A customer has a Power Systems server with storage attached in two EXP24 expansion units. Each EXP24 is populated with 10 disks and is attached to its own SAS RAID adapter. The usable storage is…

A customer has a Power Systems server with storage attached in two EXP24 expansion units. Each EXP24 is populated with 10 disks and is attached to its own SAS RAID adapter. The usable storage is approximately 80% full across the 20 units and currently uses RAID-5 for disk protection. The customer is concerned about the time required between a drive failure and when disk protection is restored. Which of the following should the customer consider to minimize the recovery time and minimize additional hardware costs?