Claims
- 1. A disk recording and reproducing apparatus comprising:a recording disk having a plurality of tracks; a disk driving section which-drives the recording disk; a dual head including a recording head which records data on the recording disk, and a reading head which reads data from the recording disk; a dual head driving section which drives the dual head; a deviation value recorder which records, on any of the plurality of tracks, a value of a deviation from a center of a core; a position determiner which determines a position of the reading head based on the deviation value; an information recorder which records, on any of the plurality of tracks, information identifying a position of the dual head corresponding to the position of the reading head determined by the position determiner; a calculator which reads, using the reading head, the information recorded by the information recorder, and calculates a value of a positional deviation between the recording head and the reading head based on the information read using the reading head; and a positional deviation value recorder which records the positional deviation value calculated by the calculator on the recording disk.
- 2. A disk recording and reproducing apparatus according to claim 1, wherein the calculator and the positional deviation value recorder operate when the disk recording and reproducing apparatus records a servo pattern on the recording disk.
- 3. A disk recording and reproducing apparatus according to claim 2, wherein the positional deviation value includes information regarding a recording frequency; andwherein the recording frequency is equal to a servo frequency.
- 4. A disk recording and reproducing apparatus according to claim 3, wherein the positional deviation value further includes information regarding a number of a track subjected to a deviation.
Priority Claims (3)
Number |
Date |
Country |
Kind |
4-257781 |
Sep 1992 |
JP |
|
5-014781 |
Feb 1993 |
JP |
|
5-118593 |
May 1993 |
JP |
|
CROSS-REFERENCES TO RELATED APPLICATIONS
This application is a continuation of application Ser. No. 09/641,772 filed on Aug. 21, 2000, now U.S. Pat. No. 6,236,528, which is a continuation of application Ser. No. 08/858,460 filed on May 19, 1997, now U.S. Pat. No. 6,108,158, which is a continuation of application Ser. No. 08/128,072 filed on Sep. 28, 1993, now U.S. Pat. No. 5,715,105. The contents of application Ser. Nos. 09/641,772, 08/858,460, and 08/128,072 are incorporated herein by reference in their entirety.
US Referenced Citations (7)
Foreign Referenced Citations (5)
Number |
Date |
Country |
63-86160 |
Apr 1988 |
JP |
63-142513 |
Jun 1988 |
JP |
63-308772 |
Dec 1988 |
JP |
3-160675 |
Jul 1991 |
JP |
3-254953 |
Oct 1991 |
JP |
Non-Patent Literature Citations (1)
Entry |
Nikkei Electronics, No. 537, Sep. 30, 1991, pp. 77-106 (in Japanese). |
Continuations (3)
|
Number |
Date |
Country |
Parent |
09/641772 |
Aug 2000 |
US |
Child |
09/838127 |
|
US |
Parent |
08/858460 |
May 1997 |
US |
Child |
09/641772 |
|
US |
Parent |
08/128072 |
Sep 1993 |
US |
Child |
08/858460 |
|
US |