Title:
MAGNETIC RECORDER AND SERVO INFORMATION RECORDER
Document Type and Number:
Japanese Patent JP3784567
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To record a servo pattern not exceeding an erase area limit and improve the performance of a magnetic disk drive by permitting the existing of an unusable track area equivalent to one to several tracks at a place where the skew angle of a magnetic recording medium is a prescribed angle.
SOLUTION: A servo pattern is recorded once in both a negative skew angle area 22 and a positive skew area 23 that are bounded by tracks 21 providing a skew angle of 0 degree in a magnetic disk 20. A magnetic head 24 starts recording of the servo pattern to the area 22 (23) from an outermost circumference (innermost circumference) of the magnetic disk 20 up to the tracks 21 and leaves track areas around the tracks 21, to which no servo pattern is recorded. Thus, the magnetic disk drive can process the magnetic disk 20 so that the magnetic disk 20 has a physical gap track area where no servo area is in existence and a logical gap track area that allows no substantial recording/ reproduction of data to data track areas around track areas providing a skew of 0 degree.
Inventors:
Akagi Kyo
Application Number:
JP7376699A
Publication Date:
June 14, 2006
Filing Date:
March 18, 1999
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G11B5/596; G11B21/10; (IPC1-7): G11B21/10; G11B5/596
Domestic Patent References:
| JP10055501A | ||||
| JP9219075A | ||||
| JP5225730A | ||||
| JP6236630A | ||||
| JP63064812B1 |
Attorney, Agent or Firm:
Kenjiro Take