JP2530898B2 - Storage device - Google Patents

Description

DETAILED DESCRIPTION [Table of Contents] Outline Industrial field of application Conventional technology (Fig. 4) Problem to be solved by the invention Means for solving the problem (Fig. 1) Operation Example (a) One Description of Embodiments (FIGS. 2 and 3) (b) Description of Other Embodiments [Effect of the Invention] [Outline] A storage device that cools the inside of a device having a storage mechanism such as a magnetic disk mechanism by two cooling mechanisms With respect to the above, with the aim of performing sufficient cooling, reducing noise and saving power when not in use, a storage mechanism for positioning the head by a positioning mechanism on a storage medium rotated by the spindle motor, and the spindle motor and A drive circuit that drives the positioning mechanism, a control circuit that controls the storage mechanism, a first power supply that supplies power to the drive circuit, a second power supply that supplies power to the control circuit, and the drive circuit , A first power source, a first cooling mechanism for cooling the storage mechanism, a second cooling mechanism for cooling the control circuit and a second power source, and a switch for operating / stopping the storage mechanism And the operation of the first power supply and the first cooling mechanism is stopped by turning off the switch.

[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. 4 is an explanatory diagram of the prior art.

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 disclosures 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 technique, when only the disk enclosures 1a and 1b are not used, that is, even when the spindle motor is stopped or when the seek operation by the positioning mechanism is not used, the control circuits 4a and 4b have a higher rank. Power supply 3a, 3b because it needs to operate for communication (report of status, etc.)
Cannot stop the power supply.

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 even when the disk enclosures 1a and 1b are not used.

Therefore, it is an object of the present invention to provide a storage device that can perform sufficient cooling, reduce noise when not in use, 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.
A storage mechanism 1a for positioning the head 13 by the positioning mechanism 12, a drive circuit 2a for driving the spindle motor 10 and the positioning mechanism 12, and a control circuit 4a for controlling the storage mechanism 1a on the storage medium 11 rotated by the A first power supply 30a for supplying power to the drive circuit 2a, a second power supply 31a for supplying power to the control circuit 4a, the drive circuit 2a, the first power supply 30a, and the storage mechanism 1a. A first cooling mechanism 5a for cooling,
The control circuit 4a, a second cooling mechanism 6a for cooling the second power supply 31a, and a switch 7a for operating / stopping the storage mechanism 1a are included. The operation of the power source 30a and the first cooling mechanism 5a is stopped.

[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).

Therefore, by using the switch 7a (7b), the spindle motor
When 10 is stopped, the first power supply 30a (30b) is stopped, and cooling is no longer required, so the first cooling mechanism 5a (5b) can also be stopped, reducing noise and saving power. It will be possible.

〔Example〕

(A) Description 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. 2 (A) is a rear view thereof. 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 4 are denoted by the same symbols.

The rocker LK has a three-stage configuration. On the upper side, the control circuits (printed boards) 4a to 4d of the disk enclosures 1a to 1d on the back side and + 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 on the front side, and these. The cooling fan 8a and the start / stop switches 7a to 7d for the disk enclosures 1a to 1d are provided.

In the middle, a disk enclosure 1b is provided on the back side, a drive circuit 2a for the disk enclosure 1a and a + 24V high-voltage (first) power supply 30a for the drive circuit 2a are provided, and a disk enclosure 1d and a disk enclosure 1c are provided on the front side. Drive circuit 2c and high-voltage (first) power supply 30c for drive circuit 2c
Is provided.

At the bottom, a disk enclosure 1a, a drive circuit 2b for the disk enclosure 1b, a high-voltage (first) power supply 30b for the drive circuit 2b, and a cooling fan 5b are provided on the back side.

A disk enclosure 1c on the front 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 4 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.

When the switch 7a is turned off, the control circuit 4a turns on the high voltage power supply.
30a is turned off, and power supply to the drive circuit 2a and the cooling fan 5a is stopped.

 Next, the operation of FIG. 3 will be described.

When the switch 7a is turned on, the high voltage power supply 30a is turned on and the spindle motor 10a of the disk enclosure 1a is turned on.
When the rotating mechanism 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 amplifiers 20 and 21 also 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 12a by seeking.

Since the high-voltage power supply 30a supplies power to the cooling fan 5a, the cooling fan 5a rotates and the high-voltage power supply 30a and the power amplifiers 20 and 21 are connected.
The disk enclosure 1a and the disk enclosure 1a are cooled, and the temperature rise of each can be suppressed to the minimum.

When the disk enclosure 1a is not used,
The switch 7a is turned off, so that the control circuit 4a turns off the high-voltage power supply 30a and stops the power supply to the drive circuit 2a and the cooling fan 5a.

Therefore, the noise of the cooling fan 5a is eliminated and the electric power can be saved.

In this case, the control circuit 4a and the low-voltage power supply 31a, which cannot stop the operation due to communication with the host, are cooled by the cooling fan 6a.
As they are sufficiently cooled, they do not interfere with their operation.

In this way, when the disk enclosure 1a is used, it is sufficiently cooled by the cooling fan 5a, and when not used, the cooling fan 5a can be stopped to reduce noise and save power.

(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.

Further, in the above-described embodiment, the cooling fan 5 is driven by the high voltage power source 30a.
Although the cooling fan 5a is stopped by supplying power to a and turning off the high voltage power supply 30a, the control circuit 4a may directly turn off the cooling fan 5a.

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 location of the cooling mechanism is shared. Therefore, the cooling is performed according to the operation of the storage mechanism by the switch. The mechanism can be controlled independently, resulting in 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 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 ... switch, 10 ... spindle motor, 11 ... storage medium ( Magnetic disk), 12 ... Positioning mechanism, 13 ... Head (magnetic head),
30a-30d ... 1st power supply, 31a-31d ... 2nd power supply.

Claims (1)

(57) [Claims] 1. A storage mechanism (1a) for positioning a head (13) by a positioning mechanism (12) on a storage medium (11) rotated by a spindle motor (10), the spindle motor (10) and a positioning mechanism (1a). Drive circuit (2a) for driving the drive circuit, a control circuit (4a) for controlling the storage mechanism (1a), and a first power supply (30a) for supplying 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 source (30a) and a storage mechanism (1
a) a first cooling mechanism (5a) for cooling the control circuit (4a), a second power source (31a) for cooling the second cooling mechanism (6a), and the storage mechanism (1a) Switch to activate / deactivate (7
a), and the first power source (30a) when the switch (7a) is turned off.
And the operation of the first cooling mechanism (5a) is stopped.