Parallel ATA, also known as PATA, is a type of computer interface used for connecting storage devices such as hard drives and optical drives to the motherboard. The word "parallel" is spelled /ˈpærəlel/ in IPA phonetic transcription, with the stress on the first syllable. The word "ATA" stands for "Advanced Technology Attachment" and is spelled /ˌeɪtiːˈeɪ/ in IPA, with the stress on the second syllable. Together, "parallel ATA" is pronounced /ˈpærəlel ˌeɪtiːˈeɪ/.
Parallel ATA (Advanced Technology Attachment) is a conventional interface used to connect storage devices, primarily hard disk drives, to a computer system. It is an older technology that has been largely superseded by Serial ATA (SATA).
Parallel ATA operates using a parallel data transfer method, where multiple bits of data are transmitted simultaneously over separate physical lines. It utilizes a ribbon cable with multiple wires to connect the storage device to the motherboard or expansion card. The interface supports various communication protocols, including IDE (Integrated Drive Electronics) and ATAPI (Advanced Technology Attachment Packet Interface).
The Parallel ATA standard has gone through several revisions, with each version introducing new features and improvements. The most common types of parallel ATA include ATA-1, ATA-2, and ATA-3.
Parallel ATA has a maximum data transfer rate of 133 megabytes per second (MB/s), although older versions may have lower speeds. It supports up to two devices per channel, using master and slave configurations. Additionally, Parallel ATA cables tend to have limited length due to signal degradation issues, typically reaching up to 18 inches.
Although Parallel ATA has been surpassed by SATA in terms of speed and compatibility, it is still used in older computer systems or for specialized purposes such as industrial applications or legacy hardware support.
The term "Parallel ATA" (also known as PATA) is derived from the combination of three elements:
1. "Parallel" refers to the data transmission method used in this type of connectivity. It signifies that multiple data bits are transferred simultaneously through multiple wires or channels.
2. "ATA" stands for "AT Attachment". ATA is a protocol that defines the way in which a computer's hard disk and other storage devices are connected to the motherboard. The term "AT" initially stood for "Advanced Technology", as it was introduced with the IBM AT computer model in the 1980s.
Therefore, "Parallel ATA" describes the old standard of connecting storage devices to the motherboard using parallel data transmission, which was commonly used until the introduction of Serial ATA (SATA) technology.