USB is developed by Compaq, DEC, IBM, Intel, Microsoft, NEC and Northern Telecom. The design objective of USB is flexibility and convenience over performance. Because USB is a serial bus, high performance devices such as CD recorders and hard drives should have a dedicated internal connection. Many new computers available today are equipped with USB connections on their motherboards. We will be installing a EIDE hard drive.
Internal drives are less expensive than external drives.
Drives must be set in an order so that the machine knows which drive to find the boot partition. A SCSI hard drive with ists supporting host adaptor and cable costs more than an EIDE hard drive with its supporting adaptor card. A SCSI subsystem provides faster data transfer than an EIDE drive, although a SCSI bus is the source of the performance rather than the hard drive technology. Gthe CPU must wait until the ISA bus and EIDE drive have completed the request before it can tackle another task. A good SCSI host adapter allows you to connect other devices to it, such as printer, scanner or tape drive.