Re: hardware raid 5 over raid 10

From: Peter E. Fry (pfry_at_swbell.net)
Date: 12/14/04 

Date: Tue, 14 Dec 2004 04:30:07 GMT

thomaslally wrote:
>
> Disk space is not a concern, performance and above all failover
> capacity are more important to us. I've seen plenty of posts about
> RAID 5 and RAID 10 (1 + 0)
>
> But, the people (such as silver Dell tech support)I was asking to are
> mostly suggesting me to use RAID 5, especially HARDWARE RAID 5 with hot
> spare which is not that slow compared to RAID 10, even for writing.
> What do you think?

  You need relatively impressive hardware for your RAID 5 to outperform
your stripe and mirror. But if resilience is paramount, why not
mirrored RAID 5? Some SCSI RAID controllers could do it, back when I
used 'em.
  For the most part writes are (or at least should be) hidden by the
system and controller caches, so I tend to look at read performance.
Oh, and the age-old question: "How fast do you want to spend?"

Peter E. Fry

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