START_TIME | 
TIMESTAMP(6) | 
  | 
Start time of the most recent I/O calibration | 
END_TIME | 
TIMESTAMP(6) | 
  | 
End time of the most recent I/O calibration | 
MAX_IOPS | 
NUMBER | 
  | 
Maximum number of data block read requests that can be sustained per second | 
MAX_MBPS | 
NUMBER | 
  | 
Maximum megabytes per second of maximum-sized read requests that can be sustained | 
MAX_PMBPS | 
NUMBER | 
  | 
Maximum megabytes per second of large I/O requests that can be sustained by a single process | 
LATENCY | 
NUMBER | 
  | 
Latency for data block read requests | 
NUM_PHYSICAL_DISKS | 
NUMBER | 
  | 
Number of physical disks in the storage subsystem (as specified by the user) |