![]() ![]() The SATA cable results in a higher signaling rate, which corresponds to faster data throughput. SATA transfers data one bit at a time between a drive and its host, using a seven-pin data cable and 15-pin drive power connector cable. SATA drives contain an independent computer host bus to eliminate resource contention. Capping each end of the SATA conductors is an 8-millimeter wafer connector. One pair of wires transfers data and one pair receives data. The SATA standard defines a SATA cable with two pairs of differential wires, three ground pins and a separate power connector. PATA drives deliver data bits simultaneously across a single ribbon cable that's 40-pin wide. This contrasts with SATA's full-duplex performance. Most notably, PATA is a half-duplex transmission, making it unable to simultaneously receive and transmit data. ![]() SATA offers several advantages compared with the IDE-based PATA standard developed in the 1980s. The multiple wires that parallelism needs also makes it slightly more costly than serial transmission. As a result, parallel transmission is better suited to shorter distances to avoid signal interference. A clocking signal synchronizes the timing between the different channels. Multiple bits are sent simultaneously across different wires that are housed in the same cable. This makes serial signals suitable for transmitting data over long distances.Ī parallel signal is synchronous and requires a wider data bus. When comparing SATA and PATA, a serial connection requires fewer wires and results in a clearer signal than a parallel connection. It would require significant engineering to support bandwidth higher than the current top end rate of 6 Gbps, the group said. SATA-IO said it has no plans for SATA 4.0 interoperability. This change promoted greater integration and interoperability with PCIe flash and other I/O protocols. This revision addressed the use of shingled magnetic recording It supports the simultaneous use of SATA ports and PCI Express ( PCIe) lanes. This update added the SATA Express specification. This intermediate revision added final design requirements for SATA Universal Storage Module for consumer-based portable storage applications. Revision 3 drives are backward-compatible with SATA Revision 1 and Revision 2 devices, though with lower transfer speeds. ![]() These interfaces supported drive transfer rates up to 6 Gbps. These devices doubled the transfer speed to 3.2 Gbps with the inclusion of port multipliers, port selectors and improved queue depth. SATA Revision 1 devices reached a top transfer rate of 1.5 Gbps. These devices were widely used in personal desktop and office computers, configured from PATA drives daisy chained together in a primary/secondary configuration. These revisions include the following changes: The consortium revises SATA standards to reflect increased data transfer rates. The nonprofit SATA-IO industry consortium authors the technical specifications governing Serial ATA device interfaces. ![]() SATA transfers individual bits of data in serial fashion. The SATA protocol replaced the Parallel ATA standard that required a parallel connection. SATA cables are thinner, more flexible and less massive than the ribbon cables required for conventional PATA hard drives. SATA is a serial version of the Integrated Drive Electronics ( IDE) specification for PATA hard drives that use parallel signaling. Those systems also usually support serial-attached SCSI ( SAS) and non-volatile memory express ( NVMe) communication protocols. It succeeded Parallel ATA ( PATA) as the communications interface for most new computer systems. SATA specifies a transfer format and a wiring arrangement. The Serial ATA International Organization (SATA-IO) oversees the development of the technical specification. SATA refers to the communication protocol itself and the industry standards adhered to by the OEMs that produce SATA-compatible cables, connectors and drives. As its name implies, SATA is based on serial signaling technology, where data is transferred as a sequence of individual bits. Serial ATA (Serial Advanced Technology Attachment or SATA) is a command and transport protocol that defines how data is transferred between a computer's motherboard and mass storage devices, such as hard disk drives ( HDDs), optical drives and solid-state drives (SSDs). ![]()
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