KR20140111462A

KR20140111462A - Archive system using optical disc

Info

Publication number: KR20140111462A
Application number: KR1020130025623A
Authority: KR
Inventors: 김대관; 방극영
Original assignee: 주식회사 히타치엘지 데이터 스토리지 코리아
Priority date: 2013-03-11
Filing date: 2013-03-11
Publication date: 2014-09-19

Abstract

The present invention relates to an optical disk based archive system. In the archive system according to an embodiment of the present invention, a first position error for the first archive system constituted by the master transfer unit and the sample cartridge is obtained, and a second position error for the second archive system composed of the sample transfer unit and the master cartridge And a third positional error obtained with respect to the master archive system constituted by the master conveyance unit and the master conveyance unit, and for the archive system constituted by the sample conveyance unit and the sample cartridge, based on the first positional error, the second positional error, Position error can be obtained. The position error corresponds to a position error for each slot included in the cartridge, minus a third error from the sum of the first error and the second error. Accordingly, it is possible to reduce the position error of the picker robot and the cartridge in the optical disc-based archive system, to correctly pull the optical disc into the slot of the cartridge for storing the disc, or to accurately pull the optical disc from the slot.

Description

[0001] The present invention relates to an optical disc-based archive system,

The present invention relates to an optical disk based archive system, and more particularly, to an archive system for correcting a position error of a transfer mechanism of an archive library system.

As video signal processing technology and data transmission technology are developed and large display devices are developed, viewers can view high-quality contents and the need to store high-capacity contents is increasing.

In recent years, cloud services have been enabled to put data on remote servers and use data anywhere on the network, and the storage capacity that cloud services provide to individuals is also growing.

In this way, a portal providing cloud service, a broadcasting station providing a large amount of contents, a large server for storing and managing a large amount of data in a library, a government office, or a bank in which a large amount of documents must be archived and stored The need is increasing. In accordance with this necessity, an archive system that can store and retrieve a large amount of data reliably at a low cost and quickly is being launched.

Archiving system is a kind of database which maintains and maintains the relation between data and keeps the collection and data of digital information in the form of digital information. It digitizes information that may be degraded or dispersed over time, And so on. It is meaningful not to simply accumulate information, but to organize and accumulate information effectively in various ways.

Up until now, archival systems have been the mainstay of tapes as storage media. However, a tape-based archive system has the problem of high data stability but low search speed and large space. Hard disk-based archive systems are also emerging and are excellent in that they can be searched quickly, but data reliability is poor.

In recent years, an archive system using an optical disk as a storage medium has emerged. An optical disk-based archive system can search more quickly than a tape-based archive system and can store data more reliably than a hard disk-based archive system There is an advantage that the space occupied by the tape and the hard disk can be reduced.

An optical disc-based archive system includes a cartridge for storing a plurality of optical discs, an optical disc drive for recording data on the optical disc or reading data from the optical disc, and an optical disc between the cartridge and the optical disc drive A picker robot which is a transfer device for transferring is separately provided to move the optical disc taken out from the cartridge horizontally and then loaded into the optical disc drive and unloaded from the optical disc drive by reading / And then pulled into the cartridge.

The picker robot moves horizontally along guides installed between left and right cartridges to draw the optical disc into or out of a slot included in the cartridge, It can be withdrawn.

However, it is difficult to insert / withdraw the optical disc at the correct position so as not to damage the optical disc due to the deformation of the guide for guiding the picker robot or the position of the slot included in the cartridge.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above circumstances, and it is an object of the present invention to reduce a transfer error of a picker robot in an optical disc-based archive system.

It is another object of the present invention to provide a method for precisely drawing an optical disc into a slot of a cartridge for storing the disc in the optical disc based archive system or correctly extracting the optical disc from the slot.

According to an aspect of the present invention, there is provided a method for obtaining a position error in an archive system including a drive bay including an optical disk drive for recording data on an optical disk or reading data from an optical disk, A cartridge including a plurality of slots for storing an optical disk, and a transporting unit for transporting the optical disk between the optical disk drive and the cartridge by drawing or pulling the optical disk into or from the optical disk drive or cartridge A first step of obtaining a first positional error for a first archive system, which is applied to an archive system and is composed of a master transfer unit and a sample cartridge; A second step of obtaining a second positional error with respect to a second archive system constituted by the sample transferring section and the master cartridge; And a third positional error obtained with respect to the master archive system constituted by the master conveyance unit and the master cartridge, and a position error with respect to the archive system constituted by the sample conveyance unit and the sample cartridge, based on the first positional error, the second positional error, And a fourth step of obtaining a second step of obtaining the second step.

