what is seek time
access time
Access time
Seek time:- it is the time required to move the disk arm to th required track.During the "seek time", an actuator moves the disk heads to the disk.The seek time is the time it takes a hardware device or software program to locate a particular piece of information.latency time :-it is the time it takes for the begning of the requirement sector to reader the head. Latency is the elapsed time from the moment when a seek for confirmation that the packet has been received.Latency and bandwidth are the two factors that determine your network connection speed....Latency is a time delay between the moment something is initiated
access time
access time
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access time
Rotational latency time refers to the delay experienced while waiting for the desired sector of a rotating storage medium, such as a hard disk drive (HDD), to come under the read/write head. It is a component of access time, which also includes seek time and transfer time. The average rotational latency can be calculated as half the time it takes for one complete rotation of the disk. This latency is influenced by the rotational speed of the disk, typically measured in revolutions per minute (RPM).
Sleep latency-- The amount of time that it takes to fall asleep. Sleep latency is measured in minutes and is important in diagnosing depression.
we have seek = 10-50 ms so , average seek = (10+50) / 2 = 30ms and the access time = seek + latency = 20 + 30 = 50 ms
Latency is the time a frame or a packet takes to travel from the source to the destination.
it depends on more then rotational speed. The Rotational speed and latency time is related as follows: Latency time = (1/((Rotational Speed in RPM)/60)) * 0.5 * 1000 milli seconds