This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-users] Xen clients and RAID

To: David Stockwell <dstockwell@xxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] Xen clients and RAID
From: Javier Guerra <javier@xxxxxxxxxxx>
Date: Fri, 27 Feb 2009 10:00:08 -0500
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Fri, 27 Feb 2009 07:02:32 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <8702DB7223D34B1A9C185F4186DC7EED@freqonedev>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <8702DB7223D34B1A9C185F4186DC7EED@freqonedev>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
On Fri, Feb 27, 2009 at 9:51 AM, David Stockwell
<dstockwell@xxxxxxxxxxxxxxxxx> wrote:
> either Linux software
> RAID, or Fake RAID (which is the same thing).

nope, they're not the same.

FakeRAID is the name given to cards advertised as RAID cards, but in
fact are only multiport controllers, and hidden in the drivers is a
software RAID.

the difference is that with FakeRAID you're stuck with a proprietary
nonmaintained RAID. if you lose the card, you lose the RAID and all
data; while Linux software RAID is usable no matter how you connect
the drives.

even if you lose your only 24-port SATA controller, you could get 6
mainboards, plug 4 drives on each, share each disk via GNBD, access
all 24 from another host.... and you'll see your RAID and all data.


Xen-users mailing list

<Prev in Thread] Current Thread [Next in Thread>