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List:       linux-kernel
Subject:    Re: IDE, putting HD to sleep causes "lost interrupt"
From:       Bill Davidsen <davidsen () tmr ! com>
Date:       2002-07-31 18:52:00
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On Wed, 31 Jul 2002, Mark Lord wrote:

> Well, the answer is very simple, then:  DON'T DO THAT.
> 
> When an ATA (IDE) drive is put to sleep (-Y),
> it *requires* a reset to revive it for any future commands.
> 
> The IDE driver doesn't know about the -Y, so it just attempts
> I/O a few times before digging out the BIG hammer and doing a reset.

Would it be a reasonable thing to include the -Y information in the device
status so that the driver could know a reset was required? Since the
driver sends the command it has the chance to notice there, or might read
a status, or ??? Or is this undesirable for some other reason?

-- 
bill davidsen <davidsen@tmr.com>
  CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.

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