Re: 280R and A5200 question
From: Dennis Clarke (dclarke_at_blastwave.org)
Date: 06/30/04
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Date: Tue, 29 Jun 2004 21:20:53 -0400
On Tue, 29 Jun 2004, Rich Pierson wrote:
> I just finished racking and installing a new to me 280R Sunfire and an a
> 5200 with 12 discs, Solaris9 from the dvd. Six in front and 6 in back.
Good config. That should work well. I guess that you are not using an
additional controller or fibre HBA ?
> Format sees them fine plus the two internal hard drives on the sunfire.
> Everything is up and running.
> I want to make 2 raid arrays
You seem to want RAID for some reason. My only advice is "don't do that."
The A5200 does not provide a hardware RAID controller but it is an
exceptional fibre array. Simply stripe the six disks in the front and
stripe the six disks in the back. Then mirror. The performance will be
quite nice and the redundency will be okay. If your HBA fails or someone
twists the cable then you lose everything. If the A5200 fails then you
lose everything. You would do well to get two HBA's and another A5200
array chassis. Then you can mirror across the arrays and even begin to
think along the lines of multipath device access.
For now I simply suggest that you do not perform a RAID setup. The
performance is terrible. Go with a stripe with reasonable stripe depth.
Dennis
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