JPH0764869A - Method for controlling error ceneration for test in storage device and device therefor - Google Patents

Abstract

PURPOSE:To make it possible to generate a fixed fault and an intermittent fault in an arbitrary address in a storage device without stopping a device which performs and access to the storage device. CONSTITUTION:This device is equipped with an error condition address setting part 1 which stores error generating condition and error generating address designated from the outside, an address data setting part 2 which stores writing address and writing data designated by the other device, an address comparing part 3 which compares the error generating address with the writing address and generates a matching signal, an error condition control part 4 which controls the error generating condition according to an error generating situation, and a data inverting part 6 which inverts the bits of the writing data according to the error generating condition when the address are matched, and stores the data in a data storage part 5. Error data are written in the data storage part 5 according to an instruction from the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage device test error generation control device, and more particularly to a storage device test error generation which causes an error similar to a fixed failure or an intermittent failure to an arbitrary address of the storage device. Regarding the control device.

[0002]

2. Description of the Related Art In recent years, storage devices are often connected to a plurality of devices and accessed by the plurality of devices as commonly used devices. In addition, the storage device is often duplicated in order to leave the database information and the transaction log and improve the reliability.

Therefore, various mechanisms and functions are added to the hardware and software for switching the storage device when a failure occurs in the duplicated storage device. Especially for 1 or 2 bit error in RAM which is a memory device, hardware sends error address, duplication information and machine check code, software validates the address based on the report from hardware and Some have read access to determine whether a fixed failure or an intermittent failure. Here, if the fault is a fixed fault, the main storage unit is disconnected, and if it is an intermittent fault, the main storage unit is disconnected, the slave unit becomes the main system, and then the storage unit that was disconnected again is connected. It is supposed to perform complicated work such as separating the included pages.

Further, each address of the storage device has a control table managed by the OS and an area accessed by the user, and the control may change depending on each address of the storage device. Therefore, in order to test whether these functions operate normally, fixed failure at any address of the storage device,
Alternatively, it is necessary to generate an intermittent failure and check the software and hardware that perform these controls.

[0005]

Up to now, in order to confirm these functions described above, it has been supposed that a trouble is caused by scan-in or tie-up from the back panel. With such means, it may cause a failure at any address in the RAM in the storage device,
It is difficult to generate an arbitrary number of failures.

Further, even if the devices are stopped and the write data register is rewritten at the write timing with a single clock, the system confirms that the devices are alive to each other, and other devices are stopped in order to cause a failure. There is a "hot standby function" that disconnects the system configuration from the device within a few seconds, and this method cannot test a system having a redundant storage device.

Even if it is possible to stop all the devices, the access source and the storage device may not be clock-synchronized with each other, and access using a single clock is becoming impossible. Also, as a method of generating an error at a specific address in the storage device, the device is stopped at the time of intermittent failure, the memory access is executed by a single clock, and the contents of the write data register are inverted by scan-in at the timing of writing to RAM. Was there.
However, with this method, the failure can occur only once.

As described above, it has become difficult to generate a 1-bit or 2-bit error at an arbitrary address or a fixed address and debug the RAS function of software or hardware. Therefore, in order to speed up the system development work, it is required to generate a 1-bit or 2-bit error in the RAM of the storage device at an arbitrary address without stopping the device.

The present invention was created in view of the above point, and a fixed failure or an intermittent failure occurs at an arbitrary address in the storage device without stopping the device accessing the storage device. An object of the present invention is to provide a test error occurrence control device for a storage device.

[0010]

As shown in FIG. 1, a first means for solving the above-mentioned problems is to use a test error occurrence control method for a storage device by externally applying error occurrence conditions and error occurrence addresses. (ST1), a write address and write data are specified from another device (ST2), the error occurrence address is compared with the write address (ST3), and when the addresses match, the write data is written according to the error occurrence condition. The bit is inverted and stored in the data storage unit (5) (ST4), and the error data is written in the data storage unit (5) according to the designation from the outside.

The second means of the present invention, as shown in FIG. 2, specifies a test error occurrence control method for a storage device by externally designating an error occurrence condition and an error occurrence address (S).
T11), and specify a read address from another device (ST
12) The error occurrence address and the read address are compared (ST13), and when the addresses match, the bit of the data read from the data storage section (15) is inverted and output (ST1).
4), the data storage unit (15) according to the designation from the outside
It is assumed that a read error will occur.

A third means for solving the above problems in the present invention is, as shown in FIG. 1, a test error occurrence control device for a storage device, which is provided with an error occurrence condition and an error occurrence address specified externally. An error condition address setting unit 1 for storing, an address data setting unit 2 for storing a write address and write data designated by another device, and an address comparison for generating a coincidence signal by comparing the error occurrence address and the write address. A unit 3, an error condition control unit 4 for controlling an error occurrence condition according to the error occurrence situation, and a data inverting unit 6 for inverting a bit of write data according to the error occurrence condition and storing it in the data storage unit 5 when addresses match. Therefore, the error data is written in the data storage unit 5 according to the designation from the outside.