In one embodiment, the position error obtained in the first step may be stored in the flash of the sample cartridge.

In one embodiment, the position error for the archive system comprised of the sample transfer unit and the sample cartridge may correspond to a value obtained by subtracting the third error from the sum of the first error and the second error.

In one embodiment, the position error may correspond to a position error for each slot included in the cartridge.

In one embodiment, the positional error for each slot is determined based on a signal obtained by reading the position information provided in the cartridge through the transfer unit, and the transfer slot is shifted from the transfer slot in a state where the slot of the transfer unit is aligned with the corresponding slot It can be obtained in a direction deviated from the distance.

According to another aspect of the present invention, there is provided an optical disc-based archive system including: a drive bay including a plurality of optical disc drives for recording data on an optical disc or for reading data recorded on the optical disc; A cartridge including a plurality of slots for storing an optical disk and capable of detecting the position of each slot; A transferring unit for transferring the optical disc from the slot of the cartridge to the optical disc drive or transferring the optical disc from the optical disc drive to the slot of the cartridge; And a second position error associated with the transfer unit and a third position error associated with the master transfer unit and the master cartridge to determine a position error for the archive system comprised of the transfer unit and the cartridge And a control unit.

In one embodiment, a cartridge flash for storing the first position error may be further included, and the second position error and the third position error may be stored in a flash memory provided in the transfer unit or an internal memory of the control unit .

In one embodiment, the position error for the system may correspond to a sum of the first error and the second error minus a third error.

In one embodiment, the position error for the system may correspond to a position error for each slot included in the cartridge.

In one embodiment, the control unit reads the position information of the cartridge while moving the conveying unit by driving the conveying unit to obtain a position signal, and based on the position signal, in a state where the slot of the conveying unit is aligned with the target slot, And to control the transporting unit to move the transporting unit to compensate for the obtained positional error.

In one embodiment, the control unit obtains an input value of a motor for compensating for the position error based on the position error and the sensitivity of the motor for moving the conveyance unit, and applies the input value to the motor, You can rearrange slots and target slots.

In one embodiment, the first position error is a position error found for the archive system comprising the master transfer unit and the cartridge, and the second position error is a position error for the archive system comprising the transfer unit and the master cartridge It may be an error.

Accordingly, it is possible to reduce the position error of the picker robot and the cartridge in the optical disc-based archive system, to correctly pull the optical disc into the slot of the cartridge for storing the disc, or to accurately pull the optical disc from the slot.

FIG. 1 illustrates an optical disk-based archive system to which the present invention is applied,
2 shows a structure of a picker robot for moving an optical disc to a cartridge and a drive in an optical disc-based archive system,
3 shows an embodiment using a position sensor to control the position of a picker robot in an optical disk based archive system,
4 shows a mechanism for transferring an optical disc in two directions in an optical disc-based archive system,
FIG. 5 is a view showing a state in which the optical disc can not be correctly inserted into or withdrawn from the cartridge due to the position or position error of the pick-up device for transferring the optical disc in the optical disc-based archive system,
6 shows a positional error caused by an angle change according to a tilted posture of the pickup apparatus in an optical disk based archive system,
FIG. 7 illustrates a process of calculating a position error that may occur in an optical disc-based archive system according to an embodiment of the present invention,
FIG. 8 shows a configuration of a functional block of an optical disc-based archive system.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an optical disk based archive system according to the present invention will be described in detail with reference to the accompanying drawings.

An optical disc based archive system is a system in which a plurality of optical discs are stored in left and right separate cartridges and a picker (or picker robot or disc transfer assembly) that moves between the right and left cartridges removes the optical disc from the cartridge, The optical disc is loaded on the optical disc drive or unloaded from the optical disc drive and then moved to a state fixed on the picker body and put back into the cartridge, Or reads data from the optical disc.

1 shows an optical disc based archive system to which the present invention is applied.

