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Date:      Fri, 22 May 2009 14:35:14 -0700
From:      Randy Bush <randy@psg.com>
To:        Brooks Davis <brooks@freebsd.org>
Cc:        freebsd-fs <freebsd-fs@freebsd.org>
Subject:   Re: raidz2 a bit big
Message-ID:  <m2ws88lt2l.wl%randy@psg.com>
In-Reply-To: <20090522211513.GB2160@lor.one-eyed-alien.net>
References:  <m28wkon90c.wl%randy@psg.com> <20090522211513.GB2160@lor.one-eyed-alien.net>

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> raidz2 is RAID6ish in that two disks of a raid group go to parity to
> allow you to survive double faults.  Thus your expected size is:
> 
> 	(12-2)*2TB = 20TB.

<doh>  thank you.

randy



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