Re: New 525 install and disk protection

I think the consideration here is the fact that the cache on the base raid controller for the CPU is only 40mb. If Joel has one of the newer high performance controllers, they run around 1.5GB of read and write cache. This config put almost all the disk on that larger controller and therefore much better dick performance.



Urbanek, Marty wrote:

Joel,

We had a system like that before one could put the load source on RAID
(actually still running that system). The hw/sw of the last few years
allows us to have the load source on RAIDed drives. I'm not an expert on
the subject, but I think RAID would result in slightly less "wasted"
disk space. However, I think with the setup you have, you've got your
bases covered. We had problems with the mirrored load source before and
recovery was accomplished without incident.

-Marty

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date: Thu, 19 Jul 2007 20:50:47 -0400
from: "Harvell, Joel" <jbharvell@xxxxxxxxxxxx>
subject:
I am installing a new 525 system with 18 total drives. 2 drives are in
the system unit, and 16 are in the expansion unit. These are 70 gig
drives. I have set up Raid 5 on the 16 drives in the expansion unit.
I added all the drives to asp 1 and started mirroring. So the 2 drives
in the system unit are mirrored, and the 16 drives in the expansion unit
have Raid 5.

Does any one see any problems with this setup?? I have never had
Mirrored drives before.

Thanks

Joel B. Harvell