JPH05346893A - Scsi phase transition testing device - Google Patents

Abstract

PURPOSE:To efficiently execute a testing work without spending time by registering in advance correct phase transition and command information, executing various operation by a target device in accordance with its content, and on the other hand, executing an operation corresponding to the actual phase transition, in the case the actual phase transition is different from the correct phase transition. CONSTITUTION:A processor 1 is a microcomputer system, and executes a test program for testing an SCSI(small computer system interface) device 5. First of all, each parameter corresponding to an operation desired to allow the device 5 to execute is inputted from an input device 4, and stored as a phase entry file in an external storage device 2. Correct phase transition and command information corresponding to each operation of a test item are registered in advance as a phase entry file, and in accordance therewith, the device 5 is allowed to execute to execute various operations. Also, in the case the actual phase transition is different from the correct phase transition, various operations are executed in accordance with the actual phase transition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to SCSI (Small).
Computer System In-terfa
(c) a SCSI phase transition test device for testing a phase transition which is a communication sequence of various devices.

[0002]

2. Description of the Related Art Generally, a computer system is constructed by connecting various peripheral devices to a host device. When an operation abnormality occurs in such a computer system or when designing and developing peripheral devices, the peripheral devices are connected to a test device, a running test is executed, and the device function and quality are evaluated. ..

By the way, in recent years, SCSI is often adopted as an interface with a host device of various peripheral devices such as a magnetic disk device, an optical disk device, an image scanner or a printer.

Now, it is assumed that a storage device such as a magnetic disk device is connected to the host device by a SCSI bus. Then, for example, it is assumed that the host device reads data from the storage device. In this case, the host device is the initiator and the storage device is the target, and each phase operation is executed in a fixed procedure.

Now, assuming that each phase operation is executed without abnormality, the phase transition is as shown in FIG. That is, initially, the SCSI bus is a bus free phase (bus free ph) that is unused.
as)). Here, the initiator is the arbitration phase (arbitration).
start) to acquire the bus use right. next,
Selection phase
se) to select the target. This operation is set for the case where a plurality of target devices are connected. Then, a command phase is executed to send a data read command. After this command phase, control of the bus is transferred to the target side. Next, the target is the data in phase (datain).
phase) is executed and predetermined storage data is sent to the initiator. After this, the status phase (st
atus phase) to report the execution result of the storage data transfer operation to the initiator. Then the message in phase
asase) is executed to report the sequential execution result of each phase. Then return to the bus free phase.

By the way, in the above operation, it is assumed that the initiator detects some operation error when sending a command in the command phase, for example. In this case, the initiator, as shown in FIG. 7, receives an attention condition (atte) after the command phase.
generation condition. In this case, the target interrupts the normal phase sequence described above and sends a message out phase (mass).
to the age phase). In this message out phase, the initiator notifies the target that an error has occurred. In this case, the target is
Next, the message in phase is executed to request the initiator to resend the command. The initiator is
Here, the command phase is entered again and the command is retransmitted. At this time, assuming that the operation error has disappeared in the initiator, thereafter, a predetermined phase operation is executed as in the case of FIG.

Thus, the SCSI information transfer operation is
A large number of phases make transitions in a fixed order, and the type and transition order of each phase are different between normal times and abnormal times.

Therefore, when the function and quality of the SCSI device is tested and evaluated by the test device, it is necessary to execute various test operations by assuming various operating conditions in both normal and abnormal states. ..

[0009]

Conventionally, when such a test operation is executed, a corresponding phase operation is set in the test apparatus one by one for each assumed operating condition, and each test operation is performed. Confirm the operation by executing the phase operation, or set a series of phase transitions in the test device in advance,
I was checking to see if the operation that was set was executed.

The method of setting the phase operations one by one in the test apparatus as described above requires a lot of labor for the test work. Also, the method of setting a series of phase transitions in the test equipment is
If the phase operations are not executed in the set order, the cause cannot be easily determined. Therefore, SC
They read the internal information of the SI device and checked it, or changed the setting and tried to execute another phase operation.

