From: Mark Lord <liml@rtr.ca>
To: Artem Bokhan <aptem@ngs.ru>
Cc: Tejun Heo <htejun@gmail.com>, linux-ide@vger.kernel.org
Subject: Re: [PATCH #upstream-fixes] sata_mv: don't issue two DMA commands concurrently
Date: Thu, 14 Aug 2008 15:49:02 -0400 [thread overview]
Message-ID: <48A48C2E.7020902@rtr.ca> (raw)
In-Reply-To: <48A43054.80605@ngs.ru>
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
next prev parent reply other threads:[~2008-08-14 19:49 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 [this message]
2008-08-15 5:35 ` Artem Bokhan
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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