The optical disc-based archive system 100 mainly includes a drive bay 110 in which a plurality of optical disc drives (ODD) are installed, a picker (or picker robot) 120 for moving the optical disc, A cartridge 140 for storing an optical disk, a guide 140 for guiding the movement of the picker 120, a fan module 150 having a plurality of cooling fans for emitting heat generated in the optical disk drive, and the like As shown in FIG.

The guide 140 is installed between the left and right drive bays 110 and between the left and right cartridges 130 so that the picker 120 can move between the cartridge 130 The drive bay 110 and the cartridge 130 along the longitudinal direction of the drive bay 110. [

For example, three optical disc drives can be installed in the drive bay 110, so that up to six optical discs can be loaded in the left and right drive bays to perform data recording or data reading operations at the same time.

The cartridge 130 can store, for example, 250 optical discs, so that up to 500 optical discs can be stored in the left and right cartridges 130 installed on both sides of the picker 120, System. &Lt; / RTI > The cartridge 130 has a large space behind the cartridge disk rack in the rear opened shape so that the kicker 120 has sufficient penetration space to push the optical disk into the body of the picker 120.

2 shows the structure of a picker 120 for moving an optical disc from the optical disc-based archive system to the disc drive of the cartridge 130 and the drive bay 110. As shown in FIG.

The picker or picker robot 120 fixes the optical disc drawn from the cartridge 130 or the drive bay 110 to the center of the picker 120 and moves the picker 120 along the guide 140 A disc handling assembly 121 for loading the optical disc into the drive bay 110 or the cartridge 130, a kicker arm (or kicker) 122 for pulling out the optical disc from the cartridge 130, A main frame 123 having a shoulder shape for extending the kicker arm 122 from the handling assembly 121, a position encoder 124 for detecting the position of the picker, A step motor 125 for detecting the position of the kicker arm 122, and a photo interrupter 126 for detecting the position of the kicker arm 122.

The disk handling assembly 121 includes a device for connecting two optical disks at the same time and connecting the picker robot 120 to the guide 140 for movement along the guide 140, A plurality of solenoids for allowing the optical disc to be inserted into the slot provided in the optical disc 121 to stay in a safe position and for loading the optical disc drawn into the disc handling assembly 121 into the drive bay 110 or the cartridge 130 An actuator such as a step motor can be mounted. The actuator of the disk handling assembly 121 pushes the edge of the optical disk that is stopped in the disk handling assembly 121 to pull or load the optical disk into the slot of the drive bay or cartridge 130 of the drive bay 110.

The optical disk is drawn out from the cartridge 130 by the rotation of the kicker arm 122 and is moved and fixed to the disk handling assembly 121. The picker robot 120 May move along the guide 140 to the drive bay 110 and then load the optical disc into the drive bay 110 through the actuator of the disc handling assembly 121.

The optical disk in the drive bay 110 is unloaded from the drive bay 110 and fixed to the center of the picker robot 120 by the actuator of the disk handling assembly 121, When the robot 120 moves along the guide 140 to the cartridge 130 and aligns with the disk slot in the cartridge 130, the optical disk is moved by the plurality of actuators included in the disk handling assembly 121, May be loaded into the cartridge 130.

FIG. 3 illustrates an embodiment using a position sensor to control the position of a picker robot in an optical disk based archive system.

As shown in FIG. 3, the picker robot 120 may be configured so that the picker robot 120 can move to a position relative to a disk slot of the cartridge 130 to which the optical disk is to be drawn by the closed- A plurality of holes are formed in a straight line in the left and right cartridges 130 along the movement path. The fine holes Hole_F and the coarse holes Hole_C, Are formed side by side in parallel. The fine holes are formed at narrow intervals in order to precisely detect the moving position of the picker robot, and the course holes are formed at wide intervals in order to detect the moving position of the picker robot approximately and quickly.

The picker robot 120 is provided with sensor units 1241 and 1242 in which a plurality of sensors including a light emitting unit for emitting light toward the hole and a light receiving unit for receiving light transmitted through the hole are disposed, Respectively. For example, two fine hole sensors including a light emitting portion and a light receiving portion are disposed in one sensor portion 1241 to detect the fine holes, and another sensor portion 1242 is provided with a light emitting portion And a light-receiving unit.

