Choose options for your mirror component. The default options are appropriate for most situations, but you might want to specify the Read Option as:
Round Robin to evenly balance the reads across all mirrors
Geometric to allocate reads from specific ranges of disk block addresses to specific mirrors to improve read performance.
First to specify that all reads should be done from the first submirror, which helps performance only if the first submirror is substantially faster than other submirrors.
Write Options include:
Parallel to write to all submirrors simultaneously
Serial to allow writes to submirrors to be performed sequentially, which offers better security for data integrity in the event of disk failure.
Specify the Pass Number to determine the order in which this mirror will be resynchronized during a system reboot. 0 indicates not to resynchronize at all, and is only appropriate for read-only mirrors. Smaller Pass Numbers are resynchronized before larger numbers in the boot process.