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Date: Thu, 26 Jul 2007 09:34:27 -0700
From: Jeremy Chadwick <koitsu@FreeBSD.org>
To: Abdullah Ibn Hamad Al-Marri <almarrie@gmail.com>
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Cc: freebsd-stable@freebsd.org, Tim Daneliuk <tundra@tundraware.com>,
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Subject: Re: SATA 300 Drive Being Run At 150
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On Thu, Jul 26, 2007 at 06:50:32PM +0300, Abdullah Ibn Hamad Al-Marri wrote:
>  Here is me too.
> 
>  ad0: 70911MB <WDC WD740ADFD-60NLR1 20.07P20> at ata0-master SATA150
>  ad2: 238474MB <WDC WD2500JD-50FYB0 02.05D02> at ata1-master SATA150

Did you bother to look at the documentation on the disks you're buying?
It doesn't seem like it.  Taken from Western Digital's specifications
for the above drives:

WD740ADFD -- http://wdc.custhelp.com/cgi-bin/wdc.cfg/php/enduser/std_adp.php?p_faqid=1405&p_created=1135201452
WD2000JD  -- http://wdc.custhelp.com/cgi-bin/wdc.cfg/php/enduser/std_adp.php?p_faqid=1027&p_created=1056559256

Summary:

WD740ADFD -- 10000rpm, 4.5ms seek, SATA150, 16MB cache
WD2000JD  --  7200rpm, 8.9ms seek, SATA150,  8MB cache

Neither of these drives have SATA300-capable controllers on them.
Therefore, there is no problem.

-- 
| Jeremy Chadwick                                    jdc at parodius.com |
| Parodius Networking                           http://www.parodius.com/ |
| UNIX Systems Administrator                      Mountain View, CA, USA |
| Making life hard for others since 1977.                  PGP: 4BD6C0CB |