JP2530897B2 - Storage device - Google Patents

Description

Detailed Description [Table of Contents] Outline Industrial field of application Conventional technology (Fig. 5) Problem to be solved by the invention Means for solving the problem (Fig. 1) Operation Example (a) One Description of Configuration of Embodiment (FIGS. 2 and 3) (b) Description of Operation of One Embodiment (FIG. 4) (c) Description of Other Embodiments [Outline of Invention] [Outline] Regarding a storage device that cools the inside of a device equipped with a storage mechanism with two cooling mechanisms, for the purpose of performing sufficient cooling, reducing noise and saving power, a storage medium rotated by a spindle motor,
A memory mechanism for positioning the head by the positioning mechanism,
A drive circuit that drives the spindle motor and the positioning mechanism, a control circuit that controls the storage mechanism, a first power supply that supplies power to the drive circuit, and a second power supply that supplies power to the control circuit. A drive circuit, a first power supply, a first cooling mechanism for cooling the storage mechanism, the control circuit, and a second
And a temperature detector for the first power source, and the output of the temperature detector controls the first cooling mechanism.

[Industrial applications]

The present invention relates to a storage device that cools the inside of a device provided with a storage mechanism such as a magnetic disk mechanism by two cooling mechanisms.

A storage mechanism for positioning a head on a storage medium such as a magnetic disk mechanism is widely used as an external storage device of a computer system.

In particular, a large-sized magnetic disk device usually has 4 to 8 magnetic disks built in a locker and is assembled.

With the increase in size of computer systems in recent years, a large amount of magnetic disk devices are used, and the ratio of them in the computer room is increasing.

For this reason, magnetic disk devices, particularly collective magnetic disk devices, are required to have a smaller installation area, power consumption, and lower noise than ever before.

In order to reduce the installation area, it is sufficient to realize high-density mounting in the locker.

In high-density mounting, a large number of heat-generating elements are provided in the locker, so it is necessary to keep the temperature low in order to prevent thermal off-track of the magnetic disk mechanism and improve reliability. The fan also needs a powerful one, and it is required to solve the increasing noise due to this.

[Conventional technology]

 FIG. 5 is an explanatory diagram of a conventional technique.

In the figure, 1a and 1b are disk enclosures (magnetic disk mechanisms) for positioning a head on a storage medium rotated by a spindle motor by a positioning mechanism, 2a,
2b is a power amplifier (driving circuit) that drives the spindle motor and the positioning mechanism of the disk enclosures 1a and 1b. 3a and 3b are power supplies, and power of the power amplifiers 2a and 2b and a control circuit described later. What to supply,
4a and 4b are control circuits, and disk enclosures
It controls each part of 1a and 1b.

5a and 5b are first cooling fans, respectively, which cool the disk enclosures 1a and 1b, power amplifiers 2a and 2b, and power supplies 3a and 3b, and 6a and 6b are second cooling fans,
It is for cooling the control circuits 4a and 4b.

In this conventional example, a collective magnetic disk device in which two disk enclosures 1a and 1b are mounted in a rocker LK is shown, and each unit is hierarchically accommodated to realize high-density mounting.

Conventionally, the power supplies 3a and 3b are for the control circuits 4a and 4b (+ 5V, −
5.2V, ± 12V) and power amplifiers 2a, 2b (± 24V) were all integrated into a single power supply.

Further, the power supplies 3a and 3b, the power amplifiers 2a and 2b, and the disk enclosures 1a and 1b are the same cooling fans 5a and 5b.
Was cooling in.

This was to reduce the number of fans and to cool efficiently.

[Problems to be Solved by the Invention]

By the way, if the number of fans is reduced in this way, a powerful cooling fan is required, and noise increases.

In the conventional technology, the disk enclosures 1a and 1b are not operating, that is, the spindle motor is stopped,
Even when the seek operation by the positioning mechanism is not performed, the control circuits 4a and 4b need to operate for communication with the host (reporting the status, etc.), so that the power supply by the power sources 3a and 3b cannot be stopped.

