JP2003036126A - Scsi enclosure device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a SCSI enclosure device which eliminates the need to manually do power-ON operation although the constitution is simple. SOLUTION: The SCSI enclosure device 2 is equipped with SCSI devices 31 to 34 which are connected to a host computer 1 through a SCSI bus 11, an enclosure service processor 41 which is connected to the SCSI devices 31 and 32 and performs enclosure service processing, and a power unit 5 which supplies or cut off electric power to the SCSI devices 31 and 34 as instructed by the enclosure service processor 41. Then the enclosure service processor 41 has a function of instructing the power unit 5 to cut off the electric power to the SCSI devices 31 and 34 and supply the electric power to only the SCSI devices 31 and 32 connected to the enclosure service processor 41 a certain time later.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a SCSI enclosure device having a plurality of SCSI devices as a main component, a power supply device, a cooling device, and other necessary devices mounted in one housing.

[0002]

2. Description of the Related Art SCSI (Small Computer System Inte
rface) is a standard for connecting a small computer such as a personal computer or a workstation to a peripheral device such as a hard disk device or an optical disk device, and is generally called "scargy". A SCSI enclosure device mainly includes a plurality of hard disk devices and other SCSI devices, and a power supply device that supplies power to these SCSI devices, a cooling device that prevents overheating of the SCSI devices and power supply devices, and other necessary devices. It is installed in the housing.

The SCSI enclosure device is required to have, for example, a function of disconnecting / reconnecting each SCSI device to / from the SCSI bus, a function of setting a warning temperature and monitoring the temperature in the housing, and the like. These control managers are called SCSI Enclosure Services (SES). This S
In order to realize the ES function, the SCSI enclosure device is provided with an enclosure service processing device.

The following two conventional examples are known as techniques for allowing a host computer to access this enclosure service processing device. The first conventional example is a technique in which a host computer directly accesses a SCSI enclosure service device (FIG. 3). The second conventional example is a technique in which a host computer indirectly accesses the enclosure service processing device (FIG. 4). Each technology will be described in detail below.

FIG. 3 is a block diagram showing a first conventional example of a SCSI enclosure device. Hereinafter, description will be given with reference to this drawing.

The SCSI enclosure device 21 is an SC
SCSI devices 31 to 34 connected to the host computer 1 via the SI bus 11, a SCSI enclosure service device 42 connected to the host computer 1 via the SCSI bus 11 and executing enclosure service processing, and a SCSI enclosure service A power supply device 5 for supplying or shutting off power to the SCSI devices 31 to 34 according to an instruction from the device 42.

The host computer 1 operates as a SCSI initiator. The power supply device 5 is a power supply control line 5
1 is connected to the SCSI enclosure service device 42 through the power supply line 52, and the SCSI device 31,
32, and is connected to the SCSI devices 33 and 34 via the power supply line 53. The SCSI enclosure device 21 also includes a cooling device 6. Cooling device 6
Is a fan that cools the inside of the housing, for example, and is controlled by the SCSI enclosure service device 42.

In the SCSI enclosure device 21, S
A dedicated SCSI enclosure service device 42 on the same line as the plurality of SCSI devices 31 to 34 on the CSI bus 11.
Are connected. Therefore, the host computer 1
By directly accessing the SCSI enclosure service device 42, the processing of the SES function can be executed.

FIG. 4 is a block diagram showing a second conventional example of a SCSI enclosure device. Hereinafter, description will be given with reference to this drawing.

The SCSI enclosure device 22 is an SC
SCSI devices 31-34 connected to the host computer 1 via the SI bus 11, and SCSI devices 31, 32
Connected to the enclosure service processing device 41a for executing the enclosure service processing, and the SC according to the instruction of the enclosure service processing device 41a.
The power supply device 5 that supplies or cuts off power to the SI devices 31 to 34 is provided.

Host computer 1, SCSI bus 1
1, SCSI devices 31 to 34, power supply device 5, cooling device 6, power supply control line 51, and power supply lines 52 and 53
Has the same function as the first conventional example. The enclosure service processing device 41a and the SCSI devices 31 and 32 are
It is connected via the enclosure service interface 7.

