Method for correcting a mounting position of a disk device on a rack

A method for correcting mounting position of a disk device on a rack, the method comprising:

• performing a normal seek to position a head of the disk device above a target position on a disk;
• determining that the normal seek has failed;
• performing an excitation seek that causes a position of a base supporting the disk to move and reposition the disk;
• and
• performing a low-speed seek to position the head of the disk device above the target position on the disk, the low-speed seek being carried out at a slower speed than the normal seek,
• wherein the excitation seek is performed a predetermined number of times before performing the low-speed seek.

A method for correcting a mounting position of a disk device on a rack, the method comprising:

• performing a normal seek to position a head of the disk device above a target position on a disk;
• determining that the normal seek has failed;
• determining whether or not a shock event is recorded;
• if the shock event is recorded,
• performing an excitation seek that causes a position of a base supporting the disk to move and reposition the disk,
• clearing the shock event, and
• performing a low-speed seek to position the head of the disk device above the target position on the disk, the low-speed seek being carried out at a slower speed than the normal seek, and
• tracking a number of times an attempt to position the head of the disk device above the target position on the disk has failed, wherein:
• responsive to determining that the failed number of times is a first predetermined number of times and the shock event is recorded, performing the excitation seek in an outer-to-inner direction of the disk, and
• responsive to determining that the failed number of times is a second predetermined number of times and the shock event is recorded, performing the excitation seek in an inner-to-outer direction of the disk.

A magnetic disk device comprising:

• a magnetic disk;
• a magnetic head;
• a carriage arm supporting the magnetic head;
• a voice coil motor configured to drive the carriage arm to position the magnetic head above a recording surface of the magnetic disk;
• a base supporting the magnetic disk, the voice coil motor, and the carriage arm;
• and
• a control unit configured to control a current to the voice coil motor to be supplied with a first current profile during a normal seek and with a second current profile during an excitation seek that causes a position of the base to move and reposition the disk.