From: Artem Bokhan <aptem@ngs.ru>
To: Mark Lord <liml@rtr.ca>, linux-ide@vger.kernel.org
Subject: Re: [PATCH #upstream-fixes] sata_mv: don't issue two DMA commands concurrently
Date: Fri, 15 Aug 2008 12:35:26 +0700 [thread overview]
Message-ID: <48A5159E.2010508@ngs.ru> (raw)
In-Reply-To: <48A48C2E.7020902@rtr.ca>
It uses ncq. Thanks, Mark.
Mark Lord пишет:
> Artem Bokhan wrote:
>> Now I spend ~1.9 seconds to serve one bad sector. That's great.
>> 0.75 of 1.9 seconds is a time spent on hard reset, 1.15 seconds are
>> spent on reallocation try.
>> Is hard reset real necessary to return disk to life after media error?
> ..
>
> It is necessary in many cases, but not in all.
> But the observed behaviour (reset) is the safest way to
> guarantee that things will nearly always work by default.
>
> If the drive is NOT using NCQ, and the host controller does not get
> confused
> by the incomplete data transfers (many do), then the reset is not
> necessary.
>
> You can try hacking it out, if you want to.
>
> Cheers
>
> --
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next prev parent reply other threads:[~2008-08-15 5:35 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-08 10:02 bad sectors, suspicious behaviour Artem Bokhan
2008-08-08 13:34 ` Mark Lord
2008-08-08 13:50 ` Mark Lord
2008-08-08 14:14 ` Mark Lord
2008-08-11 11:12 ` Bokhan Artem
2008-08-13 8:40 ` Tejun Heo
2008-08-13 10:47 ` Artem Bokhan
2008-08-13 10:50 ` Tejun Heo
2008-08-13 11:19 ` Artem Bokhan
2008-08-13 11:24 ` [PATCH #upstream-fixes] sata_mv: don't issue two DMA commands concurrently Tejun Heo
2008-08-13 11:37 ` Artem Bokhan
2008-08-13 11:52 ` Tejun Heo
2008-08-13 12:05 ` Artem Bokhan
2008-08-13 12:21 ` Tejun Heo
2008-08-13 12:32 ` Artem Bokhan
2008-08-13 16:17 ` Mark Lord
2008-08-13 17:37 ` Bokhan Artem
2008-08-13 19:58 ` Bokhan Artem
2008-08-13 23:36 ` Mark Lord
2008-08-14 7:42 ` Artem Bokhan
2008-08-14 12:40 ` Mark Lord
2008-08-14 12:58 ` Artem Bokhan
2008-08-14 13:17 ` Artem Bokhan
2008-08-14 19:49 ` Mark Lord
2008-08-15 5:35 ` Artem Bokhan [this message]
2008-08-15 12:27 ` Mark Lord
2008-08-13 16:57 ` Greg Freemyer
2008-08-13 17:29 ` Bokhan Artem
2008-08-13 17:50 ` Greg Freemyer
2008-08-13 18:04 ` Bokhan Artem
2008-08-13 18:13 ` Greg Freemyer
2008-08-13 11:47 ` Artem Bokhan
2008-08-13 11:52 ` Tejun Heo
2008-08-22 16:28 ` Grant Grundler
2008-08-13 16:10 ` Mark Lord
2008-08-22 6:11 ` Jeff Garzik
2008-08-22 17:01 ` Martin Michlmayr
2008-08-26 13:54 ` Mark Lord
2008-08-29 7:12 ` Martin Michlmayr
2008-08-26 1:24 ` Gwendal Grignou
2008-08-26 7:04 ` Tejun Heo
2008-08-26 13:58 ` Mark Lord
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