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Date: Wed, 20 Nov 2002 08:28:35 -0600 (CST)
From: Steven Timm <timm@fnal.gov>
To: Manish Lachwani <manish@Zambeel.com>
cc: "'Barry K. Nathan'" <barryn@pobox.com>, <linux-kernel@vger.kernel.org>
Subject: RE: AMD 760MPX dma_intr: error=0x40 { UncorrectableError }
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Any idea how to reduce the acoustic mode from performance to quiet?
Nothing in the seagate tools as far as I can tell.

Steve


------------------------------------------------------------------
Steven C. Timm (630) 840-8525  timm@fnal.gov  http://home.fnal.gov/~timm/
Fermilab Computing Division/Operating Systems Support
Scientific Computing Support Group--Computing Farms Operations

On Tue, 19 Nov 2002, Manish Lachwani wrote:

> Basically, I could also control the temperature of the seagate drives by
> operating them in quiet mode. If the acoustic levels are regulated, then the
> power consumption and heat generated also reduces. I did not notice any
> performance degradation. Seagate is shipped with the performance mode
> acoustic level. So, reduce it to quiet mode and see if the temperature is
> reduced
>
> -----Original Message-----
> From: Barry K. Nathan [mailto:barryn@pobox.com]
> Sent: Tuesday, November 19, 2002 7:48 PM
> To: Manish Lachwani
> Cc: 'Steven Timm'; linux-kernel@vger.kernel.org
> Subject: Re: AMD 760MPX dma_intr: error=0x40 { UncorrectableError }
>
>
> On Tue, Nov 19, 2002 at 04:08:22PM -0800, Manish Lachwani wrote:
> > I have seen this errors on Seagate ST380021A 80 GB drive on a large scale
> in
> > our storage systems that make use of 3ware controllers. Seagate claims the
> > following reasons:
> >
> > 1. Weak Power supply
> > 2. tempeature and heat
> > 3. vibration
>
> You might want to pay particular attention to #2. See below.
>
> > Although, the maxtor 160 GB drives do not show such problems at all. Such
> > problems can be eliminated though. From the SMART data, get the bad
> sectors
> > and remap them by writing to the raw device. Those pending sectors will
> get
> > remapped. However, the problems will persist with these drives. In our
> > boxes, the operating temperature is abt 55 C ...
>
> Unless they're really really new, the 160GB Maxtor drives are 5400RPM
> so they put out far less heat. (The fact that the Maxtors are ball-bearing,
> vs. the Seagates' fluid bearings, also helps in this regard --
> fluid-bearing drives tend to dissipate more heat.)
>
> 55 C is technically within the Seagate specs, but it's arguably a bit on
> the high side. If possible, it might be interesting to bring it the
> temperature down several degrees and see if the reliability improves.
>
> -Barry K. Nathan <bnathan@math.uci.edu>
>

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