KR20130007271A - Method for controlling write operation and storage device using the same - Google Patents
Method for controlling write operation and storage device using the same Download PDFInfo
- Publication number
- KR20130007271A KR20130007271A KR1020110064963A KR20110064963A KR20130007271A KR 20130007271 A KR20130007271 A KR 20130007271A KR 1020110064963 A KR1020110064963 A KR 1020110064963A KR 20110064963 A KR20110064963 A KR 20110064963A KR 20130007271 A KR20130007271 A KR 20130007271A
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- KR
- South Korea
- Prior art keywords
- compensation value
- repeatable runout
- write
- write operation
- storage medium
- Prior art date
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59627—Aligning for runout, eccentricity or offset compensation
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
Description
The present invention relates to a write operation control method and a storage device, and more particularly, to a write operation control method using a new Repeatable RunOut (RRO) compensation value and a storage device using the method.
A disk drive, which is one of the storage devices, contributes to the operation of a computer system by writing data to or reading data from a storage medium according to a command issued from a host device. The disk drive may normally write the data to the storage medium by performing a write retry operation when an error occurs while writing the data to the storage medium.
An object of the present invention is to provide a write operation control method for performing a write operation using a new Repeatable RunOut (RRO) compensation value.
Another object of the present invention is to provide a storage device using the write operation control method.
According to another aspect of the present invention, there is provided a method of controlling a write operation, when an error occurs while performing a write operation, performing a write retry operation, wherein the write retry operation is performed n times (n is a natural number). The method may include generating at least one repeatable runout (RRO) compensation value and performing the write operation again using the generated at least one repeatable runout compensation value.
The generating of the at least one repeatable runout compensation value may include generating the at least one repeatable runout compensation value by using a measured position error signal (PES) when the write retry operation is performed n times. It may be a step.
The generating of the at least one repeatable runout compensation value may include performing at least one repeatable runout compensation value or the write operation on at least one data sector to perform the write operation when the write retry operation is performed n times. Generating repeatable runout compensation values for the track including the data sector to be performed.
The write operation control method may further include storing the generated at least one repeatable runout compensation value in a memory.
The storing in the memory may include deleting at least one repeatable runout compensation value stored in the memory when there is no space to store the generated at least one repeatable runout compensation value in the memory. And storing the repeatable runout compensation value in the memory.
The performing of the write operation may be performed again by adjusting the position of the head using the generated repeatable runout compensation value to perform the write operation again.
The repeatable runout compensation value may be a repeatable runout correction code (RCC).
According to another aspect of the present invention, there is provided a storage device including: a storage medium in which data is stored; a storage medium interface for writing data to or reading data from the storage medium; And a processor configured to generate at least one repeatable runout (RRO) compensation value when the write retry operation is performed n times (n is a natural number) during the write operation, wherein the processor is configured to generate the at least one. The storage medium interface may be controlled to perform a write operation again after compensating for a position error signal (PES) by using a repeatable runout compensation value of.
The processor may generate the at least one repeatable runout compensation value using the uncompensated position error signal.
According to an exemplary embodiment of the present invention, a method of controlling a write operation and a storage device using the method include a repeatable runout that cannot be compensated using a repeatable runout correction code (RCC) stored on a disk. (RRO: Repeatable RunOut) Compensates the component to perform the normal write operation. That is, the write operation control method and the storage device using the method according to an embodiment of the inventive concept compensate for the position error signal when a high position error signal (PES) is measured and write normally. There is an advantage to performing the operation.
BRIEF DESCRIPTION OF THE DRAWINGS In order to better understand the drawings cited in the detailed description of the invention, a brief description of each drawing is provided.
1 is a block diagram of a computer system according to an exemplary embodiment of the inventive concept.
FIG. 2 is a software operating system diagram of the storage device shown in FIG. 1.
3 is a plan view of a head disk assembly of a disk drive according to an embodiment of the inventive concept.
4 is a diagram illustrating an electrical circuit configuration of a disk drive according to an embodiment of the storage device of FIG. 1.
5 is a diagram illustrating a sector structure of one track in a disk, which is an embodiment of a storage medium to which the present invention can be applied.
FIG. 6 is a diagram illustrating a structure of the servo region illustrated in FIG. 5.
7 is a block diagram of a storage device according to an example embodiment of the inventive concept.
