In UltraATA-100, the number refers to the MHz speed of the interface to
the hard drive. Your hard drive and controller both need to support the
higher speed to benefit from it. Special cables need to be used as well.
The old ATA (also known as IDE) interface was 33 MHz.

SCSI (Small Computer Systems Interface) is a more advanced parallel
interface for adding devices to a computer. Scanners and CD-ROMs were
originally mostly SCSI devices. There are advantages to using SCSI for
hard disks, but the cost is about twice that of an IDE drive and the
performance improvement may not be there unless it is for a server. SCSI
(pronounced scuzee) comes in many varieties. There is SCSI, Fast SCSI,
Ultra SCSI, Wide SCSI, Ultra Wide SCSI, SCSI 2, and SCSI 3. The drive
has to match the controller, although most controllers handle several
versions of the interface.

Hope this is of some help.

Peter
____________________________________________________________
Peter Shkabara - Computer Science Instructor
Columbia College - 11600 Columbia College Drive - Sonora, CA 95370
(209) 588-5156 - [log in to unmask] - http://gocolumbia.org/pesh


-----Original Message-----
Could someone please explain the advantage of RAID? In addition to a
UltraATA-100 or new Ultra-133? SCSI? What are the advantage for a home
unit? A business workstation? A business file server? Articles regarding
this subject?
Richard Bolha

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