RE: [Nolug] NAS

Hi Ron.

Right. I believe that Raid 10 beats Raid 5 in all of the specs. I certainly
prefer it.

The only possible down side is that you need an even number of drives. So where
a 3 drive Raid 5 might be large enough, you would need a 4th drive to go with
Raid 10.

I also echo the comments about not trusting software Raid. I had the FreeBSD
version fail on two different boxes in the past. On the other hand, I've had
drive in my Cobalt RaQ fail twice and the OS handled the situation like a dream.

John

    John Souvestre - New Orleans LA

> -----Original Message-----
> From: owner-nolug@stoney.kellynet.org [mailto:owner-
> nolug@stoney.kellynet.org] On Behalf Of Ron Johnson
> Sent: Saturday, April 10, 2010 2:39 PM
> To: nolug@nolug.org
> Subject: Re: [Nolug] NAS
>
>
> RAID5 best of both worlds?? That *highly* debatable, since it's
> write performance stinks. You need scads of BBC to make it effective.
>
> On 2010-04-10 14:14, Chris Jones wrote:
> > Well, there's no such thing as raid10 with 2 drives. You need at least
> > 4 drives for raid10. With 2 drives it would be raid1. Or raid0, but
> > only a fool would put important data on a raid0. ;) raid0 is best for
> > use as a temporary place for data processing. Raid5 is the best of both
> > worlds, and is the most cost effective.
> >
> >> On Apr 10, 2010 1:41 PM, "Joey Kelly" <joey@joeykelly.net
> >> <mailto:joey@joeykelly.net>> wrote:
> >>
> >> On Sat April 10 2010 1:29 pm, Petri Laihonen wrote:
> >>
> >> > On Sat, Apr 10, 2010 at 1:13 PM, Joey Kelly <joey@joeykelly.net
> >> <mailto:joey@joeykelly.net>> wrote:
> >> > > On Sat April 10 2010 1...
> >>
> >> OK, let me be less cryptic.
> >>
> >> RAID5 with 3 drives, or RAID10 with two... fine, lose one drive,
> >> you're still
> >> OK. Forget I even said anything.
> >>
> >> BUT... I do have to step in and complain loudly about software RAID.
> >> If you
> >> don't care about your data, feel free to set up software RAID.
> >>
> >> The same thing goes for Fake RAID. If you like your data and want to
> >> keep it,
> >> get a real controller.
>
> --
> Dissent is patriotic, remember?
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Received on 04/10/10