"S�ren" == S�ren Schmidt <[EMAIL PROTECTED]> writes:
S�ren> David Gilbert wrote:
"Jo�o" == Jo�o Carlos Mendes Lu�s <[EMAIL PROTECTED]> writes:
Jo�o> IIF they really have command queueing, I do believe. So, a Jo�o> bridged SATA drive will not have command queuing, right?
Well... from what I've read, the WD bridged drives do have queueing because they had an ATA-100 implementation of it.
Jo�o> Does FreeBSD already take advantage of this? How could I check Jo�o> if my SATA drivers have command queueing or not?
I'd like to know as well.
S�ren> Currently the ATA driver does not support neither TCQ nor NCQ.
S�ren> For this to work at all both disk and controller needs to S�ren> support the mode in question. I've just gotten my hands on one S�ren> of the new Promise controllers that supports NCQ, but I still S�ren> need disks to get it going. I do have a few Raptor's that S�ren> support the TCQ mode but initial testing shows little benefit S�ren> from it so it moved to the backburner...
Do you need direct access to a drive or is access to a machine with a drive/controller in it sufficient. Are promise controllers the only ones to support NCQ so far? Promise doesn't always have the best reputation. We may be able to provide a test machine with remote access to a drive/controller combination.
Usually I'd need "hands on" HW for things like this, as there might be alot of resetting/powertoggle in there until things gets twisted the right way, its just so much easier to deal with. Lets see how things turns out, if I cannot get my hands on real disks here in the lab, I'll take you up on the offer..
--
-S�ren
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