Patent ID: 7362535

Claim:
A magnetic disk drive having a plurality of servo sectors discretely arrayed along a circumferential direction thereof and a plurality of data areas each provided between adjoining servo sectors and including a plurality of data sectors, said magnetic disk drive comprising: a head/slider having a write head for writing user data in said data sector formed thereon; a head support mechanism including a suspension assembly for supporting said head/slider; a vibration sensor attached to said suspension assembly and configured to detect vibrations of the head/slider upon contact with a projection on a disk surface; a vibration output generating section configured to generate an abnormal vibration signal based on a vibration signal received from said vibration sensor during a write operation; and a control section configured to control said magnetic disk drive so that an operation for writing said user data is interrupted, during the write operation for one track, at a data sector in response to said abnormal vibration signal and then restarted from the data sector at which said write operation has been interrupted when the data sector reaches a position of said write head in association with rotation of said magnetic disk.