JP6450702B2 - Method of reading data stored in platter built in hard disk drive - Google Patents

Description

The present invention relates to a reading Way Method read data stored in the platter, which is incorporated in the hard disk drive in a state that can not be read correctly.

  In general, a hard disk drive has a platter in a housing filled with air. A platter is a disk-shaped recording medium having a magnetic surface capable of reading and writing digitally encoded data. During operation of the hard disk drive, the platter rotates inside at high speed, and data is read and written by a cantilever arm-like read / write head.

  Note that the read / write head has a structure in which the read / write head itself is slightly lifted by lift generated by an air flow accompanying rotation of the platter in order to avoid contact with the platter during operation. On the other hand, in order to accurately read the information recorded continuously and concentrically on the surface of the platter by the read / write head, the gap between the read / write head and the surface of the platter is highly accurate during operation. Therefore, the read / write head is designed to be positioned at a height in consideration of its floating movement.

  By the way, in recent years, for the purpose of improving the storage capacity of a hard disk drive, there is a case in which a case containing a platter is filled with helium instead of normal air and sealed (for example, Patent Document 1). Helium has a density one-seventh that of air, and since the airflow generated in proportion to the air during operation is drastically reduced, there is little vertical blurring during rotation of the platter, and the read / write head by rotation of the platter is stable. Can be reduced. For this reason, the gap between the platters can be reduced, and a large number of platters can be mounted close to each other in a casing having the same thickness, thereby improving the storage capacity.

  As described above, since the hard disk drive is a precision device, there is a case where data stored in the platter cannot be read normally due to a minor failure. As a company dealing with such a physical failure, failure occurred by disassembling the case and transferring the platter to another case, or by replacing a failed part such as a read / write head in the case. Generally, the hard disk drive normally reads data from the platter and transfers it to another hard disk drive.

JP 2013-84340 A (page 5, FIG. 1)

  In a hard disk drive filled with helium as described in Patent Document 1, helium flows out when the casing is opened and the sealed state is released at the time of handling the above-described failure. Such a hard disk drive not only requires special technology for filling the enclosure with helium, but also requires know-how to adjust the pressure of the helium to be filled, so once the enclosure is opened, the sealed state is released. And it is difficult to refill helium with a vendor who deals with the failure.

  In such a hard disk drive, the position of the read / write head is designed assuming the floating movement of the read / write head in an environment filled with helium. When operated in air, the read / write head has a higher lift than the design, so the read / write head may float more than necessary and the platter surface may not be read accurately. .

  As described above, a hard disk drive in which it is difficult to reproduce the set distance between the read / write head and the platter once the surrounding environment of the read / write head and the platter is changed once the casing is opened. In the case of failure countermeasures that have been performed until now, there was a problem that data could not be read from the built-in platter.

The present invention has been made paying attention to such problems, and is in a state where reading cannot be performed normally, and when the surrounding environment of the read / write head and platter changes, the read / write head and platter are changed. and to provide a reading way method can read data stored in the built-in platters set distance within the difficult hard disk drive to reproduce with.

In order to solve the above problems, a method of reading data stored in a platter built in a hard disk drive of the present invention is as follows.
A method of reading data stored in a hard disk drive that cannot be read normally due to a failure,
Releasing the sealed state of the hard disk drive housing;
A step of sealing housing a hard disk drive in which the sealed state is released to the container,
An atmospheric pressure adjusting step for adjusting the atmospheric pressure in the container;
A detection step of detecting that could accurate reading of data by the built in hard disk drive in the container was read from the flop Latta / write head,
Maintaining the atmospheric pressure in a state where the data can be accurately read during the atmospheric pressure adjustment step;
Reading the data from the platter while maintaining the atmospheric pressure, and transferring the read data to a storage medium;
It is characterized by having.
According to this feature, the atmospheric pressure in the container is adjusted by the atmospheric pressure adjustment process, so that the surrounding environment of the platter and the read / write head of the hard disk drive approaches the state before the sealed state of the housing is released. Furthermore, by detecting that the data has been read accurately, it is detected that the surrounding environment is substantially the same as the state before the sealed state of the casing is released. Therefore, by operating the hard disk drive in this state, the lift force related to the read / write head generated by the rotation of the platter becomes as designed, and the read / write head is lifted so as to be positioned on the platter at a predetermined height. The data recorded on the platter can be read accurately. Moreover, since the state in which data can be accurately read from the hard disk drive is maintained, the data can be accurately reproduced.

