Methods and apparatus for controlling access to a recording disk

An apparatus for controlling access to a recording disk, comprising:

• a skew determining means for determining a skew so that a rotational delay time at the average distance of movement when a head accesses the recording disk is minimized;
• a data block arranging means for determining the position of a data block on the recording disk based on at least the determined skew;
• and
• a scheduling means for scheduling an order of a plurality of input disk access requests so that the amount of movement of the head becomes small at the time of access of the recording disk by the head, and wherein
• the head accesses the recording disk based on the results of the scheduling.

A method for controlling access to a disk, comprising the steps of:

• determining a position of a data block on the disk to minimize a rotational delay time at an average distance of movement each time the disk is accessed by a head;
• scheduling an order of a plurality of disk access requests to minimize an amount of movement of the head when the disk is accessed by the head;
• and
• accessing the disk by the head based on the result of the scheduling.

An apparatus for controlling access to a disk, comprising of:

• means for determining a position of a data block on the disk to minimize a rotational delay time at an average distance of movement each time the disk is accessed by a head;
• means for scheduling an order of a plurality of disk access requests to minimize an amount of movement of the head when the disk is accessed by the head;
• and
• means for accessing the disk by the head based on the result of the scheduling.

An apparatus for controlling access to a recording disk, comprising:

• a skew determining means for determining a skew so that a rotational delay time at the average distance of movement when a head accesses the recording disk is minimized;
• a block allocator for determining the position of a data block on the recording disk based on at least the determined skew;
• and
• a scheduler for scheduling an order of a plurality of input disk access requests so that the amount of movement of the head becomes small at the time of access of the recording disk by the head, and wherein
• the head accesses the recording disk based on the results of the scheduling.