From: Anthony Youngman <antlists@youngman.org.uk>
To: doug@easyco.com, Adam Goryachev <mailinglists@websitemanagers.com.au>
Cc: "linux-raid@vger.kernel.org" <linux-raid@vger.kernel.org>
Subject: Re: RAID5 Performance
Date: Thu, 28 Jul 2016 14:08:23 +0100 [thread overview]
Message-ID: <354d54b6-31ce-a047-be0c-1e820d5b030e@youngman.org.uk> (raw)
In-Reply-To: <CAFx4rwTMySfR27gT6You7f2T28Hq8m5Zxme1p43Fv1vtcpt_-Q@mail.gmail.com>
On 28/07/16 01:11, Doug Dumitru wrote:
> I don't know about you, but I do have SSDs, even from major vendors,
> that fail. They usually "just fall off the bus" with no warning. So
> I dislike skipping redundancy. RAID turned an emergency into a
> mundane task. It is really a cost issue. If you can afford RAID-10
> and extra space, that will work best. I don't think RAID-50 with this
> few drives makes much sense.
I came across an article about testing SSDs to destruction. First the
good news - they tended to last much longer than expected. And the bad
news? They typically contain a self-destruct switch. Once they start
failing, a power-cycle will (intentionally) kill them dead. ESPECIALLY
if they're from a major vendor.
So if you don't notice they're dying, or (as in the case of the tester)
you have power problems that tip them over the edge, your data WILL be
gone without warning.
Cheers,
Wol
next prev parent reply other threads:[~2016-07-28 13:08 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-27 2:24 RAID5 Performance Adam Goryachev
2016-07-27 3:15 ` Brad Campbell
2016-07-27 5:36 ` Doug Dumitru
2016-07-27 23:26 ` Adam Goryachev
[not found] ` <7af0cc98-e395-9446-05eb-a6c0ca20f187@websitemanagers.com.au>
2016-07-28 0:11 ` Doug Dumitru
2016-07-28 13:08 ` Anthony Youngman [this message]
2016-07-28 14:10 ` Adam Goryachev
2016-07-28 17:45 ` Peter Grandi
2016-07-27 14:26 ` Peter Grandi
2016-07-27 17:38 ` Doug Dumitru
2016-07-28 12:19 ` Peter Grandi
2016-07-28 13:28 ` Peter Grandi
2016-07-28 13:57 ` Adam Goryachev
2016-07-28 17:20 ` Peter Grandi
2016-07-28 18:45 ` Doug Dumitru
2016-08-02 7:09 ` Adam Goryachev
2016-08-03 21:23 ` Peter Grandi
2016-07-28 13:50 ` Adam Goryachev
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