We help IT Professionals succeed at work.

Speed comparison on XP: SDHC Cards vs USB vs Hard Drive

3,623 Views
Last Modified: 2013-11-14
I am thinking to install XP on removable drive. Can anyone tell me what's the speed comparison among these? SDHC Cards vs USB vs Hard Drive.

And what's the impact will I encouter if I install Xp on the removable drive? Thank you.
Comment
Watch Question

Commented:
You will always see better performance on an internal HDD or fiber array, but installing to a USB drive can be done.  The obvious effect will be that it is 'painfully' slow - I have a USB with XP loaded in case I ever need to use it, but would never attempt to use due to performance.

The current SD 2.0 specification can, theroretically, achieve 150x speed (22.5 MB/s).  Compare that with USB 2.0 performance of 60 MB/s and a SATA 3 speed of 300 MB/s.  IF you are going to install on an external drive, USB will provide much better performance that SDHC.
Retired
CERTIFIED EXPERT
Most Valuable Expert 2013
Top Expert 2009
Commented:
This one is on us!
(Get your first solution completely free - no credit card required)
UNLOCK SOLUTION
Gary CaseRetired
CERTIFIED EXPERT
Most Valuable Expert 2013
Top Expert 2009

Commented:
... here's an example of an external SSD setup you could use:

Drive:  http://www.newegg.com/Product/Product.aspx?Item=N82E16820609270

Case:  http://www.newegg.com/Product/Product.aspx?Item=N82E16817145137

Note that there are less expensive SSD's => but they typically have much lower performance.   The one above has 60MB/s read speeds, and 45MB/s write speeds ... clearly enough to saturate the USB 2.0 bus (taking full advantage of it) ... and very competitive with "real" hard drives (faster, in fact, than most laptop drives).

Author

Commented:
Hi garycase, you said SDHC cards can achieve speeds in the 20MB/s range. But I checked the link here http://www.sdcard.com/usa/TextPage.asp?Page=3.

The fastest speed is only 6 MB/s.
Gary CaseRetired
CERTIFIED EXPERT
Most Valuable Expert 2013
Top Expert 2009

Commented:
That link shows the "type" ratings -- what speed you must achieve to be rated as a specific "type" card.   It doesn't limit the speed of the cards ... which get a bit faster with each generation.

Here are a couple of the fastest current cards - both rated at 20MB/s or faster:  

SanDisk:  http://www.flash-memory-store.com/4gb-sandisk-extreme-iii-sdhc-memory-card.html

Qmemory (with SamSung chips):  http://www.flash-memory-store.com/qmemory-secure-digital-16gb.html





Gain unlimited access to on-demand training courses with an Experts Exchange subscription.

Get Access
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Empower Your Career
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Unlock the solution to this question.
Join our community and discover your potential

Experts Exchange is the only place where you can interact directly with leading experts in the technology field. Become a member today and access the collective knowledge of thousands of technology experts.

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.