JPH011151A - Recording/playback system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention provides a recording system that enables recording and reproduction without error in different recording systems and software, each with different predetermined specifications.・Regarding playback systems, in particular, multiple types of recording units can be identified by multiple identification marks formed on the case of the recording unit, and recording units with new specifications that are newly supplied to the market are different from conventional recording units. -Relates to a recording/playback system that prevents writing by recording/playback devices with different playback methods.

(Conventional technology) In recent years, floppy disks have been developed with improvements in the characteristics of magnetic films and recording/
Due to improvements in playback methods, the storage capacity continues to increase year by year. Along with this, the maximum storage capacity is 1M with the same basic shape of the enclosing case but different characteristics of the recording magnetic film.
B floppy disk (hereinafter referred to as IMBFD),
A floppy disk with a maximum storage capacity of 2MB (hereinafter referred to as 2MB)
Two types of floppy disks (called BFD) coexisted. For these floppy disks, when the 2MBFD came on the market, we wanted to make the disk drive backward compatible, that is, so that the information recorded on the conventional floppy disk could be used as is. It is designed to allow reproduction of written information or new recording.

By the way, these IMBFD and 2MBFD adopt the horizontal magnetization recording method and use C as the magnetic material for magnetic recording.
Although o-γFe2O3 is used, currently there are 4MB floppy disks (hereinafter referred to as 4MBFD) that use Ba-ferrite as the magnetic material and adopt a perpendicular magnetization recording method to further improve the storage τ amount and have a servo mechanism. First, in place of the conventional tracking method (hereinafter referred to as open-loop tracking method) that relies on the mechanical precision of a stepping motor to position the track, Co.
- A floppy disk (hereinafter referred to as 6MBFD) that records servo information on a floppy disk using γF e 203 and adopts a tracking control method using the servo information, making it possible to record approximately 6MB of information, and a magnetic material such as Ba
- A floppy disk (hereinafter referred to as 16MBFD) was developed that recorded servo information on a floppy disk using ferrite and adopted a tracking control method using servo precision information, making it possible to record information of 16MB or more.
It is being put into practical use.

With the development of floppy disks with different recording methods, the number of types of floppy disks with the same basic case shape but with different recording/playback methods, recording media, etc. is about to increase. The method of identification and write protection if accidentally inserted into the underlying disk drive has become an issue.

When several types of floppy disks coexist in this way, there are two possible methods for automatically identifying the specifications of the floppy disk inserted into the disk drive: a software method and a hardware method.

The software method is a method in which a disk drive electromagnetically reads format information and data recorded on a floppy disk, and the system side makes a software decision.

However, this method has the problem that it cannot be applied to unformatted floppy disks or when even the format information cannot be confirmed because the recording/playback methods are different.

The hardware method is a method in which the disk drive mechanically or optically identifies the type of floppy disk, similar to the identification of writability, and does not require any judgment function on the system side. In the case of .5-inch floppy disks, two types of floppy disks, 1MBFD and 2MBFD, are identified using this method. In this method, an identification hole is provided in the case only for 2MBFD, and two sensors are installed in the 2MBFD disk drive to detect the two holes, so that floppy disks can be identified using a hardware method. I have to. However, the lower model 1MBFD disk drive does not usually have a sensor that detects the identification mark, so even if a 2MBFD is inserted into this IMBFD disk drive, this is an IMBFD disk drive.
I can't tell if it's an FD or a 2MBFD.

Therefore, when applying this identification method to a third floppy disk with a recording/playback method different from the above two types of floppy disks, for example, with a maximum capacity of 4MB, the conventional identification hole should be installed at a different position, and the recording/playback method should be changed. A disk drive that does this requires three sensors that can detect two types of identification holes and write-protect holes.

This allows this disk drive to identify the inserted floppy disk and detect whether it is write-protected or not, and therefore automatically selects the recording/playback method if it is a backward compatible disk drive. It is possible to switch.

However, this third floppy disk is 1MBF
If the disc drive is inserted into a D or 2M BFD disc drive, there is a risk that recording will be performed using the conventional recording method since these disc drives do not have a corresponding sensor. This not only prevents you from making full use of the new floppy disk's capabilities, but also may cause malfunctions.

This problem also arises for the fourth or fifth floppy disk, which uses a different tracking control method, and in this case, it becomes necessary to distinguish between the open loop tracking method and the track tracking method using servo information.