Therefore, the power supplies 3a and 3b generate heat, so the cooling fan 6
Not only a and 6b, but also the cooling fans 5a and 5b had to be always operated at a constant steady speed.

As a result, there is a problem that noise is large and power is consumed not only when the disk enclosures 1a and 1b are operating but also when the disk enclosures are not operating.

Therefore, it is an object of the present invention to provide a storage device that can perform sufficient cooling, reduce noise, and save power.

[Means for solving the problem]

 FIG. 1 is a principle diagram of the present invention.

The present invention, as shown in FIG.
The storage mechanism 1a for positioning the head 13 by the positioning mechanism 12 with respect to the storage medium 11 rotated by the drive circuit 2a for driving the spindle motor 10 and the positioning mechanism 12
A control circuit 4a for controlling the storage mechanism 1a and the drive circuit
A first power supply 30a for supplying power to the control circuit 4a, a second power supply 31a for supplying power to the control circuit 4a, the drive circuit 2a, the first power supply 30a, and a first cooling unit for cooling the storage mechanism 1a. Cooling mechanism 5
a for cooling the control circuit 4a and the second power supply 31a
The cooling mechanism 6a and the temperature detector 7a of the high-voltage power supply 30a are provided, and the output of the temperature detector 7a controls the first cooling mechanism 5a.

[Action]

In the present invention, the power source is the second power source 31 for the control circuit 4a (4b).
a (31b) and the first power source 30a (30) for the drive circuit 2a (2b)
b) and the first cooling power source 30a (30b), the drive circuit 2a (2b), and the storage mechanism 1a (1b), which are necessary for the operation of the storage mechanism 1a (1b), are the same cooling mechanism 5a. (5b) is used for cooling, and the control circuit 4a (4b) and the second power source 31a (31b) are different cooling mechanisms 6a.
It was cooled in (6b).

Thereby, the cooling mechanism 5a (5b) can be independently controlled according to the operation of the storage mechanism 1a (1b).

Next, the temperature detector 7a (7b) is provided in the first power supply 30a (30b), and the cooling mechanism 5a (5b) is controlled by the temperature detector 7a (7b), whereby the cooling operation is performed according to the operation of the storage mechanism 1a (1b). Control and provide sufficient cooling, noise is kept to a minimum and power to the cooling mechanism can be saved.

It should be noted that the temperature of the first power supply 30a (30b) is detected by the operation because the storage mechanism 1a (1b) and the drive circuit 2a (2b) simultaneously generate heat, and the first power supply 30a (30b) generates heat. This is because can be detected in an integrated form, and can be detected easily and accurately.

〔Example〕

(A) Description of configuration of one embodiment FIG. 2 is a configuration diagram of one embodiment of the present invention, showing a collective type magnetic disk device having four magnetic disk mechanisms, and FIG. FIG. 2 (B) is a side view thereof,
2 (C) is a front view thereof, and FIG. 2 (D) is a top view thereof.

In the figure, the same components as those shown in FIGS. 1 and 5 are designated by the same symbols.

The rocker LK has a three-stage configuration, and in the upper stage, the control circuits (printed boards) 4a to 4d of the disk enclosures 1a to 1d on the front side, + 5V, -5.2V for the control circuits 4a to 4d,
A low voltage (second) power supply 31a to 31d for generating ± 12V and cooling fans 6a to 6d for these are provided, and a disk switch control circuit and a power supply 8 for switching the disk enclosures 1a to 1d are provided on the back side thereof. These cooling fans 8a are provided.

In the middle, the disk enclosure 1b on the front side, the drive circuit 2a for the disk enclosure 1a, and the temperature detector 7a
And + 24V high voltage (first) power supply 3 for drive circuit 2a
0a is provided and the disk enclosure 1d is on the back side
A drive circuit 2c for the disk enclosure 1c, a temperature detector 7c, and a high-voltage (first) power supply 30c for the drive circuit 2c.

At the bottom, the disk enclosure 1a on the front side, the drive circuit 2b for the disk enclosure 1b, and the temperature detector 7b
And a high voltage (first) power supply 30b for the drive circuit 2b,
A cooling fan 5b is provided.

