Re: Different Wireless speeds on 2 hard drives

nick1213x <nick1213x.2y4hv7@no-mx.wirelessforums.org> hath wroth:

>I have two hard drives in my computer, both with windows xp sp2

Any particular brand and model numbers?

>On my first hard drive, when i run a speed test,

Any particular speed test that you're running? If run from the
command line, any particular incantation, options, flags, or
proceedure?

>i get results of about
>16 Mbps, but when i run the same speed test on the other one i only get
>about 8 Mbps

Have you tried running a speed test from one hard disk to the other?
Do it both ways. I've gotten some really ugly preformance issues when
I'm running IDE drives as master and slave. Some drives just doesn't
like playing slave to a different brand of drive controller.

>I have wireless and when wired i get about 26 Mbps on another machine,

Any particular wireless device(s)? Router and client hadware would be
nice. Extra credit for the hardware version and firmware.

Got a description for this "other" machine?

If you're running ethernet between two machines, and you have an
ethernet switch (not a hub) in between the two machines, you should
get about 80-90Mbits/sec thruput between machines at 100baseT-FDX.
Since you're not even getting close to that, something else is screwed
up here. My guess(tm) is your machine has either something running in
the background (i.e. automatic backup program, file indexer, goofy
anti-crash utilities) or is infected with spyware, worms, or badly
written software. See:
<http://www.microsoft.com/technet/sysinternals/utilities/processexplorer.mspx>

>which i guess is normal because I am using wireless.

Could I trouble you to decide if you're using wired (where you claim
you are getting 26Mbits/sec thruput) or whether you are using wireless
and are getting something else? Some numbers would really be useful.
What *NUMBERS* are you getting for the various download speeds.

>But I do not know
>why there is a difference in speeds between my two hard drives.

If you supply the maker and model numbers for the drives, it might be
possible to deduce the problem from the specifications, assuming they
are working correctly.

>The
>wireless card drivers are the same and i can think of no difference that
>would make the speed faster on the first hard drive.

I usually can, but my crystal ball and Ouija board are temporarily out
of service.

>My card is a D-Link WDA 2320 and my router is a Linksys WRT54GS. My
>ISP is Comcast.

Ummm, are you running a download test from the ISP via the internet?
If so, you are measuring the Comcast speed, not the speed of your
wireless. The differences in timing might be nothing more than
coincidence or that the Comcrash system has become busy. Also, if
you're getting 26Mbits/sec via Comcast, you must have some kind of
truely impressive service. Also, depending on hardware version, the
typical WRT54GS will max out at about 20Mbits/sec. See list at:
<http://www.smallnetbuilder.com/component/option,com_chart/Itemid,189/>

Try using Iperf, without Comcast, instead:
<http://dast.nlanr.net/Projects/Iperf/>
You'll need two machines, one to act as a server. Do the initial
testing without wireless using CAT5 ethernet. You should get
80-90Mbits/sec this way. If not, something is really wrong with the
computers (not the wireless) and you should do troubleshooting.

On the server computer, run:
iperf -s
On the test client computer, run:
iperf -c 192.168.1.xxx
where the IP address is the IP address of the server machine. There
are plenty of other fun options, but start with the basic TCP test.

>Any help or insight would be great, thanks in advance!

Numbers are very helpful. More numbers are even better.


--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558