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How fast should a file copy?

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BrentM

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Jan 30, 2000, 3:00:00 AM1/30/00
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I upgraded to a D-Link 100mb switch. It says all cards are 100mb and
full duplex.

A 100meg file copies over my 100mb LAN in 1minute, 11seconds.

When it was a 10mb LAN, it copied in 2minutes, 22seconds.

1. Shouldn't I have seen a better increase when I went from 10 to 100?
2. How fast should a 100meg file copy?

Halfton

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Jan 30, 2000, 3:00:00 AM1/30/00
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A little more info is needed IE:
OS's used, Protocols loaded/used, Services used, how many Computers shareing
the bandwidth, Cable Type/Length, Nic card settings Auto or Forced
All above can and do effect Thruput
hth
joe
"BrentM" <bre...@nospam.net> wrote in message
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BrentM

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Jan 30, 2000, 3:00:00 AM1/30/00
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Nothing fancy. Just a home lan, so no bandwidth issues.
Win2K talking to Win98. IP and NetBUEI are loaded.
short Cat5 cable, auto settings.

Halfton

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Jan 30, 2000, 3:00:00 AM1/30/00
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Test with just TCP then Just NetBEUI, also with W2k we can select which
protocol is primary and it does have an effect on speed

hth
joe
"BrentM" <bre...@nospam.net> wrote in message
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BrentM

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Jan 30, 2000, 3:00:00 AM1/30/00
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I just did a test with the same file between two Win2000 machines.
Only took about 45 seconds! Wow. Win98 networking sucks or else
something is setup a bit differently.

I still feel it's odd that I went from 10 to 100 and the speed was
exactly half. Makes me think I was 100 all along but only
half-duplex. My old hub was only a 10mb though so that shouldn't be
possible.

Neil D

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Feb 4, 2000, 3:00:00 AM2/4/00
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On Sun, 30 Jan 2000 02:20:17 GMT, bre...@nospam.net (BrentM) wrote:

>I upgraded to a D-Link 100mb switch. It says all cards are 100mb and
>full duplex.
>
>A 100meg file copies over my 100mb LAN in 1minute, 11seconds.
>
>When it was a 10mb LAN, it copied in 2minutes, 22seconds.
>
>1. Shouldn't I have seen a better increase when I went from 10 to 100?
>2. How fast should a 100meg file copy?
>

Your 100 Mbps network
-----------------------------------
100 Mbps network can in theory do a maximum of 10 Megabytes per second
100 MBytes in 71 seconds = about 1.5 Megabytes per second

Your bottleneck here is most likely disk speed believe it or not.
Unless absolutely massive ram of >256 MB your systems will not cache a
100 MB file very well.

Your 10 Mbps network
----------------------------------
100 Mbytes in 142 seconds = about 0.7 Megabytes per second = 700
kB/sec = 7 Mbps which is pretty efficient for that network

A good general test is if copying a file across your network happens
at the same speed as if you were copying it locally from one directory
to another. If so, your bottleneck is disk throughput.


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