US 12,283,294 B1
Magnetic disk device
Toru Watanabe, Kawasaki Kanagawa (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Electronic Devices & Storage Corporation, Tokyo (JP)
Filed by Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Electronic Devices & Storage Corporation, Tokyo (JP)
Filed on Mar. 11, 2024, as Appl. No. 18/600,867.
Claims priority of application No. 2023-216591 (JP), filed on Dec. 22, 2023.
Int. Cl. G11B 5/54 (2006.01); G11B 5/187 (2006.01); G11B 5/55 (2006.01); G11B 33/14 (2006.01)
CPC G11B 5/5565 (2013.01) [G11B 5/1871 (2013.01); G11B 2220/2516 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A magnetic disk device comprising:
a magnetic disk including a data area on/from which data can be recorded/reproduced; and
a magnetic head which records data on the data area and reproduces data from the data area, wherein
an outer edge of the data area includes first outer edge, second outer edge positioned on the further inner circumferential side of the magnetic disk relatively to the first outer edge, and third outer edges each connecting between the first outer edge and the second outer edge, and incudes concave parts made inwardly concave toward the inner circumferential side of the magnetic disk at not less than part thereof.