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In-reply-to: Your message of "Mon, 16 Nov 2009 17:59:35 +0200."
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Date: Mon, 16 Nov 2009 12:46:11 PST
From: Dieter <freebsd@sopwith.solgatos.com>
Cc: 
Subject: Re: Adaptec 1405 on FreeBSD 
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In message <4B0176E7.7080204@FreeBSD.org>, Alexander Motin writes:

> >>> - SiI3124-based - fast and functional. It is actually PCI-X one, but
> >>> there are many boards with built-in PCIe bridges.
> > 
> > Do any of these fit in a x1 slot?
> 
> I was surprised, but yes.

My google-fu fails me.  Any make/model, URLs, or keywords?

> And as expected, bus limits it performance
> badly. But it is still works much faster then 3132 at the same bus.

Hmmm, I must not have tested both disks at once before on the 3132:

One at a time:

   dd if=/dev/ad18 bs=1m count=1000 of=/dev/null
   1048576000 bytes transferred in 8.807009 secs (119061534 bytes/sec)

   dd if=/dev/ad20 bs=1m count=1000 of=/dev/null
   1048576000 bytes transferred in 8.800526 secs (119149243 bytes/sec)

Two at once:

   dd if=/dev/ad18 bs=1m count=1000 of=/dev/null & dd if=/dev/ad20 bs=1m count=1000 of=/dev/null
   1048576000 bytes transferred in 13.766050 secs (76171160 bytes/sec)
   1048576000 bytes transferred in 13.799268 secs (75987799 bytes/sec)

so 152 MB/s total rather than the expected ~238.  PCIe x1 slot is supposed to
be good for 250 MB/s, so it ought to be able to max out both disks at once,
or at least get close.