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SCSI
stands for "Small Computer System Interface" and is
pronounced "scuzzy". SCSI is a snazzy term for a simple
concept: it is the name for a connection from your PC to
your hard drive and your other peripherals. This connection is made
using a SCSI card, a card that fits inside your computer.
SCSI is Your Best Choice To:
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deliver the
performance power users want from their desktop or PC workstation |
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connect to
the fastest and highest-capacity hard drives and peripherals |
| SCSI
Delivers Performance |
| With today's
fast processors, sophisticated operating systems, demanding
applications and wide range of peripherals, SCSI is key to eliminating
the input/output (known as I/O) bottlenecks that occur in standard
PCs. Ultra Wide SCSI runs up to 40 Megabytes per second versus EIDE's
16.7 Megabytes per second. And Ultra2 Wide SCSI runs at an even faster
rate of up to 80 Megabytes per second versus Ultra DMA's 33 Megabytes
per second. Other key performance points to consider: |
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Windows NT®
has up to 3 times faster throughput with SCSI than EIDE |
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Photoshop is
22% faster with SCSI than EIDE* |
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Filemaker
Pro is 14% faster with SCSI than EIDE* |
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AutoCAD is
33% faster with SCSI than EIDE*
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| *When
benchmarking with comparable SCSI vs. EIDE drives. |
The
Benefits of SCSI
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Performance
- Supports up to 160 MByte/sec
transfer rates with Ultra160 SCSI
- Connects high-performance devices
such as hard disk drives, CD-Recorders, and other high-speed
peripherals to your PC
Connectivity
- Connectivity for internal and
external SCSI devices
- Single SCSI card can connect up
to 7 or 15 devices per channel
- Backward compatible with earlier
versions of SCSI
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The
Newest SCSI Features
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Features added with Ultra160 SCSI
- 160 MByte/sec performance
- Cyclic Redundancy Checking (CRC)
checks all transferred data, adding significantly to data
integrity
- Domain Validation intelligently
verifies system configuration and automatically sets reliable
transfer speeds
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The
Types of SCSI
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| SCSI
Type |
Speed |
SCSI
makes it easy to connect hot hard drives and cool peripherals |
| Ultra160
SCSI (16-bit Wide) |
160
MB/sec |
State-of-the-art
hard drives |
| Ultra2
SCSI (16-bit Wide) |
80
MB/sec |
Hard
drives |
| Ultra
Wide SCSI (16-bit Wide) |
40
MB/sec |
Hard
drives and tape drives |
| Ultra
SCSI (8-bit Narrow) |
20
MB/sec |
CD-R,
CD-RW, tape, removable storage (Jaz), and DVD drives |
| SCSI-2,
Fast SCSI (8-bit Narrow) |
10
MB/sec |
Scanners,
Zip drives, and CD-ROM |
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Server
Technology Comparison
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Embedded
UDMA |
Fibre
Channel |
SCSI |
Best
suited
for |
Low-end
server with limited expandability |
Server-to-server,
campus networks |
Low-
to high-end server if expandability is desired |
| Advantages |
- Performance: 66 MB/s
- No added cost (standard
on all motherboards)
- Industry-standard, basic
interface
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- Performance: 100 MB/s
- Hard drive reliability
- Highest hard disk drive
expandability
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- Performance: 160 MB/s
- High hard drive and
peripheral reliability
- Connectivity to the
largest variety of peripherals
- Expandability
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Single-User
Technology Comparison
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USB |
Embedded
UDMA |
SCSI |
Best
suited
for |
Basic
Desktop |
Basic
Desktop |
Performance
Desktop/Workstation |
| Advantages |
- No added cost*
- Easy, external
connectivity for simple devices like joysticks, keyboards,
mice, and entry-level scanners
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- No added cost*
- Industry-standard
interface
- For connecting internal
devices such as hard disk drives and CD-ROMs
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- Highest performance
- Highest device
reliability
- Connection to the largest
variety of peripherals
- Expandability
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* UDMA and USB
connections are standard on all new Windows® computer systems.
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