Re: [PATCH 3/5] libata: Implement disk shock protection support

[Alan Cox]

> However, SATA or not, there simply isn't a way to abort commands in ATA.
>  Issuing random command while other commands are in progress simply is
> state machine violation and there will be many interesting results
> including complete system lockup (ATA controller dying while holding the
> PCI bus).  The only reliable way to abort in-flight commands are by
> issuing hardreset.  However, ATA reset protocol is not designed for
> quick recovery.  The machine is gonna hit the ground hard way before the
> reset protocol is complete.

Actually you cau can issue idle immediate on older ATA devices. I am not
clear if that was stuck back into the current accelerometer friendly
drives or not. Would need to check with IBLenovo

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