CN111986707B - Disk link exception handling test method and device - Google Patents
Disk link exception handling test method and device Download PDFInfo
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- CN111986707B CN111986707B CN202010851464.9A CN202010851464A CN111986707B CN 111986707 B CN111986707 B CN 111986707B CN 202010851464 A CN202010851464 A CN 202010851464A CN 111986707 B CN111986707 B CN 111986707B
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- 238000010998 test method Methods 0.000 title claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 158
- 238000002347 injection Methods 0.000 claims abstract description 64
- 239000007924 injection Substances 0.000 claims abstract description 64
- 238000000034 method Methods 0.000 claims abstract description 52
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
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- 238000013500 data storage Methods 0.000 description 1
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1816—Testing
Abstract
The invention discloses a disk link error injection method, an exception handling test method and a device, wherein a disk to be tested and a test end are both connected to an SCSI bus; the test end sends a command for reading information of the disk to be tested to the disk to be tested through the SCSI bus; the test end receives the relevant information which is returned by the disk to be tested and is read according to the disk information reading command through the SCSI bus; the test end judges whether the parameter actual value of the returned relevant information is different from a preset parameter theoretical value; if the difference is not the same, the error injection of the disk link is successful; the preset parameter theoretical value is different from the actual value of the returned related information parameter under the normal transmission condition. The invention can not affect the disk data, and avoid the risk of data loss; the returned data is different from the preset parameter theoretical value, so that the error recovery steps are reduced, and the error injection method is simplified; the execution difficulty of testers is simplified, and the test efficiency of an abnormal processing flow is improved.
Description
Technical Field
The invention relates to the field of disk link testing, in particular to a disk link error injection method, an exception handling testing method and an exception handling testing device.
Background
The storage device is used for professional data storage, and storage manufacturers pay attention to data safety under normal conditions and gradually improve data processing flows under various abnormal conditions. The disk link comprises data transmission among the disks, disk slots and controllers, the probability of errors occurring in the link is inevitable along with the increase of data volume and the lengthening of service time, taking a double-control device as an example, when the error count on the controller A link exceeds a set maximum value (threshold), the controller A link is judged to be in failure, at the moment, a user is advised to replace the controller, and the other controller takes over the normal operation of the service; because the disk slot is connected with the two controllers at the same time, when the error count of the two links of a certain disk slot occurs, the user is advised to replace the disk slot, and the equipment operates normally. The disk, the disk slot and the controller all belong to storage components, error simulation cannot be performed through tools such as an external analyzer, errors are directly made on a data bus through methods such as forced assignment and the like, after errors are made, if recovery is improper, a risk of data loss exists, and abnormal processing can be performed only when a link error exceeds a threshold value, so that forced assignment needs to be performed for many times, the recovery difficulty is increased, and the execution risk is high; the assignment field needs to be assigned according to each field in a specific protocol, the command execution difficulty is high, and the test efficiency is low.
Disclosure of Invention
In order to solve the problems, the invention provides a disk link error injection method, an exception handling test method and a device, the error injection process is simple to operate, and data safety is not influenced.
The technical scheme of the invention is as follows: a disk link error injection method comprises the following steps:
the magnetic disk to be tested and the test end are both connected to an SCSI bus; the test end sends a command for reading information of the disk to be tested to the disk to be tested through the SCSI bus; the test end receives the relevant information which is returned by the disk to be tested and is read according to the disk information reading command through the SCSI bus;
the test end judges whether the parameter actual value of the returned relevant information is different from a preset parameter theoretical value;
if the difference is not the same, the error injection of the disk link is successful; the preset parameter theoretical value is different from the actual value of the returned related information parameter under the normal transmission condition.
Further, the sent command for reading the information of the disk to be tested is a command for reading the relevant information of the mode page of the disk to be tested.
Further, presetting a parameter theoretical value as a length theoretical value of the read related information;
the test end judges whether the parameter actual value of the returned relevant information is different from a preset parameter theoretical value, and the method specifically comprises the following steps: and judging whether the length actual value of the returned related information is different from a preset length theoretical value or not.