The atmospheric pressure adjusting step is an adjustment that gradually reduces the atmospheric pressure in the container.
According to this feature, it is possible to prevent the read / write head from coming into contact with the platter surface during atmospheric pressure adjustment.

In order to solve the above problems, a method of reading data stored in a platter built in a hard disk drive of the present invention is as follows.
A method of reading data stored in a hard disk drive that cannot be read normally due to a failure,
Releasing the sealed state of the hard disk drive housing;
A step of sealing the casing of the hard disk drive in which the sealing state is released,
Injecting helium from a hole formed in the housing;
Connecting the connecting line of the operating device to the hard disk drive;
A detection step of detecting that could accurate reading of data by the from the housing to the drilled hole during the process of injecting helium, read from the pull Latta built in the hard disk drive / write head,
Based on the detection information that the accurate reading of data has been started in the detection step, maintaining the atmospheric pressure in a state where the data can be accurately read from the hard disk drive,
Reading the data from the platter while maintaining the atmospheric pressure, and transferring the read data to a storage medium;
It is characterized by having.
According to this feature, helium is injected into the sealed case again, so that the environment around the hard disk drive platter and the read / write head approaches the state before the sealed state of the case is released. Furthermore, by detecting that the data has been read accurately, it is detected that the surrounding environment is substantially the same as the state before the sealed state of the casing is released. Therefore, by operating the hard disk drive in this state, the lift force related to the read / write head generated by the rotation of the platter becomes as designed, and the read / write head is lifted so as to be positioned on the platter at a predetermined height. The data recorded on the platter can be read accurately.

3 is a diagram illustrating a configuration of a reading device for data stored in a hard disk drive in Embodiment 1. FIG. (A) is a figure which shows the hard disk drive of the airtight state in Example 1, (b) is a figure which similarly shows the hard disk drive of the state which released the airtight state. FIG. 3 is a diagram showing a container in Example 1. It is a figure which shows the operating device in Example 1. FIG. FIG. 3 is a diagram illustrating a state in which the hard disk drive is accommodated in the container according to the first embodiment. It is a figure which shows a mode that the evacuation in the container in Example 1 is performed. It is a figure which shows a mode that helium is supplied to the container in Example 1. FIG. FIG. 3 is a diagram illustrating a state in which the hard disk drive in the container according to the first embodiment is read. It is a figure which shows a mode that helium in the container in Example 1 is deaerated. It is a figure which shows the state where the display which shows performing the reading operation process was displayed on the display. It is a figure which shows the state by which the display which shows an alerting | reporting means was displayed on the display. 6 is a diagram illustrating a procedure of a method for reading data stored in a hard disk drive in Embodiment 2. FIG. FIG. 10 is a diagram illustrating a reading device for data stored in a hard disk drive according to a third embodiment.

  A mode for carrying out a method and apparatus for reading data stored in a hard disk drive according to the present invention will be described below based on examples.

  FIG. 1 is a diagram illustrating a configuration of the reading device 1. The reading device 1 includes a sealed container 2 that can accommodate the hard disk drive H in a state where the sealed state is released, and a connection terminal 9a (see FIG. 3) that can be connected to the hard disk drive H accommodated in the container 2. And an operating device 3 disposed inside the container 2 and disposed outside the container 2 capable of operating the hard disk drive H.

  As shown in FIG. 2, the hard disk drive H includes a platter 5, a motor (not shown) for driving the platter 5, and a platter 5 in a housing 4 including a housing body 4 </ b> A and a lid body 4 </ b> B. And a reading / writing device 6 (device capable of performing at least one of reading and writing). In this hard disk drive H, the housing 4 is filled with a gas whose specific gravity is lighter than air (here, helium), and the data stored in the platter 5 cannot be read normally due to some failure. It is what has become. The reading / writing device 6 includes an arm-shaped reading / writing head 6A that can move on the platter 5 and a position retracted from the platter 5, and rotates the reading / writing head 6A (not shown). A drive unit 6B using a magnet and a preamplifier 12 for amplifying data read by the read / write head 6A are provided.