(Problem to be solved by the invention) In this way, in the conventional recording/playback system, 1MBFD and 2MBFD already exist, and 3rd and 4th Flo/Tubidisks with different specifications are now in the upper ranks. When these floppy disks are inserted into an existing 1MB FD or 2MB FD disk drive, it will cause problems because these disk drives do not have corresponding sensors. However, there was a risk that recording would be performed using the conventional recording method.

In this way, when existing IMBFDs and 2MBFDs and multiple types of recording units with the same basic case shape but different specifications coexist, the present invention is designed to replace existing IMBFDs and 2MBFDs with existing disk drives for these new recording units. To provide a recording/reproducing system which provides a function of making each recording unit identifiable and is configured in terms of hardware so that even if these new recording units are inserted into a conventional disk drive, they will not be recorded. It is an object.

[Structure of the Invention] (Means for Solving Problems) The recording/reproducing system of the present invention includes: (a) recording media having different specifications are housed in a plurality of cases having the same basic shape, and the cases can be opened and closed. (b) detecting the open/closed state of the write-protection window and the identification mark of the recording unit; It is characterized by having a recording and reproducing unit that performs recording and reproducing using a predetermined recording and reproducing method.゛The recording medium used in the present invention is a magnetic disk such as a general-purpose floppy disk, but it is also applicable to other erasable recording units such as an erasable optical disk. .

Further, the openable and closable write-protection window formed in each recording unit of the present invention does not need to be a mechanically penetrated window, but may be a window that can take two states of light transmission and non-light transmission using a liquid crystal, for example. Also, a through hole formed in the case is suitable as an identification mark, but a hole that does not go through is also acceptable.
Furthermore, any label that can be detected by various sensors, such as a metal piece or a magnetic piece, can be used.

(Function) In the present invention, a plurality of recording media having different specifications are housed in a case having the same basic shape, and the case has a write-protection window and an identification mark that can be opened and closed, and the write-protection window and the identification mark are provided in the case. By detecting the open/closed state of the write-protection window and the identification mark on multiple recording units whose marks are aligned with each other, recording and playback is performed using a predetermined recording and playback method, so that recording is always performed using the correct recording and playback method. Can be played.

(Example) Examples of the present invention will be described below.

1 and 2 are a back plan view and a front view of a first recording unit used in the present invention.

This recording unit is a conventionally known 3.5 inch IMB.
This is an FDI, and a write-protection window 3 that can be opened and closed is formed at the lower left of a case 2 that rotatably stores a magnetic disk. 4 is a hub.

Further, FIG. 3 shows a conventionally known 3.
5 inch 2P! It is an explanatory diagram of the lower part of the back side of IBFD5,
IMBFDl at the bottom left of case 2 that stores magnetic disks
A write-protection window 3 that can be opened and closed is formed at a position corresponding to the write-protection window 3, and an identification hole 6 that is always open is provided at the lower left.
is formed.

Furthermore, FIG. 4 is an explanatory view of the lower part of the back surface of the third recording unit, Ba-ferrite 4MBFD7, and the 2MBFD
A first identification hole 8 that is always open is formed at the same position as the write-protection window 3 of the 2MBFD 5, and a write-protection window 9 that can be opened and closed is formed at the position of the identification hole 6 of the 2MBFD 5. A second identification hole 10 which is always open is formed.

In the disk drive (not shown) used in this embodiment, three photosensors A, B, and C are arranged at the positions of the holes, as shown in FIG. Control as shown in the flowchart of FIG. 6 is performed to automatically set the system to modes 1 to 6.

That is, when a floppy disk is first inserted with the power on, it is determined whether it is 4MB, FD7, or distorted based on the presence or absence of an output from photosensor A. 4MB
If it is not FD7, it is set to 2 by photosensor B.
It is determined whether MBFD5 or not, and then the photo sensor C
It is determined whether writing is possible or not, and the respective modes 1 to 4 are set based on the result.

On the other hand, if sensor A determines that the inserted 70 disk is 4MBFD7, photosensor B determines whether or not it is writable. and 4MB
FD7 has 8 separate holes 8 formed at the position of photosensor C and its output is always ON, so no further judgment is made and the corresponding mode 5 or 6 is set as is according to the output of photosensor B. Ru.

Furthermore, in this embodiment, since the identification window 8 which is always open is formed at the position corresponding to the write-protection window 3 of the 1MBFD or 2MBFD of the 4MBFD, it is possible to accidentally write the 1MBFD.
Even if it is inserted into a D or 2MB FD disk drive, there is no need to worry about it being recorded.

Next, other embodiments of the present invention will be described.

