Re: RAID-5 vs. Disk Mirroring

I disagree we have seen RAID 5 have more effect on performance than shadowing.

Steve Lemme
DBA / Systems Manager
MOTOROLA In article <4e6fus$7i7_at_crchh327.rich.bnr.ca>, brand_at_bnr.ca (Brand Hilton) wrote:

> In article <4e5man$28d_at_newsbf02.news.aol.com>, BBAP <bbap_at_aol.com> wrote:
> >Does anyone have experience to share on either RAID-5 or Disk Mirroring.
> >We are trying to make a decision on a direction. The concern is which
> >method will ensure that data will be there (no loss is permited), while
> >not comprimising performance. Cost is not a consideration.
> >
> >We are looking at HP, SUN, IBM hardware solutions.
> >
> >Thank you in advance for your answers...
> >
> >Bernie Lewis
> >bbap_at_aol.com
 

>
> Seriously, RAID-5 is a better system than disk mirroring (which is
> RAID-1, if I remember correctly). You should see better performance
> out of a RAID-5 system than you would out of a single disk or a RAID-1
> system. Think about it. Data transfer rate from a disk is limited by
> the spindle speed of the disk. If you have one byte spread across 8
 etc...
>
> P.S., Where should I send the bill for my consultation fee? :-)
 

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