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Re: [OM] Western Digital My Passport Essential USB 2.0-Powered External

Subject: Re: [OM] Western Digital My Passport Essential USB 2.0-Powered External Drives
From: Wayne Harridge <wayneharridge@xxxxxxxxxxxxxxx>
Date: Tue, 03 Feb 2009 15:02:17 +1100



> Chuck Norcutt <> wrote:
> 
> 
> But do be aware of what you're comparing.  If you are simply reading 
> from the USB drive into memory but reading and writing between the two 
> SATA drives then the write operation has the SATA drives at a big 
> disadvantage.  Writing takes longer than reading and the reading from 
> drive 1 can't go any faster then the writing to drive 2 once the cache 
> is full.
> 

Other factors that might be involved: sharing of the bus and/or controller 
between the 2 drives.

...Wayne

Wayne Harridge

http://lrh.structuregraphs.com
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