A disk enclosure 1c on the back side, a drive circuit 2d for the disk enclosure 1d, a temperature detector 7d, a high-voltage (first) power supply 30d for the drive circuit 2d, and a cooling fan 5
d is provided.

Furthermore, the cooling fan 5a is located directly below the lower disk enclosure 1a, and the cooling fan is located directly below the disk enclosure 1c.
5c is provided.

Therefore, in the configuration of FIG. 2, four disk enclosures 1a to 1d are mounted in the middle and lower stages of the front and back of the rocker LK, and drive circuits 2a to 2d for each disk enclosure 1a to 1d and high voltage power supply 30a to 30d is mounted above or below each disk enclosure 1a-1d, and cooling fans 5a-5d
Is provided immediately below the disk enclosures 1a to 1d.

Each cooling fan 5a-5d blows air from the bottom to the top to cool the corresponding disk enclosures 1a-1d, drive circuits 2a-2d, and high-voltage power supplies 30a-30d.

On the other hand, each disk enclosure 1a provided in the upper stage
The control circuits 4a to 4d and the low-voltage power supplies 31a to 31d of ~ 1d are air-cooled by the cooling fans 6a to 6d that blow air from bottom to top.

FIG. 3 is a block diagram of an embodiment of the present invention, showing only one disk enclosure 1a and a circuit or the like corresponding thereto, and the same applies to other disk enclosures and the like.

In the figure, the same components as those shown in FIGS. 1, 2 and 5 are designated by the same symbols.

The disk enclosure 1a includes a magnetic head 1 supported by a carriage 12b that is moved by a motor (voice coil motor) 12a, which is a positioning mechanism 12, on each track of a magnetic disk 11 rotated by a spindle motor 10.
Position 3 (seek).

The drive circuit 2a includes a power amplifier 20 for driving the spindle motor 10 and a power amplifier 21 for driving the motor (VCM) 12a, and high voltage power of ± 24V is supplied from the high voltage power supply 30a.

The control circuit 4a performs interface control with the host, read / write control of the magnetic head 13, positioning control of the motor 12a via the power amplifier 21, rotation control of the spindle motor 10 via the power amplifier 20, and the like +5 of the low voltage power supply 31a.
Performed by receiving low voltage power of V, -5.2V, ± 12V.

The high-voltage power supply 30a is composed of a series dropper type, and has a rectifier circuit DC that exchanges alternating current with direct current, and a direct current stabilization circuit VC in which a control transistor Tr is provided in series with a load.

A temperature detector 7a such as a thermistor is provided near the control transistor Tr, and the fan control circuit 70 controls the rotation speed of the cooling fan 5a by the output of the temperature detector 7a.

The cooling fan 6a is constantly rotating as long as the power is on.

(B) Description of operation of one embodiment FIG. 4 is an operation explanatory view of one embodiment of the present invention. FIG. 4 (A) is an output characteristic diagram of the control circuit 70, and FIG. 4 (B) is a cooling fan. It is an operation characteristic view of 5a.

When the spindle motor 10 of the disk enclosure 1a rotates and the positioning (seek) operation by the positioning mechanism 12 starts, current flows from the high voltage power supply 30a to the power amplifiers 20 and 21 that drive it, and the high voltage power supply 30a and the power amplifier 30a. Both 20 and 21 generate heat.

On the other hand, the temperature of the disk enclosure 1a rises due to the heat generation of the motor 10 itself by the rotation of the spindle motor 10, the frictional heat of the magnetic disk 11 and the air, and the heat generation of the motor 12 by seeking.

In such a case, the temperature of the power transistor Tr in the high-voltage power supply 30a also rises, so the temperature is detected by the temperature detector 7a, and the fan control circuit 70 exhibits the output characteristic of FIG. 4 (A).

The output voltage of the fan control circuit 70 controls the rotation of the cooling fan 5a as shown in FIG. 4 (B).

