Mailinglist Archive: opensuse (2359 mails)

[Arun Khan <knura@xxxxxxxxx>]

Hi Manfred,

On Sunday 22 Mar 2009, Manfred Hollstein wrote:

> On Sun, 22 Mar 2009, 13:37:37 +0100, Arun Khan wrote:
> > Has anyone done a 0+1 SW RAID?
> >
> > I am assembling an entry level server Intel s3000ah board, xeon
> > 3220 2.4GHz, 8GB RAM and 4*160GB SATA II hdds.  sda and sdb on one
> > controller; sdc and sdd on an another controller.
> >
> > I am thinking of configuring 2 disks (sda1+sdc1) in a RAID0 setup
> > and then mirror this RAID device on the other 2 disks (sdb1+sdd1).
> >
> > Has anyone done such a setup using sw raid in openSUSE?
>
> Yes, I did, and it works great in general; I just configured the
> RAID0 on top of two RAID1 devices (because I _think_ it might be
> easier to deal with in case a disk goes havoc). As I'm a heavy
> multi-boot user, I tried to install a different version (e.g.

.... snip ...

Thanks much for sharing your experience on nested raid.  I found the 
following discussion also very useful.

<http://en.wikipedia.org/wiki/Nested_RAID_levels>

There is no doubt, it needs to be planned out and then implemented.

The main motivation for considering RAID0, I want to implement VMs with 
the virtual disks on RAID to take advantage of striping.

I am wondering if is there any significant advantage of doing RAID 1+0 
(4 disks) v/s RAID5 (3 disks).

Thanks again.

-- Arun Khan


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