  Originally, the hard disk drive H is filled with helium in the housing 4 at a predetermined pressure, and the platter 5 receives a predetermined air resistance, so that the rotation speed of the platter 5 and the airflow generated by the rotation of the platter 5 are generated. A predetermined lift is generated for the read / write head 6A. The read / write head 6A is maintained at a predetermined height by the airflow on the upper surface side and the airflow on the lower surface side of the read / write head 6A, so that the data stored in the platter 5 can be read normally. It is possible.

  As shown in FIG. 3, the container 2 includes a container body 2A having a metal cylindrical shape and having an opening 2a on the upper side, and a lid 2B that closes the opening 2a of the container body 2A. . A sealing material (not shown) is fixed to the surface of the lid 2B facing the opening 2a of the container body 2A, and the container 2 is completely sealed when the lid 2B is closed with the opening 2a. A viewing window 2b attached in a sealed manner is provided on the side surface of the container main body 2A.

  The lid 2B includes a barometer 11 that measures the atmospheric pressure in the container 2 and connection plugs 7A and 7B that penetrate the lid 2B. The connection plugs 7A and 7B are provided with valve devices 8A and 8B for opening and closing the connection plugs 7A and 7B, respectively.

  Further, a connecting wire 9 having a connecting terminal 9a connected to a terminal of a hard disk drive H accommodated in a container 2 described later is inserted into the lid 2B. The connecting line 9 is inserted through a hole (not shown) formed in the lid 2B, and a part of the longitudinal direction is fixed in a sealed manner to the hole.

  The other end of the connecting line 9 exposed to the outside of the container 2 is connected to the operating device 3 (see FIG. 4). The operation device 3 is a so-called personal computer, and includes a personal computer main body 3a, a display 3b connected to the personal computer main body 3a, a keyboard, a mouse, and the like. The function of stopping the operation and storing the data read by the reading / writing device 6 from the platter 5 in the hard disk drive H (see FIG. 2) in a storage medium connected to the personal computer main body 3a. Have.

  As a procedure for reading data stored in the platter 5 in the hard disk drive H by using the reading device 1, first, the cover 4B of the hard disk drive H is removed, the faulty part is inspected, and reading is performed as necessary. / Repair the failed part such as the writing device 6 or the like. At this time, when the housing 4 is opened, the helium filled in the housing 4 flows out. In this repair process, the hard disk drive H is in a normally functioning state except for the factor that the surrounding environment between the platter 5 and the read / write head 6A is not helium at the atmospheric pressure at the time of design. If it is determined that the problem cannot be solved by replacing the failed part, the platter 5 is removed, and the removed platter 5 is transferred to another hard disk drive that operates normally.

  Subsequently, as shown in FIG. 5, the hard disk drive H in which the problem of failure has been solved is housed in the container body 2A with the lid 4B attached again, and the connection terminal 9a of the connection line 9 is connected to the hard disk drive. Connect to H. Thereafter, the opening 2a is closed by the lid 2B, and the container 2 is completely sealed (accommodating step). At this time, the hard disk drive H is in a state where the housing body 4A and the lid body 4B are not completely sealed so that the gas outside the hard disk drive H can enter the hard disk drive H.

  Next, as shown in FIG. 6, the deaeration pipe 16 of the deaeration device 10 is connected to the connection plug 7B, the valve device 8B of the connection plug 7B is opened, and the deaeration device 10 is driven. Then, the inside of the container 2 is evacuated, and the valve device 8B is closed. The deaeration device 10 is composed of a flow rate adjustment valve fluidly connected in parallel to a vacuum pump and an external vacuum pump (not shown), and adjusts the atmospheric pressure in the container 2. Further, electromagnetic valves are respectively provided on the container 2 side of the vacuum pump and the flow rate adjusting valve.

