EIDE : Computer Hardware Buyers’ Glossary

by Roedy Green ©1997-2008 Canadian Mind Products
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EIDE: Enhanced Integrated Drive Electronics. The most common method for attaching hard disks and CD-ROMs to the computer. The alternative is SCSI. SCSI is more expensive, but is no faster if you use Windows-95. SCSI is faster if you use OS/2 or NT. EIDE uses ribbon cables with 40 conductors. You can’t connect a SCSI drive to an EIDE controller or vice versa. Most modern PCs have two EIDE adapters. Each one can handle two devices, one designated as the master and the other the slave. You must configure jumpers on the devices to select standalone master, master with slave or slave. There are problems with some EIDE controllers. Controllers and devices are speed rated: ATA 100 = 100 megabytes per second transfer rate, ATA 66 = 66 MB/sec, ULTRASYNC 33 = 33 MB/sec. The higher the number, the better.
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hard disk

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