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Date: Mon, 29 Dec 2014 19:04:00 +0000
From: Hugo Mills <hugo@carfax.org.uk>
To: "sys.syphus" <syssyphus@gmail.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: I need to P. are we almost there yet?
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On Mon, Dec 29, 2014 at 01:00:05PM -0600, sys.syphus wrote:
> oh, and sorry to bump myself. but is raid10 *ever* more redundant in
> btrfs-speak than raid1? I currently use raid1 but i know in mdadm
> speak raid10 means you can lose 2 drives assuming they aren't the
> "wrong ones", is it safe to say with btrfs / raid 10 you can only lose
> one no matter what?

   I think that with an even number of identical-sized devices, you
get the same "guarantees" (well, behaviour) as you would with
traditional RAID-10.

   I may be wrong about that -- do test before relying on it. The FS
probably won't like losing two devices, though, even if the remaining
data is actually enough to reconstruct the FS.

   Hugo.

-- 
Hugo Mills             | I can resist everything except temptation
hugo@... carfax.org.uk |
http://carfax.org.uk/  |
PGP: 65E74AC0          |

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