We try to put no more than 3 LT02s on an HBA port.   

I see your running a V890 which has faster CPUs but is the same as
the V880.  

Do you see the dual cores helping with Network traffic load (presuming
your doing network based backups)?  

I would think your seeing PCI bus limit of this box;  you have 2 33Mhz
buses and 1 66Mhz bus to work with.   We've found the best config (for
network backups) is to have the gigabits on the 66Mhz bus.  That leaves,
sadly, 2 33Mhz buses for the HBAs..but one HBA can eat a 33Mhz bus.

Robert Maiello
Pioneer Data Systems


On Wed, 22 Mar 2006 08:37:52 -0500, Bradley Todd <bradleyt AT DISCOVERY.CO DOT 
ZA> 
wrote:

>Hi All,
>
>Just a quick question. We are running LTO2 drives in our environment and
>experiencing slight degredation in performance.
>
>What is the recommended fan out ratio per 2GB HBA to achieve best
>performance on our drives.
>
>Current Config:
>
>ADIC I2000 14xLTO2 drives 4xI/O Blades
>Sun Fire V890 8x1.2GHz dual core CPU 4xQLA2300 HBA's
>
>Thanks in advance.
>
>Bradley

>=========================================================================

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