RAID and SAN tiers

[Guest]

Archived from groups: microsoft.public.win2000.file_system (More info?)

I've worked with local disk WIntel systems for years and know exactly which
RAID array configuration to use based intended disk I/O. I am being told by
EMC trained technicians that RAID requirements are negligible on EMC SANs as
EMCs tiers negate the need for convetional RAID I/O and as such RAID 5 or
RAID 10 on a large data warehouse on an EMC SAN perform just as well and that
RAID 5 is generally more preferred then any other RAID level.

Having worked with RAID for years, I smell 'mis-information' but am being
told this by several EMC technicians.

I would think that RAID array configuration and design is extremely
important regardless if one was using local disks or a SAN and I need this
information in order to configure a 5 way WIn2003 SQL cluster.

Are these EMC comments just EMC marketing hogwash or are they valids
configuraton best practices for SANs on a Windows 2000/2003 box?

 

[Guest]

Archived from groups: microsoft.public.win2000.file_system (More info?)

It doesn't seem that they are misinforming you - the storage box implements
the RAID for you and you don't typically use software RAID on top of that,
but you will probably want to figure out your performance requirements
before selecting the RAID level. RAID5 is much more economical, but you pay
on write performance. It might not be "fastest" but could be fast enough for
your application. EMC will be happy to sell you DBTuner just in case Many
high-end customers watch and tune performance all the time.

"DBADave" <DBADave@discussions.microsoft.com> wrote in message
news:056AA744-897B-4131-B562-FFFAC1B8E0DA@microsoft.com...
> I've worked with local disk WIntel systems for years and know exactly
> which
> RAID array configuration to use based intended disk I/O. I am being told
> by
> EMC trained technicians that RAID requirements are negligible on EMC SANs
> as
> EMCs tiers negate the need for convetional RAID I/O and as such RAID 5 or
> RAID 10 on a large data warehouse on an EMC SAN perform just as well and
> that
> RAID 5 is generally more preferred then any other RAID level.
>
> Having worked with RAID for years, I smell 'mis-information' but am being
> told this by several EMC technicians.
>
> I would think that RAID array configuration and design is extremely
> important regardless if one was using local disks or a SAN and I need this
> information in order to configure a 5 way WIn2003 SQL cluster.
>
> Are these EMC comments just EMC marketing hogwash or are they valids
> configuraton best practices for SANs on a Windows 2000/2003 box?
>
>
>