When used in an actual OS environment, the SCSI enclosure device 21 shown in FIG. 3 requires a dedicated driver in order for the host computer 1 to directly access the SCSI enclosure service device 41, resulting in higher cost. There's a problem. On the other hand, in the SCSI enclosure device 22 shown in FIG. 4, since the host computer 1 accesses the enclosure service processing device 41 via the SCSI device 31 or the SCSI device 32, there is an advantage that it can be configured only with an existing driver.

[0013]

Now, as a vendor-specific function, SCSI connected to a host computer is used.
In order to disconnect the device surely and stop the SCSI device, the power supply of the SCSI device may be turned off / on from the host computer.

SCSI enclosure device 2 shown in FIG.
In 1, the host computer 1 sends a command directly to the SCSI enclosure service device 42, the SCSI enclosure service device 42 issues an instruction to the power supply device 5 through the power supply control line 51, and the power supply lines 52 and 53 are turned off / on according to the instruction. , By this SC
The SI devices 31 to 34 are powered off / on.

However, in the SCSI enclosure device 22 shown in FIG. 4, the host computer 1 is the SCS.
A command is sent to the I device 31 or the SCSI device 32, and the enclosure service processing device 41a is powered off / on through the SCSI device 31 or the SCSI device 32.
Receive the command. For example, when there is an instruction to turn off the power of the power supply line 52, the power supply line 52 is turned off according to the instruction. As a result, the SCSI device 31,
Since the power of 32 is cut off, the command cannot be received from the host computer 1 thereafter. Further, since the command cannot be received, it is not possible to instruct the SCSI devices 31 and 32 to turn on the power, so that a manual power-on operation is required.

[0016]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to have a simple structure but to eliminate the need for a manual power-on operation.
To provide a SCSI enclosure device.

[0017]

A SCSI enclosure device according to the present invention includes a plurality of SCSI devices connected to a host computer via a SCSI bus, and at least one of these SCSI devices and an enclosure service. An enclosure service processing device that executes a process and a power supply device that supplies or cuts off power to the SCSI device according to an instruction from the enclosure service processing device are provided. Then, the enclosure service processing device instructs the power supply device to cut off power to the SCSI device, and after a certain period of time has passed, the power supply device instructs the power supply device to supply power only to the SCSI device connected to the enclosure service processing device. It has an instruction function (Claim 1).

A command for cutting off the power to the SCSI device is output from the host computer to the enclosure service processing device through some of the SCSI devices.
Then the enclosure service processor will
The power supply is instructed to cut off power to the device, and after a certain period of time, the power supply is instructed to supply power only to the SCSI device connected to the enclosure service processing device. The enclosure service processor is
Since it is connected to the host computer via some SCSI devices, no dedicated driver is required. Moreover, even if the power to all the SCSI devices is cut off, the power is supplied only to the SCSI devices necessary for the communication between the host computer and the enclosure service processing device, so that the enclosure service processing can be executed.

The enclosure service processing device may be provided with a timer for measuring a fixed time (claim 2). At this time, the enclosure service processing device instructs the power supply device to cut off the power to the SCSI device and at the same time outputs an initialization start signal to the timer, and the timer initializes the count value when the initialization start signal is input. When the count value reaches the set value, the set value arrival signal is output to the enclosure service processing unit. When the set service arrival signal is input, the enclosure service processing unit is connected to the enclosure service processing unit. The power supply device may be instructed to supply power only to the SCSI device (claim 3).

The power supply unit supplies or cuts off power to the SCSI device connected to the enclosure service processing unit through the first power line, and supplies power to the SCSI unit not connected to the enclosure service processing unit. The power may be supplied or cut off via the second power supply line (claim 4). At this time, the power supply is SC
When the enclosure service processing device instructs the SI device to cut off power, the SCSI device connected to the enclosure service processing device cuts off power to the SCSI device via the first and second power supply lines. When the enclosure service processing device instructs to supply power only to the SCSI device, power may be supplied only to the SCSI device via the first power supply line (claim 5).

Further, the SCSI device may be a hard disk device (claim 6).

In other words, the SCSI enclosure device according to the present invention comprises a plurality of SCSI devices, an enclosure service processing device which is connected to a part of the SCSI devices through an interface different from SCSI, and which executes an enclosure service process, and a timer. , A timer control line that connects the enclosure service processing device to the timer and sends / receives each signal of initialization / starting of the timer and reaching the set value from the timer, and turning off / on the SCSI device according to the instruction of the enclosure service processing device.
And a power supply device. Then, from the host computer to the enclosure service processing device via some SCSI devices, the power of some of the SCSI devices is turned off.
Command is output. Then, the enclosure service processing device issues an instruction to turn off the power of some SCSI devices, and at the same time, initializes and starts the timer. After a while, when the count value of the timer reaches the set value, the signal is transmitted from the timer to the enclosure service processing device, and the enclosure service processing device issues an instruction to turn on the power of some SCSI devices.

