A method of manufacturing a disk drive and a disk drive where the width of the
read element and the width of the write element are both measured at servo-writing
time and the track pitch of the disk drive is set on the basis of those measurements.
Disk drives with superior head width combinations are servo-written with a narrower
track pitch in order to have a higher storage capacity. Disk drives with inferior
head width combinations are detected before servo-writing so that the disk drive
may be servo-written with wider track pitch rather than with a nominal track pitch
that results in a subsequent drive failure during initial burn-in (IBI). The heads
are used more efficiently in that heads that are more capable are used to their
ability and less capable heads that would otherwise be disposed of are used at all.