Load Distribution

• Balance the number of disk shelves across the disk chains in your system.

• Balance the number of disk chains across the number of HBAs in your system. For example, attaching two chains to two separate HBAs will have better performance than attaching two chains to a single HBA.

• Do not mix disks with different capacities or rotation speeds within a single disk shelf.

• To maximize performance, use the maximum number of disk chains supported by the controller's SAS HBAs. For example, four SAS HBAs with eight chains and eight disk shelves will have better performance than two SAS HBAs with four chains and eight disk shelves.

• To maximize performance, do not attach more than four Oracle Storage Drive Enclosure DE2-24C, DE2-24P, or DE3-24C disk shelves to a single chain, and do not attach more than three Oracle Storage Drive Enclosure DE3-24P disk shelves to a single chain. This only applies to systems that are performance critical. The maximum of six disk shelves per chain is available for cases where capacity is preferred over performance.