As the picker robot 120 moves, the picker robot 120 moves accurately to the position of a slot included in the cartridge 130 based on a signal output by the hall sensor, Can be inserted or extracted.

As described above, the optical disc-based archive system 100 records data on an optical disc by electrical and mechanical operations of a drive bay 110 in which a plurality of optical disc drives are installed and a picker robot 120 for transferring an optical disc Or reads data recorded on the optical disk.

Figure 4 shows a mechanism for transporting an optical disc in two directions in an optical disc based archive system.

The optical disc based archive system is configured to transfer the optical disc in the X direction for loading / unloading (loading / unloading) the optical disc into / from the optical disc drive or cartridge 130 of the drive bay 110, And a transfer in the Y direction in which the optical disk is carried by the disk handling assembly 121 of the picker robot 120 and transported.

The feeding in the X direction is performed by an unloading mechanism inside the optical disc drive of the drive bay 110, a rotational movement of the kicker arm 122 of the picker robot 120, and an actuator driving included in the disc handling assembly 121 An optical disk drive, a cartridge 130, and a device for stopping the disk handling assembly 121 from moving in the X direction are provided.

The Y directional movement moves the picker robot 120 to a desired position in order to draw or eject an optical disk contained in the disk handling assembly 121 into a desired slot in the cartridge 130 with a desired optical disk drive in the drive bay 110 The picker robot 120 is moved along a guide 140 provided between the left and right drive bays 110 and the left and right cartridges 130 at the center thereof.

The guide 140 may include a screw 141 for driving the picker robot 120 back and forth and a stepping motor 142 for rotating the screw, 140 may be connected to a trough or a mountain of the screw 141 to convert the rotational motion of the screw 141 into a linear motion in the Y direction.

The standard optical disk has a thickness of 1.25 mm at the outer diameter and the picker slot provided in the disk handling assembly 121 of the picker robot 120 and the cartridge slot of the cartridge 130 must be positioned in order to place the optical disk in the proper position for inserting the optical disk into the cartridge 130. [ For example, within +/- 0.30 mm, between the slots of the slot 130 in the center line.

FIG. 5 is a view showing a state in which the optical disc can not be correctly inserted into or withdrawn from the cartridge due to the position or position error of the pick-up device for transferring the optical disc in the optical disc-based archive system,

5A shows a picker robot 120 combined with a guide 140 and a guide 140 in an ideal case. The screw 141 of the guide 140 is linearly arranged at an angular position The position of the picker robot 120 is perpendicular to the floor at each position in the Y direction and the picker robot 120 is vertically placed from the screw 141 toward the cartridge 130 .

5 (b) and 5 (c), the guide 140 for Y-directional transfer in the actual optical disc-based archive system is deformed so that the picker robot 120 moves in the slots of the cartridge 130, / RTI > can not be pulled in / out correctly.

The screw 141 is rotated by the rotational force of the step motor 142 in the guide 140 so that the picker robot 120 connected to the crest of the screw 141 or the mountain moves. Since the screw 141 is long The center portion of the screw 141 is sagged by its own load and the picker robot 120 is not perpendicular to the bottom when the screw 141 is positioned at both ends of the screw 141 as shown in Figure 5 (b) The optical disc can not be accurately aligned with the slot of the optical disc, and a position offset occurs, which makes it difficult to accurately pull in / out the optical disc.

5 (c), the screw 141 is deformed so that the position of the picker robot 120 is different for each position of the screw 141, and the position of the picker robot 120 is not aligned with the desired slot of the cartridge 130 Offset can occur.

6 shows a position error caused by an angle change according to a tilted posture of the pickup apparatus in an optical disk based archive system.

5, when the picker robot 120 changes its angle from the screw 141 toward the cartridge 130 due to the deformation of the screw 141 that guides the picker robot 120 in the Y direction, From the end of the slot in the disk processing assembly 121 located in the X direction of the picker robot 120 from the picker robot 141 toward the cartridge 140, that is, toward the slot of the cartridge 140 from the picker robot 120, The slots of the picker robot 120 and the slots of the cartridge 140 are not aligned with each other due to the length of the picker robot 140 and an error occurs as shown in FIG.

