Messages in this thread | | | Date | Fri, 8 Jul 2005 14:32:00 -0400 (EDT) | From | Shawn Starr <> | Subject | Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer)) |
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It should be noted im using linux-2.6.git.
--- Jens Axboe <axboe@suse.de> wrote:
> On Fri, Jul 08 2005, Jon Escombe wrote: > > Jens Axboe wrote: > > > > >On Thu, Jul 07 2005, Shawn Starr wrote: > > > > > > > > >>Model: HTS548080M9AT00 (Hitachi) > > >>Laptop: T42. > > >> > > >>segfault:/home/spstarr# ./a /dev/hda > > >>head parked > > >> > > >>Seems to park, heard it click :) > > >> > > >> > > > > > >Note on that - if the util says it parked, you > can be very sure that it > > >actually did as the drive actually returns that > status outside of just > > >completing the command. > > > > > > > > It's worth noting that you'll need the libata > passthrough patch to make > > this work on a T43.. > > > > However, with this patch I'm getting the "head not > parked 4c" message, > > but I can hear the click from the drive.. It takes > around 350-400ms for > > the command to execute, but when repeated, it > drops to around 5ms for a > > short while (with no audible clicking), before > reverting to original > > behaviour after a few seconds. > > > > The clicking and the variation in execution time > lead me to think it is > > parking, but not being reported correctly? > > Sounds like a pass through bug, it should pass the > register output back > out again for a non-data command. > > Checking code... Yeah it does not. Since the 'we > parked successfully' is > stored in the lbal register, we need the full > register set copied back > into the buffer. That goes for all three HDIO_* > commands, there's still > some work to be done for the libata passthrough to > be compliant with the > ide one. > > -- > Jens Axboe > > > > ------------------------------------------------------- > This SF.Net email is sponsored by the 'Do More With > Dual!' webinar happening > July 14 at 8am PDT/11am EDT. We invite you to > explore the latest in dual > core and dual graphics technology at this free one > hour event hosted by HP, > AMD, and NVIDIA. To register visit > http://www.hp.com/go/dualwebinar > _______________________________________________ > Hdaps-devel mailing list > Hdaps-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/hdaps-devel >
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