linux-kernel - Re: Have the velociraptors in a test system now, checkout the errors.

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Date:	Thu, 18 Dec 2008 18:14:24 -0500
From:	Bill Davidsen <davidsen@....com>
To:	Justin Piszcz <jpiszcz@...idpixels.com>
CC:	Redeeman <redeeman@...anurb.dk>, linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org, xfs@....sgi.com,
	smartmontools-support@...ts.sourceforge.net
Subject: Re: Have the velociraptors in a test system now, checkout the errors.

Justin Piszcz wrote:
>>
>> Calls itself "WDC WD10EACS-00D" in /sys if that helps. I could dig 
>> out the packing slip if it matters. Runs nicely so far, and if the 
>> SMART temperature probe is correct, very cool:
>>
>> /dev/sda: ST3750640AS: 43 C
>> /dev/sdb: WDC WD10EACS-00D6B1: 31 C
>> /dev/sdc: ST3750640AS: 44 C
>> /dev/sdd: ST3750640AS: 46 C
>>
>> I don't totally trust the temps, there is a LOT of 18C air going into 
>> that box, because it has a lot coming out the back and side.
>
> Hmm do you have a picture of those seagates? Seems like a lack of 
> airflow there
> or do they just run really hot?  Also, how many head unload/loads has the
> 1.0TB GP drive performed, that was one of my concerns when I was 
> looking at
> disks.

How about a diagram:

__________________________________________________
                                                  |
                                                  |
                                                  |
                                                  |
                                                  |
                                                  |
                                                  |
                                                  |
                                                  |
                                                  |
                                                  |
                                 --empty--        |
                                 (seagate)        |
                                 (WD)             |
                                 (seagate)        | <--- case
                                 (seagate)        |
                                 --empty--        |
__________________________________________________|


That's about how the drives sit in the case, air vents are in the front 
of the case, fans in back pulling air out.

-- 
Bill Davidsen <davidsen@....com>
  "Woe unto the statesman who makes war without a reason that will still
  be valid when the war is over..." Otto von Bismark 


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