By doing so, even if some SCSI devices cannot receive the command from the host computer due to the power-off instruction, the power is automatically turned on after a certain time. The service processor can receive the command again.

[0024]

FIG. 1 is a block diagram showing an embodiment of a SCSI enclosure device according to the present invention. Hereinafter, description will be given with reference to this drawing.

The SCSI enclosure device 2 is an SCS.
SCSI devices 31 to 34 connected to the host computer 1 via the I-bus 11, enclosure service processing devices 41 connected to the SCSI devices 31 and 32 and executing enclosure service processing, and instructions of the enclosure service processing device 41 Power supply device 5 for supplying or shutting off power to the SCSI devices 31 to 34 according to
It has and. Then, the enclosure service processing device 41 instructs the power supply device 5 to cut off the power to the SCSI devices 31 to 34, and after a certain period of time, the SCS connected to the enclosure service processing device 41.
It has a function of instructing the power supply device 5 to supply power only to the I devices 31 and 32.

The enclosure service processor 41 is provided with a timer 8 for measuring a fixed time. Then, the enclosure service processing device 41 uses the SCS
At the same time as instructing the power supply device 5 to cut off the power to the I devices 31 to 34, an initialization start signal is output to the timer 8. The timer 8 initializes the count value and starts counting when the initialization start signal is input, and outputs the set value arrival signal to the enclosure service processing device 41 when the count value reaches the set value. Upon receiving the set value reaching signal, the enclosure service processing device 41 instructs the power supply device 5 to supply power only to the SCSI devices 31 and 32 connected to the enclosure service processing device 41.

The power supply device 5 supplies or cuts off power to the SCSI devices 31 and 32 connected to the enclosure service processing device 41 through the power supply line 52, and is not connected to the enclosure service processing device 41.
Electric power is supplied to or cut off from the CSI devices 33 and 34 via the power supply line 53. At this time, the power supply device 5 is
When the enclosure service processing device 41 instructs the CSI devices 31 to 34 to cut off power, the power is cut off to the SCSI devices 31 to 34 via the power supply lines 52 and 53, and the enclosure service processing device 4 is cut off.
When the enclosure service processing device 41 instructs to supply power only to the SCSI devices 31 and 32 connected to the SCSI device 1, the SCSI device 3 is connected via the power line 52.
Power is supplied only to 1, 32.

The SCSI devices 31 to 34 are all hard disk devices. Host computer 1 is SCS
It operates as an I initiator. The enclosure service processing device 41 and the SCSI devices 31, 32 are connected via the enclosure service interface 7. The timer control line 81 is for transmitting and receiving an initialization start signal to the timer 8 and a set value reaching signal from the timer 8. The cooling device 6 is, for example, a fan that cools the inside of the housing, and is controlled by the enclosure service processing device 41.

FIG. 2 is a flow chart showing an example of the operation of the enclosure service processing device 41. Less than,
A description will be given based on FIGS. 1 and 2.

First, the enclosure service processing device 4
1 receives a power-off command for the SCSI devices 31, 32 from the host computer 1 through the SCSI device 31 or SCSI device 32 (step 101). Subsequently, when the enclosure service processing device 41 recognizes that the command is a power-off instruction for the SCSI devices 31 and 32, it issues a power-off instruction for the power supply line 52 to the power supply device 5 through the power supply control line 51. At the same time, an initialization start signal is issued to the timer 8 through the timer control line 81 (step 102). Power supply 5
Shuts down the power supply to the power supply line 52 in accordance with the instruction, so that the SCSI devices 31 and 32 are powered off. Timer 8
Initializes the count value according to the initialization start signal and starts counting, and when the count value reaches a preset value, transmits a set value arrival signal to the enclosure service processing device 41 through the timer control line 81, Stop itself. The enclosure service processing device 41 receives the set value reaching signal from the timer 8 (step 1
03), the power ON instruction for the power supply line 52 is issued to the power supply device 5 through the power supply control line 51 (step 104). The power supply device 5 restarts the power supply to the power supply line 52 according to the instruction, so that the SCSI devices 31 and 32 are powered on. As a result, the SCSI devices 31 and 32 and the enclosure service processing device 41 can receive commands from the host computer 1.

