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Message-ID: <20080801233459.11e9b254@lxorguk.ukuu.org.uk> Date: Fri, 1 Aug 2008 23:34:59 +0100 From: Alan Cox <alan@...rguk.ukuu.org.uk> To: Tejun Heo <htejun@...il.com> Cc: Elias Oltmanns <eo@...ensachen.de>, Jeff Garzik <jeff@...zik.org>, Bartlomiej Zolnierkiewicz <bzolnier@...il.com>, James Bottomley <James.Bottomley@...senpartnership.com>, Pavel Machek <pavel@....cz>, linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 3/5] libata: Implement disk shock protection support > 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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