FreeBSD for serious performance? (was: Re: 9.x -- New Install -- serious partition misalignment)

[Alexander Kabaev]

On Sat, 08 Dec 2012 19:52:34 -0800
"Ronald F. Guilmette" <rfg at tristatelogic.com> wrote:

"analysis" skipped.

> 
> As regards to the Native Command Queuing.... all I can say is "Crap!"
> I wasn't aware...until now... that FreeBSD did not support that.  That
> really is a rather entirely serious issue.  But I do think that the
> performance hit from that would be dwarfed by the performance hit that
> could be caused by the AF misaligment problem.
> 

ada0 at ahcich1 bus 0 scbus2 target 0 lun 0
ada0: <ST3750330AS SD1A> ATA-8 SATA 2.x device
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 715404MB (1465149168 512 byte sectors: 16H 63S/T 16383C)
ada0: Previously was known as ad0
ada1 at ahcich3 bus 0 scbus4 target 0 lun 0
ada1: <ST3750330AS SD1A> ATA-8 SATA 2.x device
ada1: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada1: Command Queueing enabled
ada1: 715404MB (1465149168 512 byte sectors: 16H 63S/T 16383C)

Crap! I must be dreaming then.

-- 
Alexander Kabaev
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