From: Phillip Susi <psusi@ubuntu.com>
To: Hugo Mills <hugo@carfax.org.uk>,
helmut@hullen.de, linux-btrfs@vger.kernel.org
Subject: Re: "not enough space" with "data raid0"
Date: Wed, 28 Mar 2012 14:38:48 -0400 [thread overview]
Message-ID: <4F735AB8.40301@ubuntu.com> (raw)
In-Reply-To: <20120317121909.GB3172@carfax.org.uk>
On 3/17/2012 8:19 AM, Hugo Mills wrote:
>> Where is the problem, how can I use the full space?
>
> You can't. btrfs requires RAID-0 to be at least two devices wide
> (otherwise it's not striped at all, which is the point of RAID-0). If
> you want to use the full capacity of both disks and don't care about
> the performance gain from striping, use -d single (which is the
> default). If you do care about the performance gain from striping,
> then you're going to have to lose some usable space.
So currently btrfs's concept of raid0 is "stripe across as many disks as
possible, with a minimum of 2 disks". Is there any reason for that
minimum? I don't see why it can't allow only one if that's the best it
can manage.
next prev parent reply other threads:[~2012-03-28 18:38 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-17 12:01 "not enough space" with "data raid0" Helmut Hullen
2012-03-17 12:13 ` Chris Samuel
2012-03-17 12:18 ` Helmut Hullen
2012-03-17 12:19 ` Hugo Mills
2012-03-28 18:38 ` Phillip Susi [this message]
2012-03-28 22:11 ` Alex
2012-03-29 1:07 ` Duncan
2012-03-17 12:19 ` Alex
2012-03-17 12:25 ` Hugo Mills
2012-03-17 13:36 ` Alex
2012-03-17 14:00 ` Hugo Mills
2012-03-17 14:24 ` Helmut Hullen
2012-03-17 14:43 ` Hugo Mills
2012-03-17 15:17 ` Alex
2012-03-19 15:14 ` Alex
2012-03-19 17:58 ` Hugo Mills
2012-03-19 21:45 ` Alex Plumbley-Jones
2012-03-17 13:46 ` Helmut Hullen
2012-03-17 14:04 ` Hugo Mills
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