The time for the start of the required sector on a disk to appear underneath the read/write head. The worst case is where it has just passed the head when the request is received. For a disk drive with N heads per surface, rotating at R revolutions per minute, the average rotational latency will be L = 30/NR seconds. Rotational latency is one component of access time.

In addition suitable contents:
[ = ] [ access time ] [ ad ] [ ag ] [ al ] [ am ] [ app ] [ ar ] [ arc ] [ as ] [ at ] [ av ] [ b ] [ be ] [ ca ] [ case ] [ cc ] [ ch ] [ co ] [ com ] [ component ] [ con ] [ cy ] [ de ] [ disk ] [ disk drive ] [ du ] [ ec ] [ ed ] [ er ] [ era ] [ es ] [ fi ] [ file ] [ fo ] [ for ] [ ge ] [ h ] [ hr ] [ id ] [ il ] [ in ] [ io ] [ ir ] [ is ] [ it ] [ la ] [ latency ] [ Lex ] [ lu ] [ mo ] [ mod ] [ module ] [ mp ] [ N ] [ na ] [ nc ] [ ne ] [ ng ] [ ns ] [ nu ] [ om ] [ pa ] [ pe ] [ ph ] [ query ] [ ques ] [ rc ] [ re ] [ revolutions per minute ] [ ro ] [ se ] [ sk ] [ st ] [ su ] [ T ] [ tar ] [ th ] [ to ] [ us ] [ ve ] [ write ]