As described above, conventionally, there has been a problem that the test work of the SCSI device is troublesome and cannot be efficiently executed.

The present invention solves the above problems and enables SCS to carry out test work efficiently without much effort.
An object is to provide an I-phase transition test device.

[0013]

To this end, according to the present invention, the correct phase transition and command information corresponding to the operation to be executed are registered in advance, and various kinds of target devices are registered in the target device according to the registered phase transition and command information. While executing the operation, if the actual phase transition during the target device operation is different from the correct phase transition, execute various operations according to the actual phase transition, and after the various operations are completed, execute the correct phase transition. The difference from the phase transition of is displayed.

[0014]

The plurality of phases registered in advance can be automatically executed, and even if the phases do not transit in the registered order, the phases that can be executed are automatically executed in sequence according to the state. It is possible to reduce the setting work to
The device status of the CSI device can be easily determined.
As a result, the test work can be efficiently performed without any trouble.

[0015]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a SCSI according to an embodiment of the present invention.
It is a diagram showing a configuration diagram of a phase transition test apparatus. In the figure, an external storage device 2, a screen display device 3 and an input device 4 are connected to the processing device 1. An interface unit 1a is arranged in the processing device 1, and a SCSI device 5 is connected to the interface unit 1a.

The processing device 1 is a microcomputer system and executes a test program for testing the SCSI device 5. The SCSI device 5 is a device to be tested and is a SCSI peripheral device. The interface unit 1 a is for connecting the SCSI device 5 to the processing device 1. The external storage device 2 stores data files such as a test program and a phase entry file. The phase entry file is
The parameter information for testing the SCSI device 5 is stored. The parameter information indicates each phase and command of SCSI and the execution result of each phase operation. The screen display device 3 displays the execution result of the test operation on the screen. The input device 4 is
It is a keyboard for inputting various information.

As shown in FIG. 2, the test program comprises a parameter input section 11, an interpreter 12, a phase execution section 13, and an execution result output section 14. The parameter input unit 11 reads various parameter information from the phase entry file. The interpreter 12 determines the operation to be executed based on the parameter information. The phase execution unit 13 controls the SCSI device 5 to execute various phase operations. The execution result output unit 14 displays, on the screen display device 3 as an execution result, a point that the executed phase transition is different from the transition instructed in the phase entry file, or saves it as a data file.

When the test operation is executed by the SCSI phase transition test apparatus of the present embodiment having the above-mentioned configuration, the operator first creates a phase entry file. In this case, various parameters corresponding to the operation to be executed by the SCSI device 5 are input from the input device 4 and stored in the external storage device 2 as a phase entry file.

FIG. 3 shows an example of the information content of the phase entry file. In the figure, test items # 1 to # 5 are various test operations to be executed by the SCSI device 5, and S for executing one type of command respectively.
The phase transition of CSI is shown. Each test item # 1
In # 5, the number at the head is the serial number of the test item, and the character information delimited by "->" is the parameter of the phase operation. Among the parameters, English words indicate phases, and numbers in parentheses indicate code information to be transferred. Further, "WITH PARITY" intentionally causes a parity error at each data transfer. The number "0x" in parentheses indicates hexadecimal notation.

Here, the operations assumed in each of the test items # 1 to # 5 will be described. In this embodiment, the processing device 1
Is the initiator, and the SCSI device 5 is the target. Further, each operation starts in the bus free phase, which is the unused state of the SCSI bus.

In test item # 1, the initiator executes the arbitration phase in the bus free phase and acquires the right to use the bus. Then, the selection phase is executed to select the target.

Next, the command phase is executed to send the command to the target. .. In this example, a request sense (request) composed of 6-byte data is used.
est sense) command is transmitted. Also, in this test item, the initiator is set to detect a hardware abnormality when this command is sent. After this command phase, the target will take the initiative in phase transition.

