Comments for How do I maximize data transfer speed on my LAN?

Comment from Andy on 2011-08-28

2011-08-29T00:11:19Z

I am having issues with my network. Comp A Comp B and Server. If I transfer from A - B I get about 60MBps If I transfer from Server - A I get about 50MBps. If I transfer A - Server It starts out real high then it freezes and drops down to about 10MBps.. The file is one big ISO. Obviously I am on gigabit network. The Computer is decent 3.0 Dual core 4gigs of memory. The HD is 7200rpm Cache I can not remember off the top of my head. Do you have any suggestions to help me improve my transfer rate

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Comment from Samson on 2010-11-04

2010-11-04T07:47:53Z

hi i want to tell you that i am a student in ethio-china and there is a small LAN for only 23 students in our classroom but i could see that there is a different speed (bandwidth) b/n each of our computer and i asked my friends why but they refused to tell me the secret how to make it speedy. we all are on the same netwok how could it be like this please if there is a method you know dont wait to answer me thanks.

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Comment from Ashish Shroff on 2010-08-02

2010-08-02T18:22:42Z

I am currently on a 10/100 MBPS lan network, were one of my PC (an i7 machine with 8gb ram) is viewed by 100 other PCs (all C2D with 2gb ram) with the help of R-admin viewer...
Should I shift to gigabyte networking?
Please advice

Regards,

Ashish

The number of connections isn't a determining factor - the amount of data being transferred is. If you don't perceive a speed issue, I'd be tempted to leave well enough alone.

03-Aug-2010

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Comment from Simon on 2010-03-17

2010-03-17T09:29:35Z

need to check your spellings :p
spell check didnt work for this :-

Ultimately we're talking about reducing amount of time it takes to push bits from point
at to point b. More often than not that means machine A and machine B.

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Comment from satadal roy on 2010-02-18

2010-02-19T06:05:34Z

I READ THE ARTICLE THOROUGHLY, BUT NOT SATISFIED AS MY PROBLEM IS DIFFERENT.RECENTLY I SHIFTED MY NETWORK WITH GIGA SWITCH & gaga lan cards & cat6 cable to all my pcs, but the data transfer speed is even reduced to 10mbps, not getting why it is so?

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Comment from Patrick on 2010-02-06

2010-02-06T19:17:20Z

Leo,

Since you've been on vacation since June 2009 and are not accepting email, I have to post here.

I was happily reading a Google found article when an Awebber opt-in form appeared. I did the unthinkable: I opted in. I was then asked to confirm the subscription, in the process losing the article I was happily starting to read. I opted in. This led to yet another redirect. In the course of all this I lost the original article. Thank god I remembered a few words I read; I was able to search for it for 10 minutes on your Google specialized search tool, and find it.

What a nightmare.

Of course, I should know better than to opt in to javascript popups.

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Comment from Dave Rothery on 2009-11-13

2009-11-13T12:18:04Z

Only by improving the hard drive system can you see much much greater data transfer rates, using raid 5 arrays, or even high performing solid state drives. On the network you can team network cards on servers to improve throughput, but this will only benefit already cached data.

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Comment from Bill on 2009-04-30

2009-04-30T16:39:33Z

Something else that can really speed up yoru transfer speeds is to enable jumbo frames on a gigabit network. Just make sure your routers and switches support it

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Comment from Sam on 2009-02-10

2009-02-10T19:35:05Z

alex, no, sata hard drives have better BURST rates, up to 3gb/s but that isn't how fast the drives read, its the physically spinning disks that limit the hdd transfer rates so an upgrade to sata doesn't inherently mean a massive increase in any file reading or writing.

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Comment from PANKAJA K on 2008-12-17

2008-12-17T10:52:12Z

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Comment from Alex on 2008-11-05

2008-11-05T16:43:19Z

With he speed of SATA drives and the GB network, does the FSB speed (400, 800, 1333, 1600...) may also be a bottleneck?

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Comment from Robert Marshall on 2008-04-04

2008-04-05T00:28:07Z

Relief!! ~2x is the best we are achieving after upgrading all to 1Gb.
The rate from an internal (4+GB)to an internal was twice the rate of xfr from the internal to an external on another machine (USB connected HD).
Best rate was 10.17MB/s at 1Gb
We thought we had major problems. Thanks for the writeup. Intel was no help except for driver upgrades.

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Comment from Leo A. Notenboom on 2007-06-30

2007-06-30T19:46:01Z

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Exactly. NUL is just a special filename, so:

copy filename NUL

Reads the entire file and copies it to ... NUL.

Same idea as CON (screen and keyboard), LPT1, COM1 and so on.

Leo
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (MingW32)

iD8DBQFGhrLbCMEe9B/8oqERAvSMAJ9RPyQHgIkqG1NuxzzJajMAft4NlwCfSkBU
MaN3rBK3JWmPBTJdeS/WeiY=
=zAam
-----END PGP SIGNATURE-----

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Comment from Michael Horowitz on 2007-06-29

2007-06-30T03:24:03Z

Good hunch. :-)
How do you copy a file to NUL?
I assume with a DOS command...

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Comment from Leo A. Notenboom on 2007-06-23

2007-06-24T00:18:22Z

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Hash: SHA1

I started with a machine-to-machine copy, and was disappointed. :-)

So, on a hunch, I did a drive-to-drive copy on the same machine (happens to
have two drives) and the number was VERY similar.

Then I did a copy to NUL, (i.e. just a read of the entire file) and once again
the numbers were very similar.

If I recall right, I was using a CD image of around 650 megabytes.

Thanks,

Leo

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=azwJ
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Comment from Michael Horowitz on 2007-06-22

2007-06-23T04:12:50Z

Leo: Interesting that hard disk transfer speed turned out to be the weakest link in your networking chain. How did you figure this out?

Just for the record, different parts of the hard disk transfer data at different speeds. Not that it matters though, I can't imagine how anyone could force the placement of files to a specific section of the platters.

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Comment from Dave B on 2007-06-19

2007-06-20T03:18:22Z

Leo's the man! I nominate Leo for the Nerd Hall of Fame.

A couple of quick other bits of potentially useful data:

First, just about *any* Internet connection will be slower than your internal business network and should have very little impact on a switched system. I know that the Internet wasn't included in the original question, but sharing the Internet connection seems to come up often in small network questions.

Second, if you have a wireless connection into your network, don't expect the wireless connection to operate as quickly as the wired machines. I bet Leo could dedicate a whole article to getting decent speed from wireless networking. Wireless wasn't mentioned in the original question either - but it tends to come up in small network questions too.

I have to agree with Leo about network speed. This year I upgraded my home network to gigabit and rarely see much difference from the 100 megabit switched. The other day I hit a series of files from two different machines (copying from the server to two different machines) and the *second* copy of 111 files was amazingly fast... it was sitting in the cache of the server, so there weren't any hard drive bottle necks.

Recently I moved locations at work - the original location was running at 10mbps half-duplex - the new location is running at 100mbps full-duplex. Whoosh - what a difference!

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Comment from Peter Read on 2007-06-19

2007-06-19T22:18:36Z

Fantastic. That clears up a lot of questions I had. Thanks Leo.

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A comment on: How do I maximize data transfer speed on my LAN?

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