For example, if the picker robot 120 is tilted by about 1 degree, the position offset is 140 (mm) X sin (mm) when the length in the X direction from the screw 141 to the slot of the picker robot 120 is about 140 1 degree) = 2.44 (mm), and a position offset of 0.244 (mm) occurs for a tilt of about 0.1 degree.

The position error between the slot of the picker robot 120 and the slot of the cartridge 130 can be accurately measured to prevent a failure in pulling in / ejecting the optical disk from the cartridge 130 by such positional error (or offset) And to improve the reliability of the optical disc-based archive system.

In the present invention, the positional error (position offset) between the slot of the picker robot 120 and the slot of the cartridge 130 is detected by the system error generated by the picker robot 120 and the guide 140, Cartridge error.

The cartridge error is an offset generated when the cartridges 130 for storing a plurality of optical disks are manufactured. The system error is detected by the picker robot 120 moved by the screw 141 of the guide 140 and the stepper motor 142 It is the unique characteristic of the system according to the position that occurs when it occurs.

FIG. 7 illustrates a process of calculating a position error that may occur in an optical disk-based archive system according to an embodiment of the present invention. The position error is measured and calculated for each slot of the left and right cartridges 130.

The process of acquiring the position error of each slot of the optical disc based archive system includes a first step of obtaining a position error by the combination of the master conveyance unit (guide and picker robot) and the master cartridge whose performance has been verified, A second step of obtaining a position error by a combination of cartridges, a third step of obtaining a position error by a combination of the master cartridge and a sample transfer part to be measured, and a sample cartridge to be measured using the position error obtained in each step And a fourth step of obtaining an error due to a combination of the sample transferring parts to be subjected to the first to third steps. The order of the first to third steps may be changed.

The archive system 100 moves the picker robot 120 in the Y direction while rotating the screw 141 by the driving force of the step motor 142 of the guide 140. The picker robot 120 moves the encoder 124, Confirms the positions of the slots to be measured from the signals detected in the plurality of fine holes and the course holes provided in the cartridge 140 and if it is determined based on the signal detected by the encoder 124 that it is near the position of the slot to be measured The driving speed of the step motor 142 is adjusted so that the picker robot 120 stops at the central position of the corresponding slot.

The error in each slot in the cartridge is determined by the archival system 100 as being aligned with the slot of the picker robot 120 and the corresponding slot of the cartridge 130 through the above process, (Distance in the Y direction) of the corresponding slot of the slot 130 in the direction perpendicular to the slot. An average of the measured values repeated over a plurality of times for the same slot can be calculated as an error with respect to the position.

The position error to obtain the position error for each slot of the cartridge with respect to the combination of a master cartridge and a master transport unit in step 1 k is the sum of the master error C _M and error S _M in the master transport unit of the cartridge (k = C _M + S _M ). The position error obtained in the first step may be stored in the flash memory included in the picker 120 of the transfer part of the archive system to be measured.

In the second step, the master cartridge is removed from the combination of the master cartridge and the master transfer part, and the master cartridge is replaced with the sample cartridge of the archive system to be measured, so that the position error is obtained in each slot of the sample cartridge with respect to the combination of the sample cartridge and the master transfer part The position error C ' _x can be expressed by the sum (C' _x = C _x + S _M ) of the error C _x of the corresponding sample cartridge and the error S _M of the master transfer unit. The position error obtained in the second step can be stored in the flash memory included in the sample cartridge 130. [

The position error, for obtaining a position error at each slot of the cartridge with respect to the combination of removing the cartridge from the archiving system to be measured in the step 3, the master cartridge and the sample transport unit to replace the master cartridge S _'x is error S in the master cartridge It may be represented by _M to the sum _{(S 'x = C M +} S x) of the error S _x of the sample transport unit. The position error obtained in the third step may be stored in a flash memory provided in the picker 120 of the sample transfer section or a flash memory provided in the step motor 142 of the transfer section guide 140. [

Therefore, the position error of the archive system to be measured consisting of the sample archive and the sample transfer unit can be expressed as (C _x + S _x ), which is the sum of the expressions obtained in the second step and the expressions obtained in the third step, the expression obtained by subtracting the formula obtained in step, that is, by the following equation _{(C x + S x) =} (C x + S M) + (C M + S x) - can be obtained (C _M + S _M).

FIG. 8 shows a configuration of a functional block of an optical disc-based archive system, and shows only a configuration of a block necessary for transferring a disk in the archive system.

