From: Mikael Abrahamsson <swmike@swm.pp.se>
To: "Patrik Horník" <patrik@dsl.sk>
Cc: Neil Brown <neilb@suse.de>, linux-raid@vger.kernel.org
Subject: Re: Hot replacing device in RAID 6
Date: Sun, 5 Oct 2014 18:46:07 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.02.1410051843040.14735@uplift.swm.pp.se> (raw)
In-Reply-To: <CAAOsTSmn3MDn-a6usUTpmBObwYngvFNNRUXXF6zhmDKyUTHU_w@mail.gmail.com>
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On Sun, 5 Oct 2014, Patrik Horník wrote:
> I want to ask for best solution for replacing device in RAID 6 array.
>
> - We discussed couple of years ago hot replacing the drive. I see it
> is now supported in mdadm. Is it rock stable and can be used on
> production data? I have kernel and mdadm from debian testing, 3.14-2
> and 3.3-2. Were there some important fixes from these versions? I have
> this server on UPS but not on aggregator so there is real danger of
> power outage and need to shutdown the array during operation.
I have successfully used the replace function without ill effects, and I
believe this was with a 3.8.x kernel. The function itself has been around
since 3.3 or so.
I don't want to give you any recommendations, but next time I need to
replace a failing drive that is still operational enough to stay in the
raid, personally I will use the replace function. The code is a few years
old by now and I imagine it has been used quite a lot by now.
--
Mikael Abrahamsson email: swmike@swm.pp.se
next prev parent reply other threads:[~2014-10-05 16:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-05 16:36 Hot replacing device in RAID 6 Patrik Horník
2014-10-05 16:46 ` Mikael Abrahamsson [this message]
2014-10-05 18:30 ` Keith Keller
2014-10-06 13:30 ` Patrik Horník
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