Hi all,
I am NOT a storage GURU, but I can vouch for the 3Ware 7850
RAID controller. I have eight 120 gig Maxtors in a RAID5 configuration
mounted as one enormous 860 gig XFS partition.
I have users writing to this filesystem via NFS from a number
of Sun, SGI, and Linux systems. I've had a few NFS related reliability
snags that I'm slowly tracking down, but have nothing but praise for the
7850 itself as far as economics/performance is concerned. It's fast
(directly comparable to a 250 Gig SCSI RAID we have attached to an
Ultra80) and simple to set up. So far, the money seems well spent.
-- Reid
Reid Fletcher, WB7CJO
Senior Systems Analyst / Unix Systems Administrator
Department of Geology and Geophysics P. O. Box 3006
University of Wyoming 1-307-766-6227
Laramie, WY 82071 Internet: Fletcher @ UWyo.Edu
Are we all roadkill on the information highway? - Jeff Greenfield
On Wed, 17 Jul 2002, Greg Freemyer wrote:
> Ben,
>
> If you can scrap together another $500, I would consider dropping those
> Promise controllers and adding a 3ware controller.
>
> As I understand it, with the Promise controller you can still only do one
> disk seek operation at a time. This eliminates the performance advantages of
> RAID.
>
> Someone please correct me if I'm wrong.
>
> With the 3ware it does the RAID in hardware and does overlapping seeks.
> (They have just changed there model numbering scheme, so I can't remember
> what the new model numbers are.)
>
> If you stick with Promise controllers, I don't know if RAID 1+ 0 will be any
> faster than RAID 5 or not. I would guess they will be almost the same speed.
> All the RAID performance descriptions I know assume your hardware supports
> overlapping seeks.
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