Elements of RAID 10 protection

This topic describes and illustrates RAID 10 protection.

The following diagram illustrates the elements of a parity set that contains two disk units. Each parity set begins with a virtual IOP, based in software, that is attached to an IOA, which contains the write cache. The IOA transmits read and write signals to the attached disk units.

Each lettered element provides the name for a particular data stripe.

The associated number indicates the copies of the data.

The IOA provides the stripe allocation size and positions on each unit in the parity set.