  Next, as shown in FIG. 7, the supply pipe 15 for supplying helium to the connection plug 7A is connected, and the valve device 8A is opened. The user performs helium filling until the inside of the container 2 reaches a predetermined atmospheric pressure while checking the barometer 11, confirms that the predetermined atmospheric pressure has been reached, and closes the valve device 8A. At this time, the controller device 3 connected to the hard disk drive H keeps the hard disk drive H from starting a reading operation. In detail, the container 2 is rotated by the driving unit 6B until the inside of the container 2 reaches a predetermined atmospheric pressure, and the reading / writing head 6A is positioned at a position retracted from the platter 5 (see FIG. 5).

  When it is confirmed that the inside of the container 2 has a predetermined atmospheric pressure, the controller device 3 performs a reading operation process of the hard disk drive H. By starting the reading operation process, the read / write head 6A is moved onto the platter 5 by being rotated by the driving unit 6B (see FIG. 8), and reading of data stored in the platter 5 is continuously attempted. . In parallel with this reading operation processing, as shown in FIG. 9, the valve device 8B of the connection plug 7B to which the deaeration pipe 16 is connected is opened, and the deaeration device 10 (atmospheric pressure adjustment device) is driven. The air pressure in the container 2 is gradually lowered (atmospheric pressure adjustment step).

  FIG. 10 is a diagram showing a display on the display 3b of the controller device 3 during the reading operation process. The air pressure in the container 2 gradually decreases as the deaeration device 10 is driven, and accordingly, the distance between the platter 5 and the read / write head 6A gradually decreases, and the platter 5 and the read / write head in the container 2 are gradually reduced. When the surrounding environment of 6A becomes substantially the same environment as the inside of the housing 4 of the original hard disk drive H before the lid 4B is opened and the sealed state of the housing 4 is released, the reading is successful. Note that the expression “substantially the same environment as the inside of the housing 4 of the original hard disk drive H” is not strictly the same as the air flow generated by the rotation of the platter 5 before the sealed state is released. 5 and the atmosphere around the read / write head 6A are used in the sense that the atmosphere around the platter 5 and the read / write head 6A in the casing 4 of the original hard disk drive H is substantially the same.

  In addition, it is preferable to use the same gas (here, helium) as the gas sealed in the housing 4 because there is less influence on the bearings of the platter 5 in the housing 4 in addition to the air flow.

  The operating device 3 may be able to restore data composed of a set of magnetic data by reading the magnetic data of the platter 5 by the reading / writing device 6 and analyzing the read magnetic data. Based on the determination, the start of accurate reading is detected (detection step).

  Specifically, the ambient environment between the platter 5 and the read / write head 6A has become substantially the same as that in the housing 4 of the original hard disk drive H before the sealed state of the housing 4 is released by the atmospheric pressure adjustment. In this state, the read / write head 6A is lifted by the flying height at the time of design, that is, the distance between the read / write head 6A and the surface of the platter 5 is a predetermined distance at the time of design. The stored data will be read correctly.

  Although not shown here, the deaeration device 10 is connected to the operation device 3 via the connection line 19, and the driving operation of the deaeration device 10 can be adjusted by an operation from the operation device 3, and the above-described reading is successful. In this case, the personal computer main body 3a controls the deaeration device 10 so that the driving operation is maintained in a state where the atmospheric pressure in the container 2 is successfully read (maintenance step). Various control methods are conceivable. For example, the electromagnetic valve built in the deaeration device 10 may be closed, or the motor in the deaeration device 10 may be lowered to reduce the intake of the pump. The aspect which balances capability with the inside of the container 2 may be sufficient.

  Furthermore, when the personal computer main body 3a is successfully read, a screen indicating that the reading is successful is displayed on the display 3b as shown in FIG. On this screen, the data copy button 20 and the pressure recording button 21 are displayed together on the display 3b. Note that the screen displayed on the display 3b indicating that the reading has been successful is intended to notify the user that the reading has been successful. For example, the notification means can be replaced with a display on the display 3b. Notification by sound or light may be used.

  When the user operates the data copy button 20, the personal computer main body 3a reads the data stored in the platter 5 in the hard disk drive H, and transfers the read data to a storage medium connected to the personal computer main body 3a. I do.

