SCSI hard drives standard

In 1986, the standard ATA and SCSI standard has been in the same year. There have been improvements in the SCSI standard, especially in critical areas such as bus speed, speed, number of devices that can be attached and the speed of the tire. SCSI (Small Computer System Interface) is Scuzzy. Small Computer Systems Interface SATA (Serial ATA) and ATA (Advanced Technology attachments) can be used for other purposes, and not only in conjunction with labor groups, as the connection of other peripherals such as printers, scanners, printers, optical drives and tape drives.

Host adapters for SCSI hard disk drive can be connected to the motherboard. In addition to the processing center a gateway for data transfer. When the weight data are processed, resources continue to be exempt from-SCSI controller. Most of the work is different from the hard disk controller. Each SCSI hard disk, it is not necessary for the performance of the processor and, therefore, direct communication. In addition, ATA and SATA hard drives based on the transformation of the communications system. SCSI adapter has the ability to support up to fifteen hard drives and other devices.

There are a number of physical connections, hard drives to connect to the system. Blocks also PIN-code is the title of communication, and in the latest desktop motherboards. Do you support the plug SATA (7-pin), and / or connector ATA (40 PINS). Built in adapter in the high-end motherboards because of the characteristics of SCSI. The number of PIN-header can 80, 68, 50 or 25, depending on the type and age. SCSI adapter (independent) available slots for PCI-X and PCI (Peripheral Component Interconnect). Can be chosen to ensure the discs on hand.

Cable for SCSI drives different, and not the number of contacts needed for communication, but also because the number of disks in the channel. Most hard disks can be added to the chain channel SCSI cables together. At the end of the line, the device must be installed so that the channel may be at the end of the line. Terminator is used for this purpose. This cable has a terminator is removable. Three ports are located in the cable, Ultra SCSI-160 drives. Each plate was switch or jumper to enable the system to identify all devices on the small computer system interface bus.

SCSI ID, or one value for each disc. The significance of using the jumpers. SCSI-ID in the system, which is capable of sixteen devices that support in a range from zero and fifteen. SCSI-1 is a standard parallel interface. SCSI-1, 5 MB / s transfer rate of 5 MHz, 8-bit bus width. This channel 1 controller can store up to eight devices. SCSI Ultra-320 is a parallel interface. SCSI Ultra-320 supports 320 MB / s transfer rate 40 MHz, 16-bit bus. Sixteen devices can be connected to the channel. These devices are in Rule 15 of the disc, and 1 adapter. ATA 133 is a standard parallel interface. Supports up to 133MB / with the speed of data transmission speed of 33 MHz, 16-bit bus. The channel can have two ATA 133 devices.