From: Asdo <asdo@shiftmail.org>
To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: linux-raid@vger.kernel.org
Subject: Re: feature suggestion to handle read errors during re-sync of raid5
Date: Sat, 30 Jan 2010 23:04:09 +0100 [thread overview]
Message-ID: <4B64ACD9.7020207@shiftmail.org> (raw)
In-Reply-To: <alpine.DEB.1.10.1001302228540.15329@uplift.swm.pp.se>
Mikael Abrahamsson wrote:
> I think the 4k sector size on WD20EARS (for instance) is supposed to
> add more ECC information but I'm not sure how this will affect the
> 10^14 error rate. I think the manufacturers need to work a bit more on
> it, I don't see how these drives can be used in single drive
> configuration with the current 10^14 value.
>
> I don't have experience with any other drives than the WD20EADS but
> they develop read errors at a rate higher than any other drive I've
> experienced before....
We are thinking about buying a large number of WD2002FYPS RE4-GP for a
large array (raid-6)
Anyone knows if the error rate is so high on those drives too?
Do they also use 4k sectors? Mikael, how do you find this out?
Is the 4k sectors a RMW emulation as written in
http://lwn.net/Articles/322777/
or Linux sees them really as 4k block devices?
And if it's the second, were there side effects on this?
Thank you
next prev parent reply other threads:[~2010-01-30 22:04 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-30 12:37 feature suggestion to handle read errors during re-sync of raid5 Mikael Abrahamsson
2010-01-30 17:51 ` Giovanni Tessore
2010-01-30 19:04 ` John Robinson
2010-01-30 21:33 ` Mikael Abrahamsson
2010-01-30 22:04 ` Asdo [this message]
2010-01-30 22:25 ` Mikael Abrahamsson
2010-01-31 16:17 ` John Robinson
2010-01-31 16:34 ` Asdo
2010-01-31 18:04 ` Goswin von Brederlow
2010-01-31 17:56 ` Mikael Abrahamsson
2010-02-01 1:30 ` Roger Heflin
2010-02-01 7:15 ` Mikael Abrahamsson
2010-02-01 13:33 ` Guy Watkins
2010-02-01 13:42 ` Mikael Abrahamsson
2010-02-01 15:15 ` Goswin von Brederlow
2010-02-01 16:28 ` Mikael Abrahamsson
2010-02-01 20:30 ` Richard Scobie
2010-02-02 11:06 ` John Robinson
2010-01-30 21:09 ` Asdo
2010-01-30 18:59 ` Goswin von Brederlow
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