Therefore, when the temperature rises, the rotation speed of the cooling fan 5a rises, the cooling capacity increases, and the temperature rises of the power amplifiers 20 and 21 and the disk enclosure 1a of the high-voltage power supply 30a can be kept to a minimum. .

In addition, when the seek operation is not in progress or the spindle motor 10
When the temperature is low, such as when the
The rotation speed of the cooling fan 5a decreases, noise can be kept to a minimum, and the power of the cooling fan 5a can be saved.

In this case, the control circuit 4a and the low voltage power supply 31a are connected to the cooling fan 6
Since it is sufficiently cooled by a, it does not interfere with their operation.

In this example, when the temperature is the lowest, the cooling fan 5a is stopped, so that it is possible to further reduce noise and save power.

In this way, the cooling fan is operated at an optimum rotation speed according to the operations of the disk enclosure, the high voltage power supply, and the power amplifier to obtain the required cooling effect, and also noise is reduced and power is saved.

Moreover, since the temperature of the control transistor Tr of the high-voltage power supply 30a is detected, the heat generation state proportional to the load current can be detected in an integrated form, and can be easily detected with character.

(C) Description of Other Embodiments In the above embodiments, the collective type magnetic disk device has been described, but it may be one magnetic disk device,
The invention is not limited to magnetic disks, but can be applied to known storage mechanisms such as optical disks and magneto-optical disks.

Also, although the temperature detector has been described using a thermistor, a well-known temperature sensor such as a semiconductor sensor can be used, and the high-voltage power supply is not limited to the series dropper type, but a well-known type such as a switching type or a CVT type can be used. Also, the temperature detection position may be any position as long as it generates heat in proportion to the load current.

Further, when the temperature is low, the cooling fan is controlled to stop, but the cooling fan may be rotated at the minimum rotation speed, and the rotation speed control is not limited to the proportional one according to the temperature, but the high and low It may be in the form of two steps or three steps of high, middle and low.

Although the present invention has been described with reference to the embodiments, the present invention can be variously modified according to the gist of the present invention, and these modifications are not excluded from the present invention.

〔The invention's effect〕

As described above, according to the present invention, the power source is separated into the control circuit and the storage mechanism, and the cooling place of the cooling mechanism is shared. Therefore, the cooling mechanism is independent depending on the operation of the storage mechanism or the like. Can be controlled to achieve the effects of noise reduction and power saving.

Even in this case, since the storage mechanism and the like are sufficiently cooled, the temperature change can be reduced, the thermal off-track and the like can be reduced, and the reliability can be improved.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention, FIG. 2 is a configuration diagram of an embodiment of the present invention, FIG. 3 is a block diagram of an embodiment of the present invention, and FIG. 4 is an operation explanatory diagram of an embodiment of the present invention. FIG. 5 is an explanatory diagram of a conventional technique. In the figure, 1a to 1d ... Storage mechanism (disk enclosure),
2a to 2d ... Drive circuit, 4a to 4d ... Control circuit, 5a to 5d ... First cooling mechanism, 6a to 6d ... Second cooling mechanism, 7a to 7b ... Temperature detector, 10 ... Spindle motor, 11 ... Memory Medium (magnetic disk), 12 ... Positioning mechanism, 13 ... Head (magnetic head),
30a-30d ... 1st power supply, 31a-31d ... 2nd power supply.

Claims (1)

(57) [Claims] A storage mechanism (1a) for positioning a head (13) by a positioning mechanism (12) with respect to a storage medium (11) rotated by a spindle motor (10), the spindle motor (10) and a positioning mechanism. A drive circuit (2a) for driving (12), a control circuit (4a) for controlling the storage mechanism (1a), and a first power supply (30a) for supplying electric power to the drive circuit (2a).
And a second power supply (31a) for supplying power to the control circuit (4a)
A drive circuit (2a), a first power supply (30a), a first cooling mechanism (5a) for cooling the storage mechanism (1a), the control circuit (4a), and a second power supply ( 31a) is provided with a second cooling mechanism (6a) and a temperature detector (7a) of the first power source (30a), and the first cooling is performed by the output of the temperature detector (7a). A storage device characterized by controlling a mechanism (5a).