When the initiator detects a hard abnormality as described above, it then generates an attention condition to notify the target of the abnormality occurrence. When the target detects an attention condition, it transitions to message out, and the initiator notifies the target that an abnormality has occurred. The code “0x05” of the same phase is the initiator detected error (in
It is the message code of the initiator detected error).

Next, the target is the message in
Execute phase to request resend of command. The code “0x03” in the same phase is the restore pointers that request retransmission.
It is the message code of s).

Thereafter, the command phase is executed again, and the initiator sends the same command to the target. This command is sent so that it can be executed without error. As a result, next, the data in phase is entered. Here, the target sends predetermined sense data to the initiator.

Next, the status phase is executed, and the target notifies the initiator of the execution result of the above command. The code “0x00” in the same phase is a command complete (command complete) message code indicating that the command execution is completed. After this, the message in phase is executed. Here, the target notifies the initiator of the execution result in the sequence of each phase. Then, it returns to the bus free phase.

In the test item # 2, the request sense command is transmitted as in the above. After this, the data
In-phase is executed, and the initiator inputs the sense data from the target. In this test item, the above phase operations are normally executed, then the status phase and the message in phase are executed, and the target notifies the initiator of the normal end.

This test item is set so that a parity error occurs when data is transferred in the message in phase. The initiator detects a parity error and generates an attention condition in the message in phase. This allows
Next, the message out phase is executed, and the initiator notifies the target that an abnormality has occurred. The code “0x09” in the same phase is a message code of a message parity error (massage parity error). Then message in
By executing the phase, the target notifies the initiator of the completion of the command. Then, it returns to the bus free phase.

In test item # 3, the initiator causes a parity error when sending a command in the first command phase. The send command at this time is a rezero unit (rezero).
unit). In this case, the target detects a parity error and then performs a message in to request the target to resend. Then again command
By executing the phase, the initiator retransmits the same command. At this time, the parity error is set not to occur. As a result, after this, the status
Phase and message in phase are executed,
Restore the bus-free phase.

In test item # 4, while the initiator sends a parity error command in the same manner as described above,
After receiving the resend request in the message-in phase, the parity error command is resent again. SCSI
Then, if two parity errors occur consecutively,
It is specified to stop the phase operation. Therefore, when the target detects the parity error of the second command, it stops the operation and returns to the bus free phase.

The test item # 5 is similar to the test item # 1 in that after the command is sent, the initiator generates a reset condition and forcibly returns to the bus free phase.

When executing the test operation of the SCSI device 5, the operator activates the test program by a predetermined operation and designates a desired phase entry file. As a result, the test program starts the test operation of the SCSI device 5 according to the instructed phase entry file.

FIG. 4 shows the test operation. That is, when the test program is activated, first, the parameter information for one test item is read from the phase entry file (process 101). Then, each parameter information is translated, and the phase operation to be sequentially executed is determined (process 102).

Next, one phase operation is started according to the description order of the phase entry file (process 103). Then, it is monitored whether or not the started phase operation is completed within a preset time limit (process 104, process 105 to process 105 from N of process 104).
From N to process 104).

When the phase operation is completed within the time limit (Y in process 104), it is determined whether the execution of all phases of one test item is completed (process 1).
06). If it is not completed yet (process 106)
N), it is determined whether each phase operation is transited as described in the phase entry file (Process 10).
7).

When the target correctly executes the predetermined operation, the phase operation transits as described in the phase entry file. In that case (Y of processing 107), the next phase operation is executed (to 103).

By the way, for example, in the test item # 3 shown in FIG. 3, the initiator sends a parity error command in the command phase and receives a retransmission request from the target in the next message in phase. Is assumed. If during this operation the target does not detect a parity error in the command, then the target will perform other phases, such as the status phase.

