [2] is a computer bus interface that connects host bus adapters to mass storage devices such as hard disk drives , optical drives , and solid-state drives. Revision 1. The SATA-IO group collaboratively creates, reviews, ratifies, and publishes the interoperability specifications, the test cases and plugfests. SATA host adapters and devices communicate via a high-speed serial cable over two pairs of conductors. In contrast, parallel ATA the redesignation for the legacy ATA specifications uses a bit wide data bus with many additional support and control signals, all operating at a much lower frequency. The Serial ATA spec requires SATA devices be capable of hot plugging ; that is, devices that meet the specification are capable of insertion or removal of a device into or from a backplane connector combined signal and power that has power on.

Serial ata

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As its name suggests, a Serial ATA drive transfers data in serial fashion.

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Serial ata

In spite of its success, and continued use, the PATA interface has a long history of design issues. For a long time these issues were handled more or less successfully. Some, though, persisted and over time became more inhibitive to progress, particularly with signal noise at higher bandwidths. As hard drive and optical disk technology advanced, this limit presented an unworkable bottleneck for the ever increasing demands of computer systems. The PATA interface also depends on 5V signaling lines, incompatible with many microprocessors beyond the turn of the millennium. Unfortunately it took some time for these alternatives to offer the combination of low cost to relative performance that was the key to the success of the traditional PATA interface. They were also completely new interfaces, offering no direct backward compatibility for existing devices. SATA was conceived as the answer. The standard for SATA, when compared with PATA, offers lower signaling voltages and reduced pin count, is faster and more robust, and has a much smaller cable.

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Archived from the original PDF on 13 June Other special symbols communicate flow control information produced and consumed in the higher layers link and transport. This heavier protocol could sometimes lead to significant performance losses in the case of low loads no or very little command reorganization to do and has been integrated in a limited number of controllers. Archived from the original PDF on October 9, See also: Port multiplier. USB 2. WCCF Tech. The same procedure is performed when data is received, but in reverse order. Some SATA drives, in particular mechanical ones, come with an extra 4 or more pin interface which isn't uniformly standardized but nevertheless serves similar purpose defined by each drive manufacturer. Tools Tools. Examples of such provisions include:. This section needs expansion. In those cases SATA drives do not have low-level features accessible. SATA uses a point-to-point architecture.

Serial ATA was introduced in

Most devices that are only SATA 1. Thus, SATA connectors and cables are easier to fit in closed spaces and reduce obstructions to air cooling. Optional [1]. Wikimedia Commons. Each packet contains a header identifying its type , and payload whose contents are dependent on the type. This heavier protocol could sometimes lead to significant performance losses in the case of low loads no or very little command reorganization to do and has been integrated in a limited number of controllers. Spotlight: Delkin Customer Engineering Success. Thus, SATA connectors and cables are easier to fit in closed spaces and reduce obstructions to air flow cooling. However, most drives do not use the 3. Electronic Design. The link layer signals to the transport layer that there is incoming data available.