On 2011-11-17 12:20, Jeremy Chadwick wrote:
On Thu, Nov 17, 2011 at 12:03:26PM +0100, Willem Jan Withagen wrote:
On 2011-11-16 18:22, Peter Maloney wrote:
Willem,
I can only guess, but...
Is AHCI enabled in the bios? If you are not using 'fake-raid' for any
disks, you should [depending on FreeBSD version, HBA, etc.] probably
enable AHCI. Some servers actually come with SATA set in IDE mode. And
if you are using zfs, the controller optimally should not be RAID at
all. And if you have AHCI enabled already, try disabling it (losing hot
swapping ability, and some performance).
ACHI is enabled otherwise I cannot used the last set of SATA
connectors with this MB. Controller for these connectors is CH9.
There are two "kinds" of AHCI on FreeBSD -- and I'm speaking strictly
about the kernel bits, not AHCI the option ROM/BIOS option:
ataahci.ko -- this is "AHCI support using ata(4)"
ahci.ko -- this is "AHCI support using CAM(4)"
You want the latter, and I can tell you're using the former (if at all).
I did 'man ahci', and followed it from there.
So now I'm running with ahci.
There would be no "ata6" if you were using ahci.ko; it would be called
something like ahcichX, indicating "AHCI channel X". Furthermore,
because CAM(4) gets used, your disk device names change from adX to
adaX. This is expected. Using ataahci.ko results in the disks still
being named adX, because it uses ata(4).
ahci0: <Intel ICH9 AHCI SATA controller> port
0x1c70-0x1c77,0x1c64-0x1c67,0x1c68-0x1c6f,0x1c60-0x1c63,0x1c00-0x1c1f
mem 0xdf923000-0xdf9237ff irq 17 at device 31.2 on pci0
ahci0: [ITHREAD]
ahci0: AHCI v1.20 with 6 3Gbps ports, Port Multiplier supported
ahcich0: <AHCI channel> at channel 0 on ahci0
ahcich0: [ITHREAD]
ahcich1: <AHCI channel> at channel 1 on ahci0
ahcich1: [ITHREAD]
ahcich2: <AHCI channel> at channel 2 on ahci0
ahcich2: [ITHREAD]
ahcich3: <AHCI channel> at channel 3 on ahci0
ahcich3: [ITHREAD]
ahcich4: <AHCI channel> at channel 4 on ahci0
ahcich4: [ITHREAD]
ahcich5: <AHCI channel> at channel 5 on ahci0
ahcich5: [ITHREAD]
Hope this helps shed some light on the confusion. Generally speaking
you want to be using ahci.ko, mav@ and many others have spent a lot of
time working on that and getting it to play nice with CAM -- it's
beautiful, and hot-swapping works perfectly on all the Intel ICHxx
systems I've tried it on (ICH7R, ICH9R).
For the time being I can only concur with you. Scrubbing is way much
faster than with the ata driver.
--WjW
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