When no phase transition occurs in the description order of the phase entry file (N in step 107), the initiator executes an executable phase operation according to the actual phase transition (to step 108). For example, as described above, when the command phase is followed by the status phase, the initiator
Receive status information from the target.

In this way, when the operation of each phase of one test item is completed (Y in process 106), the target device state notified in the status phase is checked (process 109). Here, when the abnormal state of the target has been notified (Y in processing 109), the initiator uses the request sense (requests).
output) command to read the target device status (process 110). When the abnormal state of the target has not been notified (N in process 109), the information reading is not executed.

Then, the execution result of the executed test operation is displayed on the screen display device 3. In this case, whether or not the phase transition has occurred as described in the phase entry file, and if different, the actual phase transition is displayed.
When the device status of the target is read, the device status is displayed (process 111).

After this, it is judged whether or not the operations of all the test items in the phase entry file have been completed (Process 1
12) If not completed yet (N in process 112),
The same operation is repeated (to process 101).

On the other hand, if one phase operation is not completed within the preset time limit (Y in step 105) during execution of the above operation, the initiator generates a reset condition and resets the SCSI bus. (Process 113). As a result, the target is forcibly returned to the initial state.

In this way, when the operation of all the test items is completed (Y in process 112), the execution result is stored in the external storage device 2 as a data file (process 11).
4). The stored information in this case is the same information as the execution result displayed on the screen display device 3.

FIG. 5 is an output example of the execution result of each test item # 1 to # 5 of the phase entry file shown in FIG.

In the figure, test items # 1, # 2, # 5
Indicates that the phase has been correctly changed as described in the phase entry file.

In the test items # 3 and # 4, "expe"
"ct" indicates the phase transition registered in the phase entry file, that is, the expected state, and "ac"
“Tual” indicates an actual phase transition.

In the case of test item # 3, although the initiator has sent the parity error command, the phase transitions during normal operation such as the status phase and the message in phase are performed thereafter. In addition, in those phases, the target notifies the normal end (code “0x00”). this is,
It is considered that the target could not detect the parity error.

In the case of test item # 4, the initiator is 2
After sending the parity error command for the second time, the status phase is executed, and the target notifies the abnormal end (code “0x02”). Then, the message-in phase is being executed.

In the SCSI, it is specified that when a parity error is detected twice in succession, the phase operation is immediately stopped and the bus free phase is restored. In this case, the above function of the target is considered to be an obstacle.

Further, in this example, since the target has detected the abnormality and ended the operation, the initiator outputs the request sense command to read the sense data indicating the details of the abnormality. In the figure, "key = 0"
Bh ”and“ sense code = 47h ”indicate the information code of the read sense data.

As described above, in this embodiment, the correct phase transition and command information corresponding to each operation of the test item are registered in advance as the phase entry file,
The target device is caused to execute various operations in accordance with the registered phase transition and command information. Further, when the actual phase transition is different from the correct phase transition, various operations are executed according to the actual phase transition.

As described above, by registering only the expected correct phase transition, an unexpected phase transition operation is automatically executed, so that the operator's labor for setting work is reduced. Moreover, since a plurality of test items are sequentially executed, the test work can be efficiently executed.

After the test operation, the difference between the correct phase transition and the actual phase transition is displayed, and if the target device detects an error at the end of the operation, the request sense command is automatically sent. The data is sent out, the device status is read, and the result is output. As a result, the device state of the target device can be easily determined, and the abnormal part can be easily searched.

Further, since the phase entry file is a data file of character information, the operator can easily create it by the input operation from the input device 4. Further, since the contents of the file can be confirmed by displaying it on the screen, the contents can be easily changed.

Further, if the operation of each phase is not completed within the time limit, the bus is forcibly reset, so that the target device is prevented from hanging up.

Furthermore, since the execution result of each operation is displayed on the screen and saved as a data file, past execution results can be read and referenced.

