Narrow SCSI Vs Wide SCSI
Narrow SCSI Vs Wide SCSI
The Narrow SCSI and Wide SCSI are SCSI variations which determine the number of devices to be connected to the SCSI Port. Both Narrow SCSI and Wide SCSI are discussed in details below along with other SCSI variations.
The different variations of SCSI specify the number of devices that can be connected, the bus speed and the bus width at which the SCSI devices communicate with each other. The bus speed specifies the amount, of data that can be transferred in one second. This bus width is the amount of data that the cable can accommodate.
The Narrow SCSI transmits data over an 8-bit bus. This uses the 50-pin connector cable as the A cable. A cable is the standard 8-bit cables used with SCSI-1 and SCSI-2 device. If you use Narrow SCSI device you must ensure that the devices are set with SCSI ID less than 7.
The wide SCSI transmits data over a 16-bit bus. The Wide SCSI uses a 68-pin connector cable known as the P cable, to connect to devices. The P cable is a 16-bit Wide SCSI cable used to connect SCSI devices.
The Fast SCSI can transfer data at the speed 10 MB per second using the Narrow SCSI and 20 MB per second using the Wide SCSI.
Wide Ultra SCSI
THIS Ultra-wide SCSI transmits data at a speed of 20 Mbytes/sec for the Narrow SCSI. It enables you to use a maximum cable length of 1.5 meters. The Ultra-wide differential SCSI enables you to use a cable length of 25 meters.
SCSI Drive speeds
Hard drive capacities have increased many folds over the years. The speed of a hard drive is measured the speed in which the platters spin. Faster data retrieval depends on the speed of the hard drive. Faster the platter rotates, faster the data will be written and retrieved from the HARD drive. To maintain acceptable access times, there is an increase in the drive. SCSI drives are available at speeds of 10,000 rpm and also at 15,000 rpm.
Universal Hard Drive
Universal hard drives make it easier to upgrade the server hard drives. Hot swapping is supported by universal Hard drive. This feature allows you to replace the hard drives without switching off the power supply, it is based on the Ultra 320, Ultra 3, or Ultra 2 technology. Universal hard drives also supporting Self Monitoring Analysis and Reporting Technology (S.M.A.R.T.). This feature monitors the working of the hard drive and warns about any potential damage to the hard drive.
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