Solved

USB in the near futur?

Posted on 1998-11-11
4
269 Views
Last Modified: 2010-04-27
Dear Experts

  I am about to make a major purchase decision concerning
USB hubs.I would like to know How important are
USB devices? Are they really fast?Can you really
hook about 100 device in a chain?Are the going to be
important in the near futur?Will they be more
common then SCSI devices in the near futur?

Do you have any reference on the web that talks
about that subject in particular?

Thank you
0
Comment
Question by:fadih
  • 2
  • 2
4 Comments
 
LVL 32

Expert Comment

by:jhance
ID: 1128849
Of course you're asking for an opinion about the future...

I think that USB is going to be significant and is going to replace both serial and parallel ports over time.  It will not replace SCSI as the performance is not even close.  Devices like modems, scanners, sound systems, printers, tape backup, removable drives, etc.  Basically anything that needs a low speed and low cost interface will eventually use USB.

0
 

Author Comment

by:fadih
ID: 1128850
Dear Jhance
How slow are usb devices comparing to scusi? and comparing to serial?

Could you give me some references on the web ,please?
0
 

Author Comment

by:fadih
ID: 1128851
Comparing to Serial and Pparalel port ,how faster is USB ?

Please give some reference on the web
0
 
LVL 32

Accepted Solution

by:
jhance earned 200 total points
ID: 1128852
The USB spec can be obtained from www.usb.org:

http://www.usb.org/usb/developers/index.html



Speeds from slowest to fastest (note that some are bits/sec, others are bytes/sec):

SERIAL: maximum speed of 115K bits/sec (some special boards go faster)
PARALLEL: max speed of about 500K-1M bytes/sec
ETHERNET: 10M bits/sec
USB: 12M bits/sec
Fast Ethernet: 100M bits/sec
UDMA (UltraDMA IDE) 33M bytes/sec
SCSI 5M-80M bytes/sec
0

Featured Post

6 Surprising Benefits of Threat Intelligence

All sorts of threat intelligence is available on the web. Intelligence you can learn from, and use to anticipate and prepare for future attacks.

Join & Write a Comment

Does your iMac really need a hardware upgrade? Will upgrading RAM speed-up your computer? If yes, then how can you proceed? Upgrading RAM in your iMac is not as simple as it may seem. This article will help you in getting and installing right RA…
In the modern office, employees tend to move around the workplace a lot more freely. Conferences, collaborative groups, flexible seating and working from home require a new level of mobility. Technology has not only changed the behavior and the expe…
Illustrator's Shape Builder tool will let you combine shapes visually and interactively. This video shows the Mac version, but the tool works the same way in Windows. To follow along with this video, you can draw your own shapes or download the file…
This tutorial demonstrates a quick way of adding group price to multiple Magento products.

758 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now