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

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

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

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

2007-06-30T19:46:01Z

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

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

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

Tech Questions? Get Answers! - Ask Leo! ... by Leo Notenboom
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Comment from Leo A. Notenboom on 2007-06-23

2007-06-24T00:18:22Z

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

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

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

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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?

Tech Questions? Get Answers! - Ask Leo! ... by Leo Notenboom
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