Date: Tue, 04 Sep 2001 15:58:43 -0400 From: Jason Andresen <jandrese@mitre.org> To: niek@bergboer.net Cc: freebsd-hackers@freebsd.org Subject: Re: Tagged Command Queuing support for IC-35L0?0 ? Message-ID: <3B953273.5001C515@mitre.org> References: <20010904192030.A2347@wit379119.student.utwente.nl>
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Niek Bergboer wrote:
>
> Hi,
>
> I posted this message on -questions, and since I got no reply I've
> assumed that it's technical enough to post here on -hackers.
>
> Since FBSD 4.3-RELEASE, tagged command queuing is supported for IBM
> DTLA and DPTA IDE drives. However, the newer "Deskstar GXP" drives
> also support TCQ according to IBM's website?
>
> Can these newer drives, based on the IC-35L0?0-chipset, also be used
> with TCQ enabled in FBSD? (? is 2, 4 or 6 depending on whether the
> drive has 20, 40 or 60 GB capacity).
I think so:
ad0: 58644MB <IC35L060AVER07-0> [119150/16/63] at ata0-master tagged
UDMA33
I had to manually add "IC35L060AVER07-0" to ata-disk.c (around line 832)
to get FreeBSD to use it though.
...
ad_tagsupported(struct ad_softc *adp)
{
const char *drives[] = {"IBM-DPTA", "IBM-DTLA", "IC35L060AVER07-0",
NULL};
...
This was a month or so though, so someone might have done the right
thing
and figured out how to parse those new IBM product strings to determine
if the drive supports CTQ or not.
--
\ |_ _|__ __|_ \ __| Jason Andresen jandrese@mitre.org
|\/ | | | / _| Network and Distributed Systems Engineer
_| _|___| _| _|_\___| Office: 703-883-7755
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