8 is a flowchart illustrating a write operation control method according to an embodiment of the inventive concept.
9 is a flowchart illustrating a write operation control method according to another exemplary embodiment of the inventive concept.
10 is a flowchart illustrating a write operation control method according to another exemplary embodiment of the inventive concept.
11 is a flowchart illustrating a write operation control method according to another exemplary embodiment of the inventive concept.
FIG. 12 is a diagram illustrating an embodiment of the
FIG. 13A is a diagram illustrating an embodiment of a table stored in the
FIG. 13B is a diagram illustrating another embodiment of a table stored in the
In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.
1 is a block diagram of a
Referring to FIG. 1, a
In detail, the
The
The
First, the constituent means of the
The
Then, the
The
The
3 is a plan view of a
Referring to FIG. 3, the
The
The information is typically stored in an annular track of the
5 is a diagram illustrating a sector structure of one track in a disk, which is an embodiment of a storage medium to which the present invention can be applied.
As illustrated in FIG. 5, one servo sector section T may include a servo area S and a data area, and the data area may include a plurality of data sectors D. Of course, a single data sector D may be included in one servo sector section. The data sector D may also be referred to as a sector. In the servo area S, signals as shown in FIG. 6 are recorded in detail.
FIG. 6 is a diagram illustrating a structure of the servo region S shown in FIG. 5.
As shown in FIG. 6, the servo region S includes a
The
The servo
The
The repeatable runout (RRO) component and the non-repeatable runout (NRRO) component may be generated when a hard disk drive follows a track. The repeatable runout component may occur for disc warpage, bending of the disc surface, placement of the disc relative to the spindle center, incomplete spindle motor bearings, or harmonics during rotation. The non-repeatable runout component may be caused by random perturbation and longation due to irregularities in the bearings. In order to compensate for the repeatable runout component, the repeatable runout correction code RCC may be recorded in the servo area S during the manufacturing process of the hard disk drive. That is, when the hard disk drive writes data, the write operation may be performed while compensating for the repeatable runout component using the repeatable runout correction code RCC recorded in the servo area S of the disk.
The
The
Referring back to FIG. 1, the
The
The
Next, a software operating system of a hard disk drive, which is an example of a storage device, will be described with reference to FIG. 2. 2 is a software operating system diagram of the
As illustrated in FIG. 2, a plurality of
The
A plurality of code
The
The
RTOS (Real Time Operating System) 110A is a real-time operating system program, a multi-program operating system using a disk. Depending on the task, multi-processing is performed in real time in the foreground with high priority, and batch processing is performed in the background with low priority. Then, the code object from the disk is loaded and the code object is unloaded to the disk.
RTOS (Real Time Operating System) 110A is a Code Object Management Unit (COMU) 110-1, Code Object Loader (COL, 110-2), Memory Handler (Memory Handler; MH, 110-3), the channel control module (CCM) 110-4 and the servo control module (SCM) 110-5 are managed to execute a task according to the requested command. The
In detail, the
The COMU 110-1 stores the positional information where the code objects are recorded, and performs a process of arbitrating the bus. It also stores information about the priority of tasks that are running. It also manages task control block (TCB) information and stack information necessary for performing tasks on code objects.
The COL 110-2 loads the code objects stored in the
The
The MH 110-3 performs a process of writing or reading data to the
The CCM 110-4 performs channel control necessary to perform signal processing for data read and write, and the SCM 110-5 performs servo control including a head disk assembly to perform data read and write. do.
4 is a diagram illustrating an electrical circuit configuration of the
As shown in FIG. 4, the
The
The
The
In the
The
In addition, the
Next, the data read operation and the data write operation of the disk drive will be described.
In the data read mode, the disc drive amplifies in the
In the data write mode, the disk drive receives data from the host device through the
7 is a block diagram of a
The
The
The
The
The
The
The repeatable runout compensation value may be a repeatable runout correction code (RCC). The repeatable runout correction code (RCC) described with reference to FIG. 6 is information stored in a servo area of a disc in a disc drive manufacturing process, and the repeatable runout compensation value of the present invention is information generated by the
Hereinafter, a light operation control method according to various embodiments of the inventive concept will be described with reference to FIGS. 8 to 11.
8 is a flowchart illustrating a write operation control method according to an embodiment of the inventive concept.
