text: **Real-time Compression**
  Real-time Compression is an IBM integrated software function for storage space efficiency. 
  The RACE engine compresses data on volumes in real time with minimal effect on 
  performance. 
  
  **Redundant Array of Independent Disks**
  RAID refers to two or more physical disk drives that are combined in an array in a certain way, 
  which incorporates a RAID level for failure protection or better performance. The most 
  common RAID levels are 0, 1, 5, 6, and 10. Some storage administrators refer to the RAID 
  group as TRAID - Traditional RAID. 
  
  **RAID 0**
  RAID 0 is a data striping technique that is used across an array and no data protection is 
  provided. 
  
  **RAID 1**
  RAID 1 is a mirroring technique that is used on a storage array in which two or more identical 
  copies of data are maintained on separate mirrored disks. 
  
  **RAID 10**
  RAID 10 is a combination of a RAID 0 stripe that is mirrored (RAID 1). Therefore, two identical 
  copies of striped data exist, with no parity. 
  
  **RAID 5**
  RAID 5 is an array that has a data stripe, which includes a single logical parity drive. The 
  parity check data is distributed across all the disks of the array. 