JPS63251963A - Substitutive recording section managing system - Google Patents

Abstract

PURPOSE:To shorten the moving time of a head mechanism which is linked from a fault recording section and performs reading and writing operations from and in a substitutive recording section, by forming the substitutive recording section on a recording medium as plural continuous individual areas. CONSTITUTION:This system is equipped with a recording medium 5 having an ordinary recording section 1 and substitutive recording section 2, movable head mechanism 3 which can read and write information from and on the recording medium 5, and rotating mechanism 4 which rotates the medium 5 and a fault recording section above the ordinary recording section 1 caused to substitute for the section 1. The substitutive recording section 2 is provided in the form of plural continuous individual area on the recording medium 5 and a means which selects the substitutive recording area 2 for making the moving time of the head mechanism 3 shortest is provided. Therefore, the accessing time to the recording medium 5 can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an alternative recording section management method for a recording medium having an alternative recording section.

Conventional technology Conventionally, in this plum alternative recording department management method, the recording medium as shown in Figure 1! is composed of a single continuous normal recording section l and a single continuous alternative recording section ko. All failure recording sections on one normal recording section l are substituted on a single continuous alternative recording section a, and one normal recording section is formed. Reading and writing operations to the failure record section on part l are first accessed to the failure record part on normal record part l, and from there are performed to the alternative record part on the linked alternate record part. was.

Problems to be Solved by the Invention However, in the above-mentioned conventional alternative recording section management system, all faulty records on one normal recording section are substituted on a single continuous alternative recording section. Reading and writing operations to the section first access the fault record section on the normal record section, and then perform the access to the substitute section on the linked substitute record section. If the department and the alternate recording department are separated.

Since the head mechanism moves from the outer circumference to the inner circumference, there is a drawback that the moving time of the head mechanism becomes long.

Means for Solving the Problems In order to achieve the above object, an alternative recording section management system according to the present invention includes: 1 a recording medium having a normal recording section and an alternative recording section; This is an alternative recording unit management system that has a movable head mechanism that enables writing operations and a rotation mechanism that rotates the medium, and replaces one normal recording unit with four recording units. The present invention is characterized in that it includes a continuous area as an alternative recording section, and includes means for selecting an alternative recording section that minimizes the movement time of the head mechanism, thereby speeding up access time to the recording medium.

Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

Referring to FIG. 7, in the present invention, the recording medium S is composed of a single continuous normal recording section l and a plurality of individual continuous alternative recording sections.

If a failure occurs in the normal recording section f & on the inner circumference side, it will be replaced with the alternative recording section i on the inner circumference side, and if a failure occurs in the normal recording section on the outer circumference side, the alternative recording section on the outer circumference side will replace it. Alternative corner 1
11rIl- is performed.

FIG. 83 is a conceptual diagram when the present invention is applied to an air outlet disk device. In Figure 3, the recording medium is composed of a normal recording section l consisting of normally used tracks and an alternative recording/edge section consisting of alternative tracks on the inner and outer circumference sides.

Figure D is a flowchart of the alternative process when a faulty track occurs in this embodiment, and Figure 1 explains which alternative track to use, the inner track or the outer track I, when a faulty track occurs. are doing.

Referring to Figure q, track X on cylinder number I
So 4-i! If F occurs, determine the usage status of alternative trucks on the inner and outer sides of the trench.

If there is an unused alternative track on only one of the tracks, it is determined that track X will be replaced with the alternative track of that alternative recording section. If there is no substitute truck for both of the unused trucks, substitution will not be possible.

If there are unused alternative tracks on both the inner and outer circumferential sides, the next used alternative track A on the inner circumferential side of cylinder number a and the next used substitute track A on the inner circumferential side of cylinder number a from the faulty track X of cylinder number The cylinder distance to the alternative truck B is calculated, and it is determined to use the alternative truck closer to the faulty truck X. After the determination is made, the address of the OK alternative track is written in the record of the faulty track, thereby linking the faulty track to the alternative track. This allows access to an alternative track when accessing a failed track.

DETAILED DESCRIPTION OF THE INVENTION According to one aspect of the present invention, reading operations from a failed recording section to a linked alternate recording section and The effect of shortening the moving time of the head mechanism during a writing operation can be obtained.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram showing an embodiment of an alternative recording section management method according to the present invention, Fig. 1 is a diagram of a conventional alternative recording section management method, and Fig. 3 is a diagram showing an embodiment of an alternative recording section management method according to the present invention. FIG. 4 is a flowchart showing an example of the operation of the alternative track control method according to the present invention. l... Normal recording section, K... Alternative recording section, 3... Head mechanism, 41... Medium rotation mechanism,! ...Recording media patent applicant NEC Corporation Representative Patent attorney Yutabe Kumagai Figure 4

Claims (1)

[Claims] A recording medium having a normal recording section and an alternative recording section, a movable head mechanism that enables reading and writing operations to the recording medium, and a rotation mechanism that rotates the medium, and a failure record on the normal recording section. The alternative recording part management method includes a plurality of individual consecutive areas on a recording medium as alternative recording parts, and means for selecting an alternative recording part that minimizes the movement time of the head mechanism. , an alternative recording unit management method characterized by speeding up access time to a recording medium.