Casey Bralla on 22 Mar 2008 04:14:57 -0700

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[PLUG] Disk Transfer Speeds

How fast are file transfers on your computer?

Recently, I noticed that some of my networked servers seemed very slow.  On large (100+ 
MByte) file transfers, I was getting rates less than 1 MBit/sec.  Changing out an old 
10 MBit/sec hub to a 100 MBit/sec switch increased the speed to about 8-9 MBits/sec.  
A little more investigation revealed that *local* transfers (on the same disk) maxed 
out at about 9 MBits/sec.  This seems to point to a limitation on the disk itself.  

This still seems slow to me.   

I've got a fairly good computer:  AMD 3400+, 2 GBytes of RAM, Gentoo, KDE, ReiserFS, 
Disk DMA active, with a half-dozen programs running.

I'm curious what speeds other people get with large files.  (Gotta be sure that the 
file is bigger than the cache to keep from getting bogus numbers)


Casey Bralla
Chief Nerd in Residence
The NerdWorld Organisation
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