Re: [PATCH] laptop mode

[Jeff Garzik]

Barry K. Nathan wrote:
> On Sat, Oct 11, 2003 at 03:59:43PM +0200, Jens Axboe wrote:
>
> > Not very likely, imho. People have been using spin down with hdparm for
> > years (in Linux and elsewhere), while acoustic management is a bit more
> > esoteric.
>
>
> I'm having trouble finding this on Google now, but I've heard rumors
> over the years of old Fireball drives corrupting data if they receive
> write commands too soon after spinning up (i.e., the drive doesn't
> bother waiting to spin up fully first). Maybe I'm not remembering the
> details correctly, but it was something about the drive trying to act on
> commands before it was fully spun up and malfunctioning as a result.


Well, there exists devices which comply with the delayed spin-up part of 
ATA/ATAPI specification...   maybe our code doesn't cover that.  I don't 
put much stock in rumors, but they are occasionally clues... :)

	Jeff


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