From: Thomas Fjellstrom <thomas@fjellstrom.ca>
To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: linux-raid@vger.kernel.org
Subject: Re: Raid 5 rebuild and Raid 6 reshape question
Date: Sun, 19 Apr 2015 13:42:52 -0600 [thread overview]
Message-ID: <7771744.HcGeMFsTMj@balsa> (raw)
In-Reply-To: <alpine.DEB.2.02.1504191041250.16871@uplift.swm.pp.se>
On Sun 19 Apr 2015 10:43:32 AM Mikael Abrahamsson wrote:
> On Sat, 18 Apr 2015, Thomas Fjellstrom wrote:
> > problem. I was just curious as to how long an actual raid5->raid6
> > reshape would normally be or this setup. I expect it normally can take a
> > while as it has to rewrite a lot of data (11TiB worth).
>
> In my experience it takes 5-15 times longer than a normal resync takes, to
> reshape from raid5->raid6. So for your 3TB disk size case, I'd say expect
> 4-8 days or so.
Ah. Good to know. mdstat was saying about 4-5 days. I kindof thought that was
about normal given the amount of work involved to restripe all drives and
calculate parity.
Thanks :)
--
Thomas Fjellstrom
thomas@fjellstrom.ca
prev parent reply other threads:[~2015-04-19 19:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-17 17:55 Raid 5 rebuild and Raid 6 reshape question Thomas Fjellstrom
2015-04-18 13:13 ` Mikael Abrahamsson
2015-04-18 19:38 ` Thomas Fjellstrom
2015-04-19 8:43 ` Mikael Abrahamsson
2015-04-19 19:42 ` Thomas Fjellstrom [this message]
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