Latency
1. The time between the making of an I/O request and completion of the request’s execution.
2. Short for rotational latency, the time between the completion of a seek and the instant of arrival of the first block of data to be transferred at the disk’s read/write head.
Logical Drive
The logical devices presented to the operating system. System drives are presented as available disk drives, each with a capacity specified by the Mylex RAID controller. See also Storage Device.