On 12/17/2009 09:22 PM, Stan Hoeppner wrote:
Jeff Garzik put forth on 12/17/2009 12:01 PM:
On 12/17/2009 09:16 AM, Stan Hoeppner wrote:
Hi Jeff,
I recently added a Silicon Image 3512 based PCI card to an old Intel
440BX machine along with a single platter 500GB WD SATA2 drive. I'd
have gone with an ahci sata2 controller but couldn't find one in 33MHz
PCI. I compiled a new kernel, adding SCSI disk, libata and sata_sil
support using make menuconfig and kernel.org sources installed the
debian way on lenny 5.0.3. I left the old piix diver in so I could
still boot from the old IDE disk and move the entire Linux system over.
That all went pretty smoothly, I'm now booting from the new disk, and
the sata subsystem is working pretty well, especially compared to the
old 40GB Maxtor IDE disk (now removed from the system).
sata_sil hardware does not support NCQ.
Jeff
Dangit, I thought the 3512 was one of the SiI chips that did support it.
My mistake. Is there anything else I can tweak to get more of this
drive's performance or am I stuck with what I have? My read of your
default UDMA/100 comments is that it's a safety net type setting for the
3112. Would bumping this to UDMA/133 give me any improvement over the
PCI bus? Is there anything else I could tweak?
Nope. You are pretty much maxing out the drive, of whatever drive you
plug in. The sata bus -- at its hardware spec'd maximum -- is far
faster than just about any drive, and the PCI bus is far faster than the
sata bus.
You could probably max out the SATA bus with a RAM-based SATA device;
that's it.
Jeff
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