From: Khelben Blackstaff <eye.of.the.8eholder@gmail.com>
To: linux-raid@vger.kernel.org
Subject: Re: Use of WD20EARS with MDADM
Date: Thu, 22 Apr 2010 19:13:50 +0300 [thread overview]
Message-ID: <201004221913.50692.eye.of.the.8eholder@gmail.com> (raw)
In-Reply-To: <4BCF4693.3020101@buttersideup.com>
> I believe that these disks only come in the "green" variety. I recently
> picked up a 1.5 tb version for testing and cheap bulk storage, and I
> would not suggest using them in a raid array because the green drives
> firmware automatically parks the head after 8 seconds of inactivity and
> reduces the rpm of the disk. The constant parking can quickly wear out
> the head under high use and there is no way to disable this "feature".
As previously mentioned wdidle utility can disable the head unloading.
> The specifications say it's good for 300,000 cycles, so do the
> math... getting 5 unloads per minute would lead to probable failure
> after 41 days. Granted that is about worst case, but still something to
> watch out for. In order to make it the entire 3 year warranty period,
> you need to stay under 11.4 unloads per hour. If you have very little
> IO activity, or VERY MUCH, then this is entirely possible, but more
> moderate loads in the middle have been observed to cause hundreds of
> unloads per hour.
WD mentions in the customer help (Answer ID 5357) that these newer drives
were validated to 1M load/unload cycles and not 300K.
>
> If you want to fix it, then wdidle3.exe worked for me. Search for:
>
> wdidle3_1_00.zip
>
It worked fine for me too. I had a Load Cycle Count of 59, 15 mins
after connecting the drive for the first time. After running wdidle
the Count stopped at 104 and never increased again. I now have 11 hours
With wdidle 1.00 disabling the timer did nothing. I had to set the timer to
a large value. There is a newer version though (1.03) that supports
these new drives better.
next prev parent reply other threads:[~2010-04-22 16:13 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-25 16:20 Use of WD20EARS with MDADM Andrew Dunn
2010-03-25 17:01 ` Asdo
2010-03-25 17:58 ` Mark Knecht
2010-03-25 20:23 ` John Robinson
2010-03-26 10:45 ` Asdo
2010-03-25 17:10 ` David Lethe
2010-03-25 17:45 ` Asdo
2010-03-28 16:19 ` Stefan *St0fF* Huebner
2010-03-29 16:59 ` WD20EARS data Stefan /*St0fF*/ Hübner
2010-03-29 17:13 ` Stefan /*St0fF*/ Hübner
2010-04-14 19:53 ` Use of WD20EARS with MDADM Bill Davidsen
2010-04-19 14:17 ` Phillip Susi
2010-04-21 13:20 ` Bill Davidsen
2010-04-21 13:45 ` Tim Small
2010-04-21 14:32 ` Mikael Abrahamsson
2010-04-21 21:58 ` Berkey B Walker
2010-05-02 22:33 ` Bill Davidsen
2010-05-03 0:08 ` Berkey B Walker
2010-04-21 15:14 ` Phillip Susi
2010-04-21 16:42 ` Bill Davidsen
2010-04-21 17:36 ` Mark Knecht
2010-04-21 18:40 ` Tim Small
2010-04-21 19:01 ` Mark Knecht
2010-04-21 19:31 ` Clinton Lee Taylor
2010-04-22 0:51 ` Steven Haigh
2010-04-21 19:33 ` Phillip Susi
2010-04-21 20:36 ` Mark Knecht
2010-05-12 13:06 ` Tim Small
2010-04-22 11:40 ` wdidle3 Tim Small
2010-04-22 16:13 ` Khelben Blackstaff [this message]
2010-04-22 18:16 ` Use of WD20EARS with MDADM Simon Matthews
2010-04-22 19:44 ` Phillip Susi
2010-04-22 23:23 ` Mark Knecht
2010-04-23 0:03 ` Richard Scobie
2010-04-23 1:29 ` Mark Knecht
2010-04-23 3:49 ` Phillip Susi
2010-04-23 3:44 ` Phillip Susi
2010-04-21 15:52 ` Simon Matthews
2010-04-21 19:24 ` Richard Scobie
2010-03-26 20:27 ` Peter Kieser
2010-03-26 20:59 ` Mark Knecht
2010-03-26 21:01 ` Peter Kieser
2010-03-26 21:06 ` Mark Knecht
2010-03-26 21:16 ` Mark Knecht
2010-03-26 21:19 ` Richard Scobie
2010-03-26 22:38 ` Mark Knecht
2010-03-26 22:47 ` Peter Kieser
2010-03-26 22:50 ` Matt Garman
2010-03-26 22:51 ` Peter Kieser
2010-03-26 23:01 ` David Rees
2010-03-27 23:31 ` Mark Knecht
2010-03-26 21:45 ` Matt Garman
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