  When the user operates the record atmospheric pressure button 21, the personal computer main body 3 a records information such as the atmospheric pressure in the container 2 in a state in which reading has been successful in a recording table in its own storage medium and stores it. The process which displays the screen (not shown) which completed is performed. At the time of recording information such as the atmospheric pressure, the user is not limited to the mode in which the user directly confirms the barometer 11 and fills in the recording table. For example, when the barometer 11 and the controller device 3 are connected and the controller device 3 detects that accurate reading has been started, the barometer information at that time is received from the barometer 11, and the barometer information Is automatically recorded in the recording table, it is possible to accurately record the atmospheric pressure in a state in which the reading is successful, without the user's operation of the recording button 21. In the recording table, in addition to the numerical value information of the atmospheric pressure, the model number of the hard disk drive H to be read, the manufacturer information, and the like are associated and recorded.

  Further, the operation device 3 can control the driving operation of the deaeration device 10 using the data in the recording table. When the hard disk drive is read, the same model as the hard disk drive is successfully read. Is recorded in the recording table, the air pressure can be automatically adjusted using the data such as the recorded air pressure in the second air pressure adjusting step, and the reading work efficiency can be improved.

  Next, a reading method according to the second embodiment will be described with reference to FIG. The description of the same configuration as that of the above embodiment is omitted.

  First, the lid 4B of the hard disk drive H is removed, the fault location is inspected, and repairs such as replacement of faulty parts such as the reading / writing device 6 are performed as necessary. At this time, the hole 30 is formed in the lid 4B (see FIG. 12A), and the film member 31 that is an elastic body is fixed so as to close the hole 30. Subsequently, in the hard disk drive H in which the problem of failure has been solved, the joint portion between the housing body 4A and the lid body 4B is sealed with a sealing material (not shown) with the lid body 4B attached again ( (Refer FIG.12 (b)).

  Then, as shown in FIG. 12 (c), the needle-like injection part 40 provided at the tip of the supply pipe 15 is pierced into the film member 31 in the portion where the hole 30 is located, and the supply pipe 15 is inserted into the housing 4. Helium is allowed to flow into.

  Based on the detection information indicating that the accurate reading has been started, the inflow of helium is stopped, the injection portion 40 is pulled out, and the hole 31a formed in the coating member 31 as shown in FIG. Is sealed with a sealing material 32. According to this, the atmosphere around the platter and the read / write head of the hard disk drive H can be brought close to the state filled with the original helium before the sealed state is released without preparing a container.

  Moreover, since the needle-like injection part 40 is pierced into the film member 31 and helium is injected, the hole 31a can be made small, and the hole 31a is closed by the elastic restoring force of the film member 31, so the injection part 40 is pulled out. From this time, helium is prevented from flowing out to the outside during sealing with the sealing material 32. Note that the sealing material that seals the joint between the housing body 4A and the lid body 4B and the sealing material that seals the hole only need to maintain a sealed state for a short period of time when data is read. do not need.

  Next, a reading apparatus according to the third embodiment will be described with reference to FIG. The description of the same configuration as that of the above embodiment is omitted.

  As shown in FIG. 13, the container 25 is a substantially U-shaped box that has an opening 25 a at the lower end and faces downward in a side sectional view. The container 25 is made of a light-transmitting material such as glass, and locking pieces 25c and 25c are formed on the top surface 25b side of the opening 25a on the side surface 25d of the container 25. On the locking pieces 25c, 25c, a mounting table 26 having a plurality of holes 26a penetrating vertically is removably supported. A supply pipe 15 for supplying helium is connected to a hole 25e provided in the side surface 25d of the container 25.

  As a reading method, the hard disk drive H is mounted on the mounting table 26, and helium is allowed to flow into the container 25 in a state where the mounting table 26 is substantially horizontal. The helium that has flowed into the container 25 has a small specific gravity, and therefore stays on the top surface 25b side in the container 25 through the hole 26a of the mounting table 26.

  According to this, when the original helium before unsealing is near atmospheric pressure, the platter of the hard disk drive H placed on the top surface 25b side where helium stays and the area around the read / write head The atmosphere approaches the state filled with the original helium before the sealed state is released, and the data recorded on the platter can be read accurately. Moreover, by setting it as such a structure, the structure with high airtightness is not required for the container 25, but it can be set as a simple structure.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  In the above-described embodiment, helium is supplied into the container 2 until a predetermined atmospheric pressure is reached, and then helium is degassed so that the atmospheric pressure is the same as that in the housing 4 of the original hard disk drive H before the sealed state is released. Thus, the data stored in the platter 5 can be read, but the present invention is not limited to this mode.

