US 11,869,547 B2
Magnetic disk device, RW parameter adjustment method of the magnetic disk device and RW parameter adjustment device
Daisuke Watanabe, Yokohama Kanagawa (JP); Takuya Maeda, Kawasaki Kanagawa (JP); Masaya Ohtake, Fujisawa Kanagawa (JP); Takeshi Sudo, Yokohama Kanagawa (JP); and Ryuichi Sato, 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 Sep. 6, 2022, as Appl. No. 17/903,911.
Claims priority of application No. 2022-042712 (JP), filed on Mar. 17, 2022.
Prior Publication US 2023/0298620 A1, Sep. 21, 2023
Int. Cl. G11B 5/09 (2006.01); G11B 27/36 (2006.01); G11B 5/012 (2006.01)
CPC G11B 5/012 (2013.01) 12 Claims
OG exemplary drawing
 
1. A read and write (RW) parameter adjustment method of a magnetic disk device, the RW parameter adjustment method comprising:
performing a pre-registration process of a magnetic disk device for testing, the pre-registration process including changing conditions of a plurality of RW parameters related to read and write to determine a capacity and characteristics for each of various heads of the magnetic disk device for testing to measure the characteristics and creating, for each of the heads, a database in which the measured characteristics are registered; and
performing an adjustment process of a magnetic disk device to be adjusted, the adjustment process including changing the conditions of the RW parameters for each of heads of the magnetic disk device to be adjusted to measure characteristics, searching the database created for each of the heads for a database having similar characteristics, and setting the capacity and characteristics in an appropriate balance among round-robin conditions by estimation of a neural network computer based on the similar characteristics of the database obtained by the searching.