Thermal recalibration is a procedure that was at one time commonly employed to correct
for shifts in the positions of tracks on drive surfaces as they heated up. It is discussed
in this section.
On some older drives, thermal recalibration caused performance problems due to
unexpected interruptions for the recalibration to be performed. These primarily affected
transfer performance, particularly for users manipulating large files. To combat this
problem, manufacturers created special (expensive) drives that did not use thermal
recalibration. Fortunately today, this is no longer an issue, since recalibration is not
required with today's drives the way it once was.
The most important thing to remember about thermal recalibration today in terms of
performance is: don't pay extra for a drive with a big label on it that says "no
thermal recalibration!" 
Next: Hard
Disk External Performance Factors
