How many types of laptop optical drive interfaces are there?

Laptop optical drive interfaces include: 1. ATA/ATAPI interface; 2. USB interface; 3. IEEE1394 interface, also known as FireWire interface, which is a serial standard developed by Apple; 4. SCSI interface, small computer system Interface is a relatively special interface bus.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

The interface of an optical storage drive is the physical link between the drive and the system host. It is the data transmission path from the drive to the computer. Different interfaces also determine the data transmission speed between the drive and the system.

Optical drive interface type:

1, ATA/ATAPI interface

ATA/ATAPI (AT Attachment/AT Attachment Packet Interface, AT embedded interface /AT Additional Packet Interface) is an extension of the parallel ATA interface in the computer. ATA is also known as IDE interface, ATAPI is the industry standard ATA interface for CD/DVD and other drives. ATAPI is a software interface that adapts SCSI/ASPI commands to the ATA interface. This makes it easier for optical drive manufacturers to adapt their high-end CD/DVD drive products to the ATA interface.

The ATA/ATAPI interface driver is also customarily called the enhanced IDE (EIDE) interface driver, which is an extension of the IDE interface. The IDE interface is the most cost-effective optical storage product and the most widely used optical storage interface in the market. The vast majority of optical drives are connected to the host through the ATA/ATAPI interface.

2. USB interface

The full name of USB is Universal Serial Bus, which can connect up to 127 peripherals. Since USB supports hot-swap and plug-and-play advantages, the USB interface has Becomes the standard interface for scanners. USB has two specifications, USB1.1 and USB2.0. USB1.1 is the more common USB specification at present. Its transmission rate in high-speed mode is 12Mbps and its transmission rate in low-speed mode is 1.5Mbps. Note: b here means Bit, 1MB/s (megabytes/second) = 8MBPS (megabits/second), 12Mbps = 1.5MB/s. At present, low-end scanners for home use are mainly USB interface types. The USB2.0 specification evolved from the USB1.1 specification. Its transmission rate reaches 480Mbps, which is 60MB/s converted into MB, which is enough to meet the rate requirements of most peripherals. The Enhanced Host Controller Interface (EHCI) in USB 2.0 defines an architecture that is compatible with USB 1.1. It can drive USB 1.1 devices with USB 2.0 drivers. In other words, all devices that support USB 1.1 can be used directly on the USB 2.0 interface without worrying about compatibility issues, and accessories such as USB cables, plugs, etc. can also be used directly.

Nowadays, all hosts have USB interfaces, so USB optical storage applications are extremely convenient. As an interface for external optical storage devices, the application is quite flexible, and there is no need to add additional equipment to the interface, reducing investment.

3. IEEE1394 interface

The IEEE1394 interface is a serial standard developed by Apple, and its Chinese translation is Firewire. Like USB, IEEE1394 also supports hot-plugging of peripherals, which can provide power for peripherals, eliminating the need for the peripherals' own power supply. It can connect multiple different devices and support synchronous data transmission.

IEEE1394 is divided into two transmission modes: Backplane mode and Cable mode. The minimum rate of Backplane mode is also higher than the maximum rate of USB1.1, which are 12.5 Mbps/s, 25 Mbps/s, and 50 Mbps/s respectively, and can be used for most high-bandwidth applications. Cable mode is a very fast mode, divided into 100 Mbps/s, 200 Mbps/s and 400 Mbps/s. At 200Mbps/s, high-quality data movies without compression can be transmitted.

1394b is an upgraded version of 1394 technology. It is the only home network standard specifically designed for multimedia-video, audio, control and computers. It enables high-performance home networking over low-cost, secure CAT5 (Category Five). 1394a has been available since 1995, and 1394b is a backward-compatible extension of 1394a technology. 1394b can provide transmission speeds of 800 Mbps/s or higher. Although there are no optical storage products with 1394b interface on the market yet, I believe they will appear in front of users in the near future.

Compared with the USB interface, in the early USB1.1 era, the 1394a interface had a great advantage in speed. After the launch of USB2.0, the speed advantage of the 1394a interface is no longer so obvious. At the same time, most mainstream computers are not equipped with a 1394 interface. To use it, you must purchase the relevant interface card, which adds additional expenses. At present, there are very few external optical storage devices with a simple 1394 interface. Most of them are multi-interface products with both 1394 and USB interfaces, which are more flexible and convenient to use.

4. SCSI interface

SCSI - small computer system interface is a relatively special interface bus capable of communicating with various types of peripherals. SCSI uses the standard software interface of ASPI (Advanced SCSI Programming Interface) to enable the drive to communicate with the SCSI adapter installed inside the computer. The SCSI interface is a high-speed data transmission technology widely used on minicomputers. The SCSI interface has the advantages of wide application range, multi-tasking, large bandwidth, low CPU usage, and hot plugging.

The SCSI interface provides a powerful and flexible connection method for optical storage products, and also provides high performance, which can be 7 or more expensive. SCSI interface optical drives need to be used with expensive SCSI cards, and SCSI interface optical drives are more troublesome to install and set up, so SCSI interface optical drives are far less widely used than IDE interface optical drives. Optical storage products with SCSI interface are mostly used in professional fields with special needs, and almost no household products use this type of interface.

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