HP EliteBook 2540p Notebook PC - Manual (Page 85)

Using RAID (select models only)
RAID (Redundant Array of Independent Disks) is a solution to recover data in the event of drive failure.
Your computer includes a simple RAID solution that protects data on a Serial ATA (SATA) disk drive in
case of drive failure or virus attacks. HP's RAID solution also benefits computer users who frequently
work with large files and want to improve storage performance of their computer.
For additional information about RAID, refer to the RAID user guide in Help and Support.
Using RAID (select models only) 73