Seek details

Head switches comparable to short seeks
May also require head adjustment
Settles take longer for writes than reads
Disk keeps table of pivot motor power
Maps seek distance to power and time
Disk interpolates over entries in table
Table set by periodic ``thermal recalibration''
~500 ms recalibration every ~25 min, bad for AV
``Average seek time'' quoted can be many things
Time to seek 1/3 disk, 1/3 time to seek whole disk,
                 Average time of all seek seeks or seek distances