I agree with you if the seek times are different.  But assuming that they
are similar, I think that drive B will have more throughput after
defragmentation.

Bobby

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of warpmedia
Sent: Friday, March 18, 2005 2:29 PM
To: The Hardware List
Subject: Re: [H] More defrag results


If drive A (the slower) has a slower SEEK time than drive B (the 
faster), then drive A should be MORE affected by fragmentation than 
drive B, not less. Further, Drive A should be even more affected by 
fragmentation since it combines longer seeks with slower transfers.

I guess seek could be moot if you're talking a few ms difference + 
factor in the caching algorithm, but then it's raw throughput that would 
make drive B faster after defragmenting.

Ouch, headaches can form quick contemplating the variables. Too bad 
there's no synthetic benchmark to test fragmentation effects.


Bobby Heid wrote:
> I would think so.  Because the delay in speed is the movement of the 
> heads. So in your example, drive A (the slower one) can only move x 
> amount of data in a given amount of time.  The fragmentation causes a 
> more or less constant (for a given fragmentation scenario) time for 
> head movement.  So drive B, which has a higher transfer rate due to 
> the higher RPM, can move more data in a given amount of time.  
> Therefore, if you take away the fragmentation, it will have a greater 
> benefit from not being fragmented.
> 
> Sorry for the rambling answer.  Wasn't sure how to express what I was 
> thinking.  LOL.
> 
> Bobby
> 

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