Re: [Xen-users] Setting up XEN domU causes RAID5 to fail?

[Rudi Ahlers <Rudi@xxxxxxxxxxx>]

On Mon, Sep 17, 2012 at 9:46 AM, Marc Tousignant <myrdhn@xxxxxxxxx> wrote:
> RAID1+0 is also a no go due to loss of space, and uselessness. If you want
> speed and redundancy and have the drives for RAID1+0, just go with RAID6
> I'd lose too much space with RAID6, I have plans for all ~1.8TB, the loss of
> ~500GB would be too much of a hit.
>

RAID5 with no spare drive (i.e. another 500GB loss) has 0 redundancy,
and rebuild on RAID5 is often too high for production. If this is what
caused your problems, then RAID6 / RAID10 would be better since it
could sustain the high IO demands.

a single 2TB drive gives no redundancy either, but could yield
slightly better IO since it won't need to "rebuild' the parity while
installing Windows.



> I do have a second machine running XEN with software RAID1 and hardware
> RAID5 without issues. The drives in this config are both physical and file
> based. No issues and I have been running for over 2 years moving from 3 all
> the way to 4 without incident.
>
> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxx
> [mailto:xen-users-bounces@xxxxxxxxxxxxx] On Behalf Of Rudi Ahlers
> Sent: Monday, September 17, 2012 2:57 AM
> To: Marc Tousignant
> Cc: xen-users@xxxxxxxxxxxxx; Tony Lill
> Subject: Re: [Xen-users] Setting up XEN domU causes RAID5 to fail?
>
> On Mon, Sep 17, 2012 at 4:55 AM, Marc Tousignant <myrdhn@xxxxxxxxx> wrote:
>> Maybe that is my issue. I'll ask one of my coworkers if he can
>> misplace a 2TB drive and I can eliminate the RAID. I had a few 500GB
>> drives laying around and decided to repurpose them.
>>
>> MarcT
>>
>>
>
>
>
>
> Have you tried doing this with RAID 6 or RAID 10 instead?
>
>
>
> --
> Kind Regards
> Rudi Ahlers
> SoftDux
>
> Website: http://www.SoftDux.com
> Technical Blog: http://Blog.SoftDux.com
> Cell: 082 554 7532
> Fax: 086 268 8492
>
> _______________________________________________
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>



-- 
Kind Regards
Rudi Ahlers
SoftDux

Website: http://www.SoftDux.com
Technical Blog: http://Blog.SoftDux.com
Cell: 082 554 7532
Fax: 086 268 8492

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