Date: Mon, 16 Nov 2009 12:46:11 PST From: Dieter <freebsd@sopwith.solgatos.com> To: freebsd-hardware@FreeBSD.org Subject: Re: Adaptec 1405 on FreeBSD Message-ID: <200911162046.UAA02994@sopwith.solgatos.com> In-Reply-To: Your message of "Mon, 16 Nov 2009 17:59:35 %2B0200." <4B0176E7.7080204@FreeBSD.org>
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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.
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