From: Roman Mamedov <rm@romanrm.net>
To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: Linux Raid <linux-raid@vger.kernel.org>
Subject: Re: When do you replace old hard drives in a raid6?
Date: Wed, 9 Mar 2016 11:59:05 +0500 [thread overview]
Message-ID: <20160309115905.5ff2e9dd@natsu> (raw)
In-Reply-To: <alpine.DEB.2.02.1603090733030.31096@uplift.swm.pp.se>
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On Wed, 9 Mar 2016 07:43:16 +0100 (CET)
Mikael Abrahamsson <swmike@swm.pp.se> wrote:
> I had very high failure rates of the early 2TB WD Greens, but I still have
> some WD20EARS and WD20EADS that are alive after 58k hours.
In my experience a major cause for the WD failures is that they develop rust
on the PCB contacts which connect to the drive insides, see e.g.:
http://ods.com.ua/win/rus/other/hdd/2/wd_cont2.jpg
http://www.chipmaker.ru/uploads/monthly_12_2013/post/image/post-7336-020632100%201388236036.jpg
and: https://www.youtube.com/watch?v=tDTt_yjYYQ8
If such WD drive has just developed several unreadable sectors, this often can
be solved by checking and cleaning those contacts, then overwriting the whole
drive with zeroes (or well, with whatever you want, the point is to rewrite
all the "badly written" areas), then it will likely work fine for years after
that.
> One of the slightly lower power on time ones has a scary load cycle count
> though:
>
> Device Model: WDC WD20EARS-00S8B1
> 9 Power_On_Hours 0x0032 033 033 000 Old_age Always - 49255
> 193 Load_Cycle_Count 0x0032 001 001 000 Old_age Always - 1317839
This can be disabled:
http://www.storagereview.com/how_to_stop_excessive_load_cycles_on_the_western_digital_2tb_caviar_green_wd20ears_with_wdidle3
http://idle3-tools.sourceforge.net/
--
With respect,
Roman
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next prev parent reply other threads:[~2016-03-09 6:59 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-05 20:49 When do you replace old hard drives in a raid6? Ram Ramesh
2016-03-07 0:29 ` Phil Turmel
2016-03-07 0:52 ` Ram Ramesh
2016-03-07 2:31 ` Weedy
2016-03-07 4:40 ` Ram Ramesh
2016-03-07 5:18 ` Phil Turmel
2016-03-09 0:11 ` Ram Ramesh
2016-03-09 2:49 ` John Stoffel
2016-03-09 6:43 ` Mikael Abrahamsson
2016-03-09 6:59 ` Roman Mamedov [this message]
2016-03-07 6:59 ` Carsten Aulbert
2016-03-08 22:01 ` Wols Lists
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