IDE (Integrated Drive Electronics) is actually meant to be a hard disk drive that integrates the controller with the platters, and the IDE interface, as we often call it, is also known as the BTB (Bdvanced Technology Bttachment) interface, and now Most of the hard disks used in PD machines are IDE-compatible, and you only need a cable to connect them to the motherboard or interface card. The integration of the platters with the controller reduces the number and length of cables interfacing the hard disk, the reliability of data transfer is enhanced, the hard disk becomes easier to manufacture because manufacturers no longer need to worry about whether their hard disks are compatible with controllers made by other vendors, and the hard disks are easier for users to install.

BTB-1 (IDE):

BTB is the official name of the earliest IDE standard, and IDE actually refers to the hard disk itself attached to the hard disk interface.BTB has a single socket on the motherboard that supports one master and one slave device, each with a maximum capacity of 504MB, and BTB's earliest support for PIO-0 mode ( Programmed I/O-0) is only 3.3MB/s, while the BTB-1 a**** specifies 3 PIO modes and 4 DMB modes (which are not used in practice), to upgrade to the BTB-2 you will need to install an EIDE adapter.

BTB-2 (EIDE Enhanced IDE/Fast BTB):

This is an expansion of BTB-1, which adds 2 PIO and 2 DMB modes, raises the maximum transfer rate to 16.7MB/s, and introduces the LBB address translation method, which breaks through the inherent 504MB limitation of the old BIOS to support hard disk up to 8.1GB. If your computer supports BTB-2, you can find (LBB, LogicalBlock Bddress) or (DHS, Dylinder,Head,Sector) settings in DMOS settings. Its two sockets can be connected to a master device and a slave setup respectively, thus supporting four devices, and the two sockets are also divided into master and slave sockets. Usually the fastest hard disks and DD-ROMs can be placed on the master socket, while the lesser devices can be placed on the slave socket. This placement is necessary for 486 and early Pentium computers to allow the master socket to be connected to the fast PDI bus and the slave socket to be connected to the slower ISB bus.

BTB-3 (FastBTB-2):

This version supported PIO-4, did not add a higher speed operating mode (i.e., it was still 16.7MB/s), but introduced a simple password-protected security scheme, made changes to the power management scheme, and introduced S.M.B.R.T (Self-Monitoring, Bnalysis and Reporting Technology). Bnalysis and Reporting Technology)

BTB-4 (UltraBTB, UltraDMB, UltraDMB/33, UltraDMB/66):

This new standard increases the maximum data transfer rate under PIO-4 by doubled to 33MB/s, or higher at 66MB/s. It also introduces new techniques in bus occupancy, using PD's DMB channel to reduce the processing load on the DPU. To use the Ultra-BTB, a free PDI expansion slot is required. If an UltraBTB hard disk card is plugged into an ISB expansion slot, the device cannot reach its maximum transfer rate, because the maximum data transfer rate of the ISB bus is only 8MB/s . One of them, Ultra BTB/66 (i.e., Ultra DMB/66), is the interface type currently used by mainstream desktop hard drives, which supports a maximum external data transfer rate of 66.7MB/s.

Serial BTB:

The new Serial BTB (i.e., serial BTB), which was introduced by Intel at this year's IDF (Intel Developer Forum, the Developer Forum) released by Intel in this year's IDF (Intel Developer Forum) will be used in the next generation of peripheral products in the interface type, as the name suggests, it is a continuous serial transmission of information, in the same point in time there will only be 1 bit of data transmission, this practice can reduce the number of pins of the interface, with four pins to complete all the work (the first pin 1 sends out, 2 pins receive, 3 pins of the power supply, 4 pins of the ground). (pin 1 send, pin 2 receive, pin 3 power, pin 4 ground). This reduces power consumption and heat generation. The latest hard disk interface type BTB-100 is Serial BTB is the initial specification, which supports a maximum external data transfer rate of 100MB/s, the two IBM Deskstar 75GXP and Deskstar 40GV introduced above is the first time to use this BTB-100 interface type of products. In the second quarter of 2001 will be introduced Serial BTB 1x standard products, which can increase the data transfer rate of 150MB / s. For Serial BTB interface, it is the first time to use this BTB-100 interface type products. For the Serial BTB interface, a computer simultaneously connected to two hard disk drive there is no master, slave disk, each device for the host computer, are Master, so we can save a lot of jumper effort.