Further, in the present invention, a fourth means for solving the above-mentioned problems is, as shown in FIG. 2, an error occurrence condition and an error occurrence condition in which a test error occurrence device of a storage device is designated from the outside. An error condition address setting unit 11 that stores an address, an address setting unit 12 that stores a read address designated by another device, and an address comparison unit 13 that compares the error occurrence address with the read address and generates a match signal. And an error condition control unit 14 for controlling an error condition according to the error occurrence condition and a data inverting unit 16 for inverting and outputting the bit of the data read from the data storage unit 15 according to the error occurrence condition when the address matches. A read error is generated in the data storage unit 15 according to designation from the outside.

[0014]

According to the first and third means of the present invention, the outside specifies the error occurrence condition and the error occurrence address and stores them in the error condition address setting unit 1. The other device specifies the write address and the write data and stores it in the address data setting unit 2. The address comparison unit 3 compares the error occurrence address with the write address and generates a coincidence signal, the error condition control unit 4 controls the error occurrence condition according to the error occurrence condition, and the data inversion unit 6 determines the address. When they match, the bit of the write data is inverted according to the error occurrence condition and stored in the data storage unit 5.

Therefore, it is possible to write an inverted error signal to an arbitrary address of the storage device under a specified condition, and by reading the error data, it is possible to test the system when an error occurs. According to the second and fourth means of the present invention, the outside specifies the error occurrence condition and the error occurrence address, and stores them in the error condition address setting unit 11. The other device specifies the write address and the write data, and stores it in the address data setting unit 12. The address comparison unit 13 compares the error occurrence address with the write address and generates a coincidence signal, and the error condition control unit 14 controls the error occurrence condition according to the error occurrence situation, while the data inversion unit 6 determines the address. When they match, the bit of the data read from the data storage unit 5 is inverted and output according to the error occurrence condition.

Therefore, from an arbitrary address of the storage device,
The inverted error signal can be read out under the specified conditions, and the system can be tested when an error occurs.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a test error occurrence control device for a storage device according to the present invention will be described below with reference to the drawings. Figure 3
Shows a first embodiment of a test error occurrence control device for a storage device according to the present invention. The present embodiment corresponds to the above-mentioned first and third means. That is, the test error occurrence control device for a storage device according to the present embodiment intermittently or fixedly fixes error data in which 1 or 2 bits of data are inverted at an address designated when writing data to an array which is a data storage unit. To write to.

In this embodiment, the test error occurrence control device for the storage device is an error condition address setting unit for storing the error occurrence condition and the error occurrence address specified by the service processor (SVP) from the outside of the device. A control register 21, a write data register 22 as an address data setting unit that stores a write address and write data designated by another device, an address register 23, and a write enable signal (WE) register 24.
And an address comparison circuit 25 as an address comparison unit that compares the error occurrence address with the write address and generates a match signal, and an error occurrence as an error condition control unit that controls the error occurrence condition according to the error occurrence situation. A frequency comparison circuit 26 and an error selection circuit 27,
It has a write data inversion circuit 28 as a data inversion unit which inverts the bit of the write data according to the error occurrence condition and stores it in the array 29 when the addresses match.

In this embodiment, the error control register 21
Is an address register (CR) 41 which is designated by the SVP or the like as to which address is to be in error, and 1 or 2
An error bit designating bit (2B) 42 that indicates any bit error, a fixed fault valid bit (PV) 43 that indicates whether the fault is an intermittent fault or a fixed fault, an intermittent fault valid bit (TV) 44, and Intermittent failure occurrence frequency instruction register (TC) 4 that specifies whether to generate a failure
5 and 5.

As a result, designation of an address at which an error is generated, designation of a 1-bit or 2-bit error as a fault condition, designation of an intermittent fault or a fixed fault, and how many times the fault is generated in the case of an intermittent fault are designated. It is supposed to do.
Further, the write data register 22 stores data to be written specified by another device from bit 0, bit 1, bit 2 to bit n, and further the address register 2
An address where the data is stored is stored in 3.

The address comparison circuit 25 compares the address stored in the address register 41 of the error control register 21 with the address designated by the other device and stored in the address register 23, and turns on a match signal when they match. . Further, the error selection circuit 27 has two AND gates 30 and 31, a value of the error bit instruction register 42, a match signal of the address comparison / comparison circuit 25, and
Upon receiving a write enable signal (WE) from another device, it outputs a 1 or 2 bit bit inversion signal to the write data inversion circuit 28.

