Messages in this thread | | | Date | Mon, 01 Aug 2005 20:44:31 +0100 | From | Jon Escombe <> | Subject | Re: [Hdaps-devel] Re: IBM HDAPS, I need a tip. |
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> hard drive parking was already sorted out. We have a script that does this > and works great parking the heads.
Would have to disagree with you here. Jens' ATA7 parking code is a great start but we still have a couple of issues to address before it's usable for this purpose. (1) it only works on a subset of the devices that the Windows driver works for, and (2) we need a way to freeze the device for a short period so that the next I/O request doesn't wake it up before it hits the floor...
> The problem here is that we have 10 different models. > > One will have 20 as X and the others will have 500 as x. Some will increment > in 20 when you move them 45Deg, and some will increment 50. > > How can you determine from an shake, to a fall?
If there really are devices with resting values of 20 then I would agree we have a problem. I've tried on a few different Thinkpads and have always seen resting values of several hundreds. If this is true for all, I would like to think we could estimate a sensible value that works for everyone...
Regards, Jon.
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