We are planning to purchase X4500, for disk based backup, with 1TB disks fully 
loaded, do you have any suggestions/recommendation to go with 1TB disk or 500GB 
disks based on the performance. Also Sun also has X4540 which has AMD Quad Core 
versus Dual Core Dual AMD processors in X4500, any performance difference 
between these two processors. 

Is it better to create 1 ZFS pool and create multiple file system or to create 
multiple zfs pools, so that each pool will have dedicated disks, and then 
create file system in that to create adv_file type device.

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