SCSI DRIVES
>> Wednesday, February 15, 2012
The Small Computer Systems Interface (SCSI) pronounced as skuzzy, enables you to attach hardware peripherals to the system. The SCSI system consists of the SCSI controller, SCSI cable and SCSI devices. SCSI controller communicates with the system and is attached with the system. SCSI cables are used to connect the SCSI devices to the SCSI controller and the system. Example of SCSI devices are hard disks, tape drives, scanners etc.
Advantages of SCSI
SCSI drives provide many advantages over the IDE drives. SCSI enables fast communication between the system and the device. The SCSI interface connects many devices but requires only few slots on the motherboard.
The advantages of SCSI are:
> The SCSI devices have data transmission speeds that can reach about 320 MB per second between the system and device.
> It allows you to attach upto 15 devices to a single SCSI port.
> The SCSI controller boosts the signals and enables the devices to be connected at a distance of about 25 meters from the system.
> The SCSI devices reduce the processing load on the microprocessor, as they have a micro-controller built into the device.
> The communication problems between the system and SCSI device due to data signals reflecting back when cables are left open are reduced, as the ends of the SCSI have terminators.
Types of SCSI Interface and Standard
An interface is used to connect the various devices with the system. SCSI interfaces come in different forms. Each type of interface supports different bandwidth and operates in different speeds. The connector used by the various interfaces also differs.
The SCSI standards specify the features that a SCSI device manufacturer can include on the SCSI hardware. These standards specify the cable lenghth and the data transfer speed between the system and the device. There are three standards SCSI-1, SCSI-2, and SCSI-3.
Advantages of SCSI
SCSI drives provide many advantages over the IDE drives. SCSI enables fast communication between the system and the device. The SCSI interface connects many devices but requires only few slots on the motherboard.
The advantages of SCSI are:
> The SCSI devices have data transmission speeds that can reach about 320 MB per second between the system and device.
> It allows you to attach upto 15 devices to a single SCSI port.
> The SCSI controller boosts the signals and enables the devices to be connected at a distance of about 25 meters from the system.
> The SCSI devices reduce the processing load on the microprocessor, as they have a micro-controller built into the device.
> The communication problems between the system and SCSI device due to data signals reflecting back when cables are left open are reduced, as the ends of the SCSI have terminators.
Types of SCSI Interface and Standard
An interface is used to connect the various devices with the system. SCSI interfaces come in different forms. Each type of interface supports different bandwidth and operates in different speeds. The connector used by the various interfaces also differs.
The SCSI standards specify the features that a SCSI device manufacturer can include on the SCSI hardware. These standards specify the cable lenghth and the data transfer speed between the system and the device. There are three standards SCSI-1, SCSI-2, and SCSI-3.
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