Needless to say, the present invention is not limited to the above embodiment. For example, the set value of the timer 8 is fixed or variable because it is determined by the guaranteed shutdown time of the SCSI devices 31 and 32. Also,
In the above embodiment, the two SCSI devices 31 and 32 are described so that they can be turned off / on by one power supply line 52, but they may be controlled by using different power supply lines. Further, although the power supply line 53 controls the turning off / on of the SCSI devices 33 and 34 and is not concerned with the control of the SCSI devices 31 and 32, it is common to turn off and turn on the SCSI devices 31 to 34 at the same time. You may.

[0032]

According to the SCSI enclosure device of the present invention, the enclosure service processing device is connected to the host computer via a part of the SCSI device,
Moreover, even if the power to all SCSI devices is cut off,
Since only the SCSI devices required for communication between the host computer and the enclosure service processing device are supplied with power, the enclosure service process can be executed at any time. Therefore, a dedicated driver for connecting to the host computer is not required in the enclosure service processing device, so that a simple configuration can be realized. In addition to this,
Since the power is automatically resupplied only to the SCSI device required for the communication between the host computer and the enclosure service processing device, the manual power-on operation can be dispensed with.

In other words, according to the SCSI enclosure device according to the present invention, even if the host computer instructs the enclosure service processing device to turn off the power of the SCSI device through a part of the SCSI devices, the SCSI device of the SCSI device will be removed after a certain period of time. Since the power is restarted, the SES instruction can be issued from the host computer to the enclosure service processing device via the SCSI device again. Moreover, since the power is automatically restarted, it is not necessary to manually restart the power supply to the SCSI device.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a SCSI enclosure device according to the present invention.

FIG. 2 is a flowchart showing an example of the operation of the enclosure service processing device in the embodiment of FIG.

FIG. 3 is a block diagram showing a first conventional example of a SCSI enclosure device.

FIG. 4 is a block diagram showing a second conventional example of a SCSI enclosure device.

[Explanation of symbols]

1 Host computer 11 SCSI bus 2 SCSI enclosure device 31-34 SCSI device 41 Enclosure service processor 5 power supply 52,53 Power line 8 timer

Claims (6)

[Claims] 1. A plurality of SCSI devices connected to a host computer via a SCSI bus and their SCSs.
I SCSI device comprising: an enclosure service processing device connected to at least one of the I devices and executing an enclosure service process; and a power supply device for supplying or cutting off power to the SCSI device according to an instruction of the enclosure service processing device. In the enclosure device, the enclosure service processing device is the SCSI device.
It has a function of instructing the power supply device to cut off power to the device, and instructing the power supply device to supply power only to the SCSI device connected to the enclosure service processing device after a lapse of a certain time. A SCSI enclosure device characterized by the following. 2. The SCSI enclosure device according to claim 1, wherein the enclosure service processing device is provided with a timer for measuring the fixed time. 3. The enclosure service processing device outputs an initialization start signal to the timer at the same time as instructing the power supply device to cut off power to the SCSI device, and the timer starts the initialization start signal. When a signal is input, the count value is initialized and counting is started, and when the count value reaches a set value, a set value arrival signal is output to the enclosure service processing device, and the enclosure service processing device, the set value arrival signal 3. The SCSI enclosure device according to claim 2, wherein the input causes the power supply device to supply power only to the SCSI device connected to the enclosure service processing device. 4. The power supply device supplies or cuts off power to the SCSI device connected to the enclosure service processing device via a first power supply line, and is not connected to the enclosure service processing device. The SCSI enclosure device according to claim 1, 2 or 3, wherein electric power is supplied to or cut off from the SCSI device via a second power supply line. 5. The power supply device supplies power to the SCSI device via the first and second power supply lines when instructed by the enclosure service processing device to cut off power to the SCSI device. And the enclosure service processing device is instructed to supply power only to the SCSI device connected to the enclosure service processing device, the power is supplied only to the SCSI device via the first power line. The SCSI enclosure device according to claim 4, further comprising: 6. The SCSI enclosure device according to claim 1, 2, 3, 4, or 5, wherein the SCSI device is a hard disk device.