7 and 8, when a write command is received, the
The
When the number of times of the write retry operation is performed n times, the
9 is a flowchart illustrating a write operation control method according to another exemplary embodiment of the inventive concept.
7 and 9, when a write command is received, the
The
When the number of times of the write retrain operation is performed n times, the
10 is a flowchart illustrating a write operation control method according to another exemplary embodiment of the inventive concept.
7 and 10, when a write command is received, the
The
When the number of times of performing the write retrain operation is n, the
11 is a flowchart illustrating a write operation control method according to another exemplary embodiment of the inventive concept.
7 and 11, when a write command is received, the
The
When the number of times the write retry operation is performed is n, the
For example, when a disk deformation occurs due to a high temperature or a low temperature while performing the write operation, the write operation may not be performed normally and an error may occur. In this case, the position error signal has a larger value than the conventional one, and the write operation cannot be normally performed by the conventional method. However, according to an embodiment of the inventive concept, the write operation is normally performed by compensating the position error signal using the newly generated at least one repeatable runout compensation value under the above conditions and performing a write operation. The operation can be completed.
FIG. 12 is a diagram illustrating an embodiment of the
In the following description, it is assumed that the
FIG. 13A illustrates an embodiment of a table stored in the
7 to 13B, when the write operation is performed n times, the
It is assumed that data sectors for writing data in response to the received write command are included in the data regions DR1, DR2, and DR3. When the write retry operation is performed n times, the
Alternatively, when the write retry operation is performed n times, the
As described above, when the new repeatable runout compensation values are stored in the
In an exemplary embodiment of the present invention, the write operation is performed using the newly generated repeatable runout compensation value, so the write operation is performed with the position error signal reduced. However, according to the prior art, the position error signal cannot be compensated as in the present invention. According to another conventional technology, when a write retry operation is performed a predetermined number of times, a write operation may be performed on another data sector (a spare data sector). However, according to an exemplary embodiment of the inventive concept, the seek operation for searching for another data sector is not performed as in the other prior art.
The invention can be practiced as a method, apparatus, system, or the like. When implemented in software, the constituent means of the present invention are code segments that necessarily perform the necessary work. The program or code segments may be stored in a processor readable medium. Examples of processor-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memory, erasable ROM (EROM), floppy disks, optical disks, hard disks, and the like.
As described above, optimal embodiments have been disclosed in the drawings and the specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.
Claims (10)
Generating at least one repeatable runout (RRO) compensation value when the write retry operation is performed n times (n is a natural number); and
And performing the write operation again using the generated at least one repeatable runout compensation value.
And when the write retry operation is performed n times, generating the at least one repeatable runout compensation value using a measured position error signal (PES).
Measuring the position error signal when the write retry operation is performed n times; and
Generating the at least one repeatable runout compensation value using the measured position error signal.
Measuring the position error signal; and
And generating the at least one repeatable runout compensation value by using the measured position error signal when the write retry operation is performed n times.
When the write retry operation is performed n times, at least one repeatable runout compensation value for at least one data sector to perform the write operation or repeatable runout compensation for a track including the data sector to perform the write operation. And generating values.
And storing the generated at least one repeatable runout compensation value in a memory.
If there is no space to store the generated at least one repeatable runout compensation value in the memory, deleting at least one repeatable runout compensation value stored in the memory; and
And storing the generated at least one repeatable runout compensation value in the memory.
And a repeatable runout correction code (RCC).
A storage medium interface for writing data to or reading data from the storage medium
And a processor configured to generate at least one repeatable runout (RRO) compensation value when the write retry operation is performed n times (n is a natural number) while the storage medium interface is performing the write operation.
The processor comprising:
And the storage medium interface performs a write operation again after compensating a position error signal (PES) using the generated at least one repeatable runout compensation value.
And generate the at least one repeatable runout compensation value using the uncompensated position error signal.
Priority Applications (1)
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KR1020110064963A KR20130007271A (en) | 2011-06-30 | 2011-06-30 | Method for controlling write operation and storage device using the same |
Applications Claiming Priority (1)
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KR1020110064963A KR20130007271A (en) | 2011-06-30 | 2011-06-30 | Method for controlling write operation and storage device using the same |
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KR20130007271A true KR20130007271A (en) | 2013-01-18 |
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KR1020110064963A KR20130007271A (en) | 2011-06-30 | 2011-06-30 | Method for controlling write operation and storage device using the same |
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