  For example, the container 2 is filled with air, and after the hard disk drive H is accommodated, the deaeration device 10 lowers the atmospheric pressure in the container 2 to a predetermined value or less, and then a pressure pump (atmospheric pressure) connected to the container 2. A mode in which air is gradually supplied into the container 2 by a pressurizing pump (atmospheric pressure adjusting apparatus) connected to the container 2 in parallel with the reading operation processing by the adjusting device.

  According to this, the amount of air around the platter 5 and the read / write head 6A in the container 2 is adjusted, and the inside of the housing 4 of the hard disk drive H filled with the original helium before the sealed state is released. Since the platter 5 receives the same resistance as the above, the read / write head 6A is lifted by the flying height at the time of design, and reading is possible.

  Moreover, in the said Example, although the atmospheric pressure in the container 2 was pressure-reduced using the deaeration apparatus 10, it is not restricted to this, For example, the capacity | capacitance of a bellows shape etc. has a structure which can carry out expansion deformation and reduction deformation. By doing so, the inside of the container may be depressurized at the time of enlargement or reduction. In this case, the container itself functions as a pressure adjusting device.

  In addition, in the atmospheric pressure adjustment step of gradually reducing the atmospheric pressure in the container 2 by driving the deaeration device 10 described above, the flow rate adjustment valve and the electromagnetic valve of the deaeration device 10 are changed from the operation device 3 after the start of the reading operation process. The operation is automatically controlled by an operably connected actuator (not shown). However, the present invention is not limited to this, and the user may manually control the deaeration device 10 or the deaeration device. Instead of using 10, the opening / closing adjustment and the opening degree adjustment of the valve device 8A or 8B may be performed to reduce the pressure in the container 2. In this case, the valve device 8A or 8B functions as an atmospheric pressure adjusting device.

DESCRIPTION OF SYMBOLS 1 Reading apparatus 2 Container 2A Container main body 2B Cover 2a Opening part 2b Window 3 Operation apparatus 3a Personal computer main body 3b Display 4 Case 5 Platter 6 Read / write head 7A, 7B Connection plug 8A, 8B Valve apparatus 9 Connection line 9a Connection Terminal 10 Deaerator 11 Barometer 15 Supply pipe 16 Deaeration pipe 19 Connection line 20 Data copy button 21 Record button H Hard disk drive

Claims (3)

A method of reading data stored in a hard disk drive that cannot be read normally due to a failure,
Releasing the sealed state of the hard disk drive housing;
A step of sealing housing a hard disk drive in which the sealed state is released to the container,
An atmospheric pressure adjusting step for adjusting the atmospheric pressure in the container;
A detection step of detecting that could accurate reading of data by the built in hard disk drive in the container was read from the flop Latta / write head,
Maintaining the atmospheric pressure in a state where the data can be accurately read during the atmospheric pressure adjustment step;
Reading the data from the platter while maintaining the atmospheric pressure, and transferring the read data to a storage medium;
A method for reading data stored in a hard disk drive.   2. The method of reading data stored in a hard disk drive according to claim 1, wherein the atmospheric pressure adjusting step is an adjustment for gradually decreasing the atmospheric pressure in the container. A method of reading data stored in a hard disk drive that cannot be read normally due to a failure,
Releasing the sealed state of the hard disk drive housing;
A step of sealing the casing of the hard disk drive in which the sealing state is released,
Injecting helium from a hole formed in the housing;
Connecting the connecting line of the operating device to the hard disk drive;
A detection step of detecting that could accurate reading of data by the from the housing to the drilled hole during the process of injecting helium, read from the pull Latta built in the hard disk drive / write head,
Based on the detection information that the accurate reading of data has been started in the detection step, maintaining the atmospheric pressure in a state where the data can be accurately read from the hard disk drive,
Reading the data from the platter while maintaining the atmospheric pressure, and transferring the read data to a storage medium;
A method for reading data stored in a hard disk drive.

Images