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Date: Tue, 16 Apr 2002 07:11:12 +0200
From: Martin Dalecki <dalecki@evision-ventures.com>
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To: Petr Vandrovec <VANDROVE@vc.cvut.cz>
CC: Jens Axboe <axboe@suse.de>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] IDE TCQ #4
In-Reply-To: <274A9BD5C76@vcnet.vc.cvut.cz>
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Petr Vandrovec wrote:
> On 15 Apr 02 at 18:44, Jens Axboe wrote:
> 
> 
>>>You can run a IDENTIFY_DEVICE from user space with the task ioctls and
>>>look at word 83 -- bit 1 and 14 must be set for TCQ to be supported. If
>>>you give me the model identifier from the IBM drive, I can tell you if
>>>it has tcq or not...
>>>
>>>I'll write a small util to detect this tomorrow and send it to you + the
>>>list.
>>
>>Duh, you can of course just look at /proc/ide/ideX/hdY/identify and
>>parse that. The info above is still valid for that, of course :-)
> 
> 
> If I parsed file correctly (it is 83 decimal word, yes?), WD's
> WDC WD1200JB-00CRA0 supports TCQ too. I'm still deciding which of
> TCQ #X and IDE #YY patches should be aplied to 2.5.8 to get optimal
> results (and I have to disconnect slaves...).

IDE 35 ist the latest from Jens with a fix for a wrong memset.
So you should go for IDE 34, 35, since they apply on top of each other.

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