FIG. 7 shows the fourth recording unit, 6M B F Dl.
1 is an explanatory diagram of the lower part of the back side of the 2MBFD 5, in which a first identification hole 8 which is always open is formed at the same position as the write-protection hole 3 of the 2MBFD 5, and an identification hole 12 is formed at a different position from the identification hole 10 of the third recording unit 7. is formed.

Figure 8 shows the fourth recording unit, 16M B F D
13, a first identification hole 8 that is always open is formed at the same position as the write-protection hole 3 of the 2MBFD 5, and a write-protection hole 9 that can be opened and closed is formed at the position of the identification hole 6 of the 2MBFD 5. A second identification hole 10 is formed above the write inhibit hole 9, and a third identification hole 12 is further formed above the first identification hole 8.

In the disk drive (not shown) used in this embodiment, as shown in FIG. Control as shown in the flowchart of FIG. 10 is performed to automatically set the system to modes 1 to 10.

First, when a floppy disk is inserted with the power on, it is determined whether it is a servo type or not based on the presence or absence of an output from photosensor A, and then photosensor B determines whether the in-plane magnetization recording method is ``perpendicular magnetization recording'' or not. Decide on the method.

When photosensor A is ON, the output of photosensor B is 16MB FD when it is ON, and 6MB when it is OFF.
It is determined that it is FD, and the photo sensor C determines whether or not writing is prohibited.

When the output of photosensor A is OFF, photosensor B identifies whether it is 4MBFD7 or not.
If it is identified as 4MBFD, photosensor C will
Determine whether writing is prohibited. If it is not 4MBFD7, photosensor C determines whether it is 2MBFD5, and photosensor D determines whether writing is possible.

In this embodiment as well, since the first identification hole 8, which is always open, is formed in a floppy disk of 4MB or more at a position corresponding to the write-protection hole 3 of an IMBFD or 2MBFD, it may be mistakenly used for a 1MBFD or a floppy disk. 2MBFD
Even if the disc is inserted into a disc drive, there is no need to worry about it being recorded using the wrong recording method.

The functions of the disk drive for each identification hole in this embodiment are summarized as follows.

[First identification hole 8] ■ Writing to 4MBFD, 6MBFD, and 16MBFD is prohibited in 1MBFD and 2MBFD disk drives.

■ 4MBFD, 6MBFD and 16MBFD
IMBFD, 2MBFD with disk drive for FD
Writing is prohibited in IM B F D and 2MB FD modes when using .

[9 write-protect holes■ 4MBFD, 6MBFD and 16MB F D
4MB FD, 6MBFD disk drive for
- and normal write protection when using 16M B F D.

■IMBFD with disk drives for 4MBFD, 6MBFD and 16MBFD
and 2MBFD identification.

[Second identification hole 10] - The magnetic recording method is a horizontal magnetization method (1M B F D, 2M
BFD, servo type 6MBFD) or perpendicular magnetization type (4M
BFD, servo type 16MBFD) identification.

[Third identification hole 12] Is servo information written on the floppy disk?
6M B F D, 16M B F D ) No (1M
BFD, 2MBFD, 4MBFD) identification.

Also, in this example, 4MBFD, 6MBFD, 16
All floppy disks such as M B F D
Since it has an identification hole 8 etc. which is always open at the position of the write-protection hole 3 which can be opened and closed on the IMBFD and 2MBFD,
Even if it is accidentally written to an IMBFD or 2MBFD disk drive, writing will be prohibited.

In the above embodiment, only the write-inhibited hole can be opened and closed, but the present invention is not limited to this embodiment, and the write-inhibited hole can be opened and closed. The identification hole 12 of No. 3 can be opened and closed,
It is also possible to select either the open track method or the servo-based tracking method for any recording unit.

In the above embodiments, an example was explained in which a photosensor was used as a sensor, but the present invention is not limited to such an embodiment. For example, a mechanical sensor using a pin may also be used. It is possible. Furthermore, the write-inhibiting hole formed in the case of the recording unit does not need to be formed mechanically; for example, a liquid crystal that can take two states of light transmission and non-transmission may be used. It is also possible to attach a metal piece or a magnetic piece instead of the hole and detect it electrically or magnetically to detect the presence or absence of the hole.

[Effects of the Invention] According to the present invention, it is possible to identify not only the recording density but also the tracking control method of a floppy disk, and also to automatically write data when a new type of recording unit is inserted into a conventional disk drive by mistake. It is also possible to prohibit.