The optical disc-based archive system includes a drive bay 110, a picker robot 120, a picker flash 127 for storing a position error of a picker, a cartridge 130, A stepping motor 142 for rotating the screw 141 for Y-directional transfer of the picker robot 120 and a processor, memory, operating system (OS), custom program code and hardware And a single board computer (SBC) 160 serving as a controller for commanding or controlling other hardware in the system.

The single board computer (SBC) 160 plays a role of recording or reading data to be archived or already archived by using an optical disk drive, connected to the archive server. In other words, it communicates with the system server through Gigabit Ethernet to receive commands, control and data, and interprets the information in the job task in the archive system, for example, disk movement, communication with the drive, Controls the picker robot 120 and the optical disk drive, processes requests for data access and storage, and instructs the picker robot 120 to select an appropriate disk and load it into the appropriate drive.

The picker flash 127 may store error data measured in an archive system including a master cartridge and a master transfer unit. A flash memory may be provided in the step motor 142 instead of the picker flash 127 Or the data stored in the picker flash 127 in the internal memory of the SBC 160 may be stored instead.

The cartridge flash 131 is used to store metadata about the optical disc in the cartridge 130, including a list listing what is in each slot of the cartridge 130, a volume identifier for each disc, A simple history of the disc including the number of rewrites and the number of errors of the disc.

The single board computer 160 confirms the data stored in the picker flash 127 and the cartridge flash 131 and performs a transport operation of the optical disk based on the data.

First, in a master archive system composed of a master cartridge and a master transfer unit in the first step, with respect to each slot of the master cartridge, it is determined that the picker slot of the picker robot is aligned with the corresponding cartridge slot, The error is measured and the measured position error for each slot is stored in the picker flash 127 of the archive system to be measured, flash in the stepper motor 142 or nonvolatile memory in the SBC 160.

In the second step, with the master cartridge of the master archive system being replaced with the sample cartridge of the archive system to be measured, the position error is measured for each slot of the sample cartridge and the measured position error is stored in the flash .

In the third step, the position error is measured for each slot of the master cartridge with the master cartridge applied to the archive system to be measured, and the measured position error is detected by the picker flash 127, the flash in the step motor 142, or the SBC Volatile memory in the memory 160.

A process of loading an optical disk stored in a slot of the cartridge 140 into the optical disk drive of the drive bay 110 will be described.

When the archive system 100 is turned on, the single board computer 160 reads data stored in the picker flash 127 and the cartridge flash 131 and stores the data in an internal memory (not shown).

The single board computer 160 identifies the slot (target slot) of the cartridge 130 in which the disk to be loaded in the optical disk drive is stored based on the data read from the cartridge flash 131, And the picker robot 120 moves according to the rotation of the screw 141. The encoder 124 of the picker robot 120 moves the cartridge 141 130 to the target slot while checking the position of the current picker robot 120 from the course hole.

The single board computer 160 determines that the slot of the picker robot 120 and the target slot of the cartridge 130 are aligned by the signal of the encoder 124, The position error of the picker robot 120 is calculated on the basis of the position error data stored in the internal memory of the stepping motor 142, Thereby correcting the obtained positional error and aligning the slot of the picker robot 120 with the target slot accurately.

The internal memory of the single board computer 160 is connected to the internal circuit of the single board computer 160 through a screw 141 in accordance with the sensitivity of the step motor 142 of the guide 140 or the input (unit voltage or unit step) The movement distance of the bone or the mountain is stored so that the input value to be applied to the step motor 142 for positional correction of the picker robot 120 is determined based on the position error with respect to the target slot and the sensitivity of the step motor 142 .

When the position error is compensated for and the slot of the picker robot 120 is correctly aligned with the target slot again, the single board computer 160 controls the picker robot 120 to move the optical disk stored in the target slot to the disk handling assembly The kicker arm 122 is rotated by the rotational force of the step motor 125 of the picker robot 120 to roll the optical disk being stored in the target slot and the optical disk is moved to the picker robot 120 Once in the slot, the actuator inside the disk handling assembly 121 fixes the optical disk.

