Magnetic disk apparatus and method for accessing data sector
AssigneeKabushiki Kaisha Toshiba
InventorsTakashi MATSUO, Kenji YOSHIDA, Kazuya TAKADA, Yosuke KONDO
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Abstract
A magnetic disk apparatus includes a disk and a controller. The disk includes a plurality of tracks including a first track and a second track that is different from the first track. A plurality of data sectors are located on the tracks. The data sectors include short data sectors and long data sectors, each including a plurality of short data sectors. If the controller accesses a long data sector located at an end of the first track, the controller first accesses a short data sector of the long data sector at the end of the first track, and then accesses a short data sector of the long data sector at the beginning of the second track.
Claims20
A magnetic disk apparatus comprising:
- a disk comprising a plurality of tracks including a first track and a second track that is different from the first track, a plurality of data sectors being located on the plurality of tracks, the data sectors including short data sectors and long data sectors, each including a plurality of short data sectors;
- and
- a controller configured to access the data sectors using a head,
- wherein, when the controller accesses a long data sector located at an end of the first track, the controller first accesses a short data sector of the long data sector at the end of the first track, and then accesses a short data sector of the long data sector at the beginning of the second track.
A method, in a magnetic disk apparatus comprising a disk, for accessing the disk using a head, the disk comprising a plurality of tracks including a first track and a second track that is different from the first track, a plurality of data sectors being located on the tracks, the data sectors including short data sectors and long data sectors, each including a plurality of short data sectors, the method comprising:
- accessing a short data sector of a long data sector at the end of the first track;
- and
- accessing a short data sector of the long data sector at the beginning of the second track.
A magnetic disk apparatus comprising:
- a disk comprising a plurality of tracks including a first track and a second track that is different from the first track, a plurality of data sectors being located on the plurality of tracks, the data sectors including short data sectors and long data sectors, each including a plurality of short data sectors;
- a CPU which controls access to the disk using a head and executes a seek operation on the head to move the head;
- and
- a disk controller which accesses the disk under control of the CPU in units of a data sector, wherein while a long data sector located at an end of the first track is being accessed, the disk controller generates an interrupt to the CPU that causes the CPU to execute a seek operation on the head to move the head to the second track.
Dependencies are inferred from the claim text.