[NTLUG:Discuss] what IS the fine line between RAID 0+1 and RAID10

[Robert Pearson]

On 5/24/07, Richard Geoffrion <ntlug at rain4us.net> wrote:
> So what fundamental piece of information am I missing that allows me to
> understand why RAID-10 is different from RAID 0+1?  They both seem to
> LOOK the same according to http://www.acnc.com/raid.html but yet the are
> supposedly functionally different?
>
> I'm missing a concept.  What is it?
>
> What would one call a setup where two disks are SPANNED together
>
> DiskA
>   +
> DiskB
> =====
> Total disk space
>
>
> .and then where each of the disks have a disk that mirrors it..
>
> DiskA = Mirrored_DiskA
>       +
> DiskB = Mirrored_DiskA
> ====================
> Total disk space
>
>
> That REALLY looks like a set of RAID-0 drives were just mirrored a la
> RAID-1.
>
> --
> Richard


All the replies are excellent and "Right On!"
An excellent summary is at:
"RAID 1+0 is the Cadillac of RAID"
http://blogs.zdnet.com/storage/?p=131
[post excerpt]
"A 4-disk RAID 5 was about 50% faster than a 4-disk RAID 1+0"