The write data inversion circuit 28 receives the bit inversion signal from the error selection circuit 27 and inverts the values of bit 0 and bit 1 of the data stored in the write data register 22 in an exclusive logic loop (EOR). Gate 3
2 and 33, and inverts the designated bit 0 or bit 1 data and outputs it. Bit 2 to bit n
The data up to is output to the array as it is.

In the present embodiment, the error occurrence count comparison circuit 26 has a value of the failure occurrence count instruction register 45 of the error control register 21 and a failure occurrence count register (FC) 46 for counting the actual failure occurrence count. When the intermittent fault occurrence is designated, that is, when the indirect fault valid bit 45 is set and the number of fault occurrences reaches the designated number, the intermittent fault valid register 45 is reset and an error occurs. Stop the occurrence of.

When the fixed fault valid bit 43 is set, data inversion is fixed and counting is not performed. Reference numeral 34 is an OR gate that activates the error selection circuit 27 when either the fixed fault valid bit 43 or the intermittent fault valid bit 44 is ON. Therefore, according to this embodiment, the intermittent failure valid bit 4
When 4 is on, if there is write permission based on access information from another device, the address comparison circuit 25 compares the address register 41 previously set by SVP or the like with the address register 23 of the other device, When they match, a match signal is generated.

The write data inversion circuit 28 inverts the 1 or 2 bit write data designated by the error selection circuit 27. Then, the intermittent failure occurrence count register 46
1 is added (+1) to the error occurrence frequency comparison circuit 2
6 compares this value with the previously set intermittent failure occurrence frequency instruction register 45, and if they match, resets the intermittent failure valid bit 44 as having generated a predetermined number of errors, and the series of processing ends.

Further, when the fixed fault valid bit 43 of the error control register is set, and when the access from the other device is a write, the address comparison circuit 25 can match the address from the other device, Device is 1 or 2
Continues to invert the bit write data regardless of the number of failures. Therefore, according to the present embodiment, the designated 1 or 2 bit inverted error signal can be written as the designated intermittent fault or fixed fault in any address of the storage device, and the system is tested when the error occurs. be able to.

Next, a second embodiment of the test error occurrence control device for a storage device according to the present invention will be described. FIG. 4 shows a second embodiment of the test error occurrence control device for the storage device according to the present embodiment. The present embodiment corresponds to the above-mentioned second and fourth means. In the present embodiment, the test error occurrence control device for a storage device according to the present embodiment intermittently outputs error data obtained by inverting 1 or 2 bits of data from an address designated when reading data from an array which is a data storage unit. It is a fixed read.

In this embodiment, the test error occurrence control device of the storage device is designated by the service processor as an error control register 51 as an error condition address setting section for storing the error occurrence condition and error occurrence address specified by the service processor. An address register 53 and a read enable signal (RE) register 54 as an address setting unit for storing a write address and write data, and an address comparing unit for generating a coincidence signal by comparing the error occurrence address with the write address. Address comparison circuit 55
And an error occurrence count comparison circuit 56 and an error selection circuit 57 as an error condition control unit that controls the error occurrence condition according to the error occurrence condition, and inverts the data read from the array 59 when the addresses match in accordance with the error occurrence condition. , And a read data inversion circuit 58 as a data inversion unit for storing in the read data register 52.

In this embodiment, the error control register 51
Is an address register (CR) 71 which is designated by the SVP or the like as to which address is an error, and 1 or 2
An error bit designating bit (2B) 72 that indicates either a bit error, a fixed fault valid bit (PV) 73, an intermittent fault valid bit (TV) 74 that indicates whether the fault is an intermittent fault or a fixed fault. Intermittent fault occurrence frequency instruction register (TC) 7 that specifies whether to generate a round fault
5 and 5.

As a result, designation of an address at which an error occurs, designation of a 1-bit or 2-bit error as a fault condition, designation of an intermittent fault or a fixed fault, and how many times the fault will occur if it is an intermittent fault is designated. It is supposed to do.
Further, the address register 53 stores an address for reading the data.

The address comparison circuit 55 compares the address stored in the address register 71 of the error control register 51 with the address designated by the other device and stored in the address register 53, and turns on a match signal when they match. . The error selection circuit 57 has two AND gates 60 and 61, and receives the value of the error bit instruction register 72, the match signal of the address comparison circuit 55, and the read permission signal (RE) from another device. It outputs a bit inversion signal of 1 or 2 bits to the read data inversion circuit 58.

The read data inversion circuit 58 receives the bit inversion signal from the error selection circuit 57 and inverts the values of bit 0 and bit 1 of the data read from the array 59, and an exclusive logic loop (EOR) gate. 62 and 63, and inverts the designated bit 0 or bit 1 data and outputs it to bit 0 and bit 1 of the read register 52. The data from bit 2 to bit n of the read data register is stored as it is from the array 59.

