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From: Ron Johnson on 1 Jul 2010 06:30
On 06/30/2010 11:37 PM, Stan Hoeppner wrote:
> Josep M. put forth on 6/30/2010 2:11 PM:
>
>> The performance of this HD is very poor,my old computer, SATA1, was much
>> more fast than this SATA2 so, I'm looking how increase the performance
>> of this computer.
>
> This 1.5TB Seagate ST31500541AS drive spins at 5900 rpm. Was your old drive a
> 7200 rpm model? If so, that would explain the performance drop. The old
> drive will probably be faster across the board with random I/O. The new drive
> will likely stream sequential I/O a bit faster. Given that the bulk of most
> workstation/desktop I/O is random, the drive with the faster spindle speed
> will have better performance, even if it is older.

This is an example of why you need to think long and hard before
buying "green" drives.

> For example, as a test, slap a used U320 SCSI card and a 5 year old 73GB
> 15,000 rpm Seagate or IBM U320 SCSI disk into your current workstation and
> you'll see it run circles around _any_ brand new 750-2TB SATA drive. It'll be
> twice as fast or more with random I/O pretty much across the board, and will
> still be competitive WRT streaming I/O.
>
> When it comes to mechanical disk performance, there is no substitute for
> spindle speed.
>


--
Seek truth from facts.


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