[Brief explanation of drawings]

FIGS. 1 and 2 show a first example used in an embodiment of the present invention.
FIG. 3 is a partial true plan view of the second recording unit used in this embodiment, and FIG. 4 is a fifth recording unit used in this embodiment. A partial true plan view of the unit, FIG. 5 is a diagram schematically explaining the configuration of the disk drive used in this embodiment, FIG. 6 is an operation flowchart of the disk drive of this embodiment,
7 is a partial true plan view of a fourth recording unit used in another embodiment, 812I is a partial true plan view of a fifth recording unit used in this embodiment, and FIG. 9 is a partial true plan view of a fourth recording unit used in this embodiment. FIG. 10, which is a diagram schematically explaining the configuration of the disk drive used in this example, is an operation flowchart of the disk drive of this embodiment. 1・・・・・・・・・IM B F D2...
......Case 3.9...Write-protected window 4...Center hub 5...
・・・・・・・・・ 2M B F D6.8.10.12
...Identification hole

Claims (1)

[Scope of Claims] (1) (A) Recording media with different specifications are housed in a plurality of cases having the same basic shape, and the case has a write-protection window and an identification mark that can be opened and closed, and the write-protection window and identification mark are provided to prevent writing. a plurality of recording units having different arrangements of windows and identification marks; and (b) a recording and reproducing unit that detects the opening/closing state of the write-protection window of the recording unit and the identification marks and performs recording and reproducing according to a predetermined recording and reproducing method. A recording/playback system characterized by having: (2) The recording/reproducing system according to claim 1, wherein the identification mark is a through hole formed in the case. (3) The recording/reproducing system according to claim 1 or 2, wherein the recording medium is a disk-shaped recording medium. (4) The recording/reproducing system according to claim 3, wherein the disk-shaped recording medium is a magnetic disk. (5) (a) a first recording unit comprising a recording medium housed in a case having a write-protection window that can be opened and closed; (b) a first recording unit formed at the same position as the write-protection window of the first recording unit; A second recording medium is housed in a case having the same basic shape as the first recording unit and having an openable/closable write-protection window and an identification mark formed separately from the write-protection window.
(c) a first identification mark formed at the position of the write-protection window of the second recording unit and an openable/closable write-protection mark formed at the position of the identification mark of the second recording unit; a second recording unit formed at a different position from the window and the write-protection window of the second recording unit and the identification mark;
(d) each write-protect window and each identification mark of each of the recording units; [1] All sensors are OF
When F, writing and playback are performed using the first specification; [2] When the first and second sensors are OFF and only the third sensor is ON, only playback is performed using the first specification; [3] The first sensor is OFF, the second sensor is ON
Then, when the third sensor is OFF, writing and playback are performed using the second specification, and [4] When the first sensor is OFF and the second and third sensors are ON, only playback is performed using the second specification. [5] The first sensor is ON, the second sensor is OFF
[6] A recording/playback device that performs writing and playback according to the third specification when the third sensor is ON, and [6] only performs playback using the third specification when all sensors are ON. Recording and playback system. (6) The recording/reproducing system according to claim 5, wherein an identification mark is formed at the position of the write-protection window of the first recording unit of the third recording unit. (7) The recording/reproducing system according to claim 5 or 6, wherein the identification mark is a through hole formed in the case. (8) The recording medium according to any one of claims 5 to 7, wherein the recording medium is a disk-shaped recording medium.
playback system. (9) The recording/reproducing system according to claim 8, wherein the disk-shaped recording medium is a magnetic disk. (10) (a) Multiple types of recording units each having a write-protection window that can be opened and closed at a predetermined position and storing a recording medium in a case with the same basic shape, and (b) a write-protection window of the recording unit. (c) a recording/reproducing device equipped with a sensor at a corresponding position to detect that the write-protection window is open and perform write-protection; The record of the above (b) that is always open is formed.
It has a write-protection window for the playback device and a plurality of identification marks formed at unmarked positions on the case of the recording unit of (a), and at least one of these identification marks is a write-protection window that can be opened and closed. and (d) a plurality of types of other recording units each having a case having the same basic shape as the recording unit in (a) above and housing recording media with different specifications.
A sensor is provided at a position corresponding to each identification mark of the recording unit in (c), detects the openable/closable write-protection window to prohibit writing, and at the same time, the identification mark at a position corresponding to the sensor of the recording unit is provided. A recording/playback device that detects and identifies multiple types of recording units. (11) The recording/reproducing system according to claim 10, wherein the identification mark is a through hole formed in the case. (12) The recording/reproducing system according to claim 10 or 11, wherein the recording medium is a disk-shaped recording medium. (13) The recording/reproducing system according to claim 12, wherein the disk-shaped recording medium is a magnetic disk.