In the present embodiment, the error occurrence count comparison circuit 56 includes the value of the failure occurrence count instruction register 75 of the error control register 51 and the failure occurrence count register (FC) 76 for counting the actual failure occurrence count. When the occurrence of the intermittent failure is designated, that is, when the indirect failure valid bit 75 is set and the number of failure occurrences reaches the designated number of times, the intermittent failure valid register 75 is reset, Stop the error from occurring.

When the fixed fault valid bit 73 is set, data inversion is fixed and counting is not performed. Further, reference numeral 64 is an OR gate similar to that of the first embodiment. Therefore, according to the present embodiment, when the intermittent failure valid bit 74 is on, if there is read permission based on access information from another device, the address comparison circuit 5
5 is the address register 71 previously set by SVP or the like.
Is compared with the address register 53 of another device, and when they match, a match signal is generated.

The read data inversion circuit 58 inverts the 1 or 2 bit read data designated by the error selection circuit 57. Then, the intermittent failure occurrence count register 76
1 is added (+1) to the error occurrence number comparison circuit 5
6 compares this value with the previously set intermittent failure occurrence number instruction register 75, and if they match, it resets the intermittent failure valid bit 74 by assuming that a predetermined number of errors have occurred, and the series of processing ends.

Further, when the fixed fault valid bit 73 of the error control register is set, when the access from the other device is a read, the address comparison circuit 55 can match the address from the other device, Device is 1 or 2
Bit read data is continuously inverted regardless of the number of failures. Therefore, according to the present embodiment, the designated 1 or 2 bit inverted error signal can be read from the arbitrary address of the storage device as the designated intermittent fault or fixed fault, and the system is tested when the error occurs. be able to.

[0037]

As described above, according to the present invention, error data is generated at an arbitrary address under a predetermined condition, so that any device in the memory device can be accessed without stopping the device accessing the memory device. There is an effect that a fixed fault or an intermittent fault can be generated in the address of, and the hardware and software storage devices can be easily debugged.

[Brief description of drawings]

FIG. 1 is a diagram showing a principle of first and third means according to the present invention.

FIG. 2 is a diagram showing the principle of second and fourth means according to the present invention.

FIG. 3 is a diagram illustrating a configuration of a first embodiment of a test error occurrence control device for a storage device of the present invention.

FIG. 4 is a diagram for explaining a configuration of a second embodiment of a test error occurrence control device for a storage device of the present invention.

[Explanation of symbols]

 1 error condition address setting unit 2 address data setting unit 3 address comparison unit 4 error condition control unit 5 data storage unit 6 error condition control unit 11 error condition address setting unit 12 address setting unit 13 address comparison unit 14 error condition control unit 15 data Storage unit 16 Error condition control unit

Claims (4)

[Claims] 1. An error occurrence condition and an error occurrence address are designated from the outside (ST1), a write address and write data are designated from another device (ST2), and the error occurrence address and the write address are compared ( ST3), when the addresses match, the bit of the write data is inverted according to the error occurrence condition and stored in the data storage unit (5) (ST4), and the error data is stored in the data storage unit (5) according to the designation from the outside. An error occurrence control method for testing a writing storage device. 2. An error occurrence condition and an error occurrence address are specified from the outside (ST11), a read address is specified from another device (ST12), and the error occurrence address and the read address are compared (ST13). When the addresses match, the bit of the data read from the data storage section (15) is inverted and output according to the error occurrence condition (ST14), and according to the designation from the outside,
A test error occurrence control method for a storage device that causes a read error in a data storage section (15). 3. An error condition address setting unit (1) for storing an error occurrence condition and an error occurrence address specified from the outside, and an address data setting unit (2) for storing a write address and write data specified by another device. The addresses match the address comparison unit (3) that compares the error occurrence address with the write address and generates a match signal, and the error condition control unit (4) that controls the error occurrence condition according to the error occurrence situation. And a data inversion unit (6) that inverts the bit of the write data according to the error occurrence condition and stores it in the data storage unit (5), and writes the error data in the data storage unit (5) according to the designation from the outside. Storage device test error control device. 4. An error condition address setting section (11) for storing an error occurrence condition and an error occurrence address specified from the outside, an address setting section (12) for storing a read address specified by another device, and the error occurrence An address comparison unit (13) that compares an address with the read address and generates a coincidence signal, and an error condition control unit (14) that controls an error condition according to the error occurrence situation, and data according to the error occurrence condition when the address matches. A data inversion unit (1 that inverts and outputs the bits of the data read from the storage unit (15)
6) and a test error generation control device for a storage device, which has a read error in the data storage section (15) according to an external specification.