The single board computer 160 controls the step motor 142 of the guide 140 to rotate the screw 141 to move the slot of the target optical disk drive of the drive bay 11 and the slot of the picker robot 120, And when an actuator in the disk handling assembly 121 pushes the optical disk toward the optical disk drive and the optical disk enters the optical disk drive, the motor in the optical disk drive grips the optical disk and fixes the optical disk in the clamp . Since the slots of the optical disk drive are relatively wide, there is no great problem in moving the optical disk in the X direction in a state aligned with the slots of the picker robot 120. [

The unloading process of moving and storing the optical disc in which data is written or read from the optical disc drive of the drive bay 110 to the target slot of the cartridge 140 is performed in the reverse order to the loading process described above, Is omitted.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. Addition or the like.

100: Archive system 110: Drive bay
120: picker robot 121: disk handling assembly
122: kicker arm 123: frame
124: encoders 1241 and 1242:
125: step motor 126: photo interrupter
127: picker flash 130: cartridge
131: Cartridge flash 140: Guide
141: screw 142: step motor
150: fan module 160: single board computer

Claims

A drive bay including an optical disk drive for writing data on an optical disk or reading data from an optical disk, a cartridge including a plurality of slots for storing an optical disk, and an optical disk drive In an optical disk-based archive system configured to include a transport unit for transporting an optical disk between an optical disk drive and a cartridge,
A first step of obtaining a first position error for a first archive system composed of a master transfer unit and a sample cartridge;
A second step of obtaining a second positional error with respect to a second archive system constituted by the sample transferring section and the master cartridge; And
Based on the first positional error, the second positional error, and the third positional error obtained with respect to the master archive system constituted by the master conveyance unit and the master cartridge, the positional error with respect to the archive system constituted by the sample transfer unit and the sample cartridge And obtaining a position error in an archive system comprising a fourth step of obtaining the position error.

The method according to claim 1,
Wherein the first step further comprises the step of storing the obtained position error in the flash of the sample cartridge.

The method according to claim 1,
Wherein the position error for the archive system comprised of the sample transfer unit and the sample cartridge corresponds to a value obtained by subtracting a third error from a sum of the first error and the second error.

The method according to claim 1,
Wherein the position error corresponds to a position error for each slot included in the cartridge.

5. The method of claim 4,
A position error of each slot is calculated by reading the position information provided in the cartridge through the transfer unit and moving the slot of the transfer unit in a direction deviating from the displacement of the transfer unit slot and the corresponding slot Wherein the position error is obtained in an archive system.

A drive bay including a plurality of optical disc drives for recording data on an optical disc or for reading data recorded on the optical disc;
A cartridge including a plurality of slots for storing an optical disk and capable of detecting the position of each slot;
A transferring unit for transferring the optical disc from the slot of the cartridge to the optical disc drive or transferring the optical disc from the optical disc drive to the slot of the cartridge; And
A control unit for obtaining a position error with respect to an archive system constituted by the conveyance unit and the cartridge based on a first position error relating to the cartridge, a second position error relating to the conveyance unit, and a third position error related to the master conveyance unit and the master cartridge, And an optical disk-based archive system.

The method according to claim 6,
Further comprising a cartridge flash for storing said first position error,
Wherein the second positional error and the third positional error are stored in a flash memory provided in the transfer unit or an internal memory of the control unit.

The method according to claim 6,
Wherein the position error for the system corresponds to a value obtained by subtracting a third error from a sum of the first error and the second error.

The method according to claim 6,
Wherein the position error for the system corresponds to a position error for each slot included in the cartridge.

10. The method of claim 9,
The control unit reads the positional information provided in the cartridge while moving the conveying unit to move the conveying unit to obtain a position signal, and based on the positional information, aligns the slot of the conveying unit with the target slot, Wherein the control unit controls the transfer unit to move the transfer unit to move the transfer unit.

11. The method of claim 10,
Wherein the control unit obtains an input value of a motor for compensating the position error based on the position error and the sensitivity of the motor for moving the feed unit and applies the input value to the motor so that the slot of the feed unit and the target slot And rearranges the optical disk based on the optical disk.

The method according to claim 6,
Wherein the first positional error is a positional error obtained with respect to the archive system constituted by the master conveyance unit and the cartridge and the second positional error is a positional error with respect to the archive system constituted by the conveyance unit and the master cartridge, Optical disk based archive system.