Although the execution result of each operation is displayed on the screen in the above embodiment, a printer is provided,
You may make it record on paper.

Further, although the phase entry file is registered with character information such as English words, it may be registered with an abbreviation or symbol defined arbitrarily.

Although the phase transition is mainly checked, it goes without saying that the code information transferred in the status phase or the data-in phase can also be checked in the same manner.

[0061]

As described above, according to the present invention, the correct phase transition and command information are registered in advance, and the target device is caused to execute various operations according to the registered contents, while the actual phase transition is If it is different from the correct phase transition, the operation according to the actual phase transition is executed, so the setting work for the test equipment can be reduced and the target equipment state can be easily understood from the execution result. Therefore, it is possible to efficiently carry out the test work without any trouble.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a SCSI phase transition test apparatus according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a test program.

FIG. 3 is an explanatory diagram showing an example of information of a phase entry file.

FIG. 4 is an operation flowchart of a test program.

FIG. 5 is an explanatory diagram showing an example of output information of a test operation execution result.

FIG. 6 is an explanatory diagram showing an example of phase transition.

FIG. 7 is an explanatory diagram showing an example of a phase transition when an error occurs.

[Explanation of symbols]

 1 Processing Device 1a Interface Unit 2 External Storage Device 3 Screen Display Device 4 Input Device 5 SCSI Device 11 Parameter Input Unit 12 Interpreter 13 Phase Execution Unit 14 Execution Result Output Unit

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 7, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief explanation of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a configuration diagram of a SCSI phase transition test apparatus according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a test program.

FIG. 3 is an explanatory diagram showing an example of information of a phase entry file.

FIG. 4 is an operation flowchart of a test program.

FIG. 5 is an explanatory diagram showing an example of output information of a test operation execution result.

FIG. 6 is an explanatory diagram showing an example of phase transition.

FIG. 7 is an explanatory diagram showing an example of a phase transition when an error occurs.

[Explanation of reference numerals] 1 processing device 1a interface unit 2 external storage device 3 screen display device 4 input device 5 SCSI device 11 parameter input unit 12 interpreter 13 phase execution unit 14 execution result output unit

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 6]

[Figure 3]

[Figure 7]

[Figure 4]

[Figure 5]

Claims (6)

[Claims] 1. A target device to be tested is connected in a SCSI interphase, various commands are sent to the target device in a fixed procedure to execute various operations, and transition of each phase and execution result at the time of executing the operation are In a SCSI phase transition test device for testing whether or not it is correct, a test operation registration means for registering a correct phase transition and command information according to an operation to be executed in advance, and the above-mentioned operation according to the registered phase transition and command information. Target device control means for causing the target device to execute various operations, and unregistered operation for executing various operations according to the actual phase transition when the actual phase transition during operation of the target device is different from the registered correct phase transition Execution means and the correct phase transition after various operations are completed And a result output means for displaying a difference between an actual phase transition and a SCSI phase transition testing device. 2. The test operation registration means is means for inputting the correct phase transition and command information as character information from a keyboard and registering as a data file of character information. SCSI
Phase transition test equipment. 3. The test operation registration means is means for registering a plurality of types of the correct phase transition and command information, and the target device control means executes an operation corresponding to the plurality of types to the target device. The SCSI phase transition test apparatus according to claim 1, characterized in that it is means for causing a change. 4. A reset means for resetting a target device to an initial state when a required time for transition of each of the phases exceeds a preset time limit. Item 1. The SCSI phase transition test device according to Item 1. 5. When the target device detects an operation error at the end of the various operations, a means for reading detailed information of the error from the target device and a means for displaying the read detailed information are provided. The SCSI phase transition test apparatus according to claim 1, further comprising: 6. The execution result output means is means for displaying a difference between the correct phase transition and an actual phase transition on a screen and storing the difference as a data file. SCSI phase transition test equipment.