Further, the preset parameter theoretical value is included in the command for reading the information of the disk to be tested.
Further, the command for reading the information of the disk to be tested further includes an SCSI extension address of the disk to be tested, a corresponding value of the information to be read in an SCSI protocol, an executed operation type, an SCSI address of the disk to be tested, and a type of the device to be tested.
The technical scheme of the invention also comprises a disk link exception handling test method, wherein a disk to be tested is respectively connected with a first test end and a second test end; the method comprises the following steps:
the first testing end executes the method of any one of the above steps for multiple times to inject the disk link error;
counting the successful times of the error injection and monitoring the counting value in real time, wherein 1 is added to the counting when the error injection is successful;
when the number of successful times of error injection exceeds a first preset number, detecting whether the first test terminal sends a link abnormity prompt, the first test terminal executes offline operation, and the second test terminal normally operates;
if not, the test is failed, and the test is stopped;
if yes, the test is passed, and the first test end and the second test end can normally process the link abnormity.
Further, after the first test end and the second test end pass the link exception handling test, the method further comprises the following steps:
the second testing end executes the method to inject the disk link error;
when the error injection is successful, detecting whether the second test end sends out a prompt that the disk slot is unavailable;
if the disk slot unavailability prompt is sent out, the test is passed, and the disk slot to be tested can normally process the link abnormity;
if the disk slot unavailability prompt is not sent, continuing to execute any one of the methods to perform disk link error injection;
if the second test end still does not detect whether the second test end sends the warning that the disk slot is unavailable after the error injection is successfully performed for the second preset times, the test is failed, and the test is stopped.
The technical scheme of the invention also comprises a disk link exception handling test device which is configured at a test end and comprises,
a command sending module: sending a command for reading information of the disk to be tested to the disk to be tested through an SCSI bus;
an information receiving module: receiving relevant information read from a disk to be tested returned by the SCSI bus;
a parameter judgment module: judging whether the parameter actual value of the returned related information is different from a preset parameter theoretical value or not, and if so, successfully injecting the disk link error; the preset parameter theoretical value is different from the actual value of the returned related information parameter under the normal transmission condition.
Further, the device also comprises a control device,
the error injection times counting module: the number of successful times of error injection is counted, and the count is increased by 1 every time the error injection is successful.
Further, the device also comprises a control device,
a first state detection module: detecting whether a test end where the device is located sends out a link abnormity prompt, whether the test end executes offline operation and whether a standby test end normally runs;
a second state detection module: and detecting whether the testing end of the device sends out the unavailable prompt of the disk slot.
According to the disk link error injection method, the exception handling test method and the device, disk information is read through the SCSI bus, disk data cannot be affected, and the risk of data loss is avoided; the parameter theoretical value is preset, and the returned data is different from the preset parameter theoretical value, so that the error recovery steps are reduced, and the error injection method is simplified; through the SCSI bus interface, the execution difficulty of testers is simplified by matching with data reading simulation error injection, and the test efficiency of an exception handling flow is improved.
Drawings
FIG. 1 is a schematic flow chart of a method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a second method of an embodiment of the present invention;
FIG. 3 is a schematic flow diagram of a three-way process according to an embodiment of the present invention;
fig. 4 is a block diagram illustrating a fourth structure according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of specific examples, which are illustrative of the present invention and are not limited to the following embodiments.
Hereinafter, english according to the present invention will be described.
SCSI: small Computer System Interface, Small Computer System Interface. SCSI is an interface to connect hosts and peripheral devices, supporting a variety of devices including disk drives, tape drives, optical drives, scanners. The data operation is carried out by a SCSI controller which is equivalent to a small CPU and has own command set and cache.
Example one
As shown in fig. 1, the present embodiment provides a method for simulating a disk link transmission error, including the following steps:
s101, connecting a disk to be tested and a test end to an SCSI bus;
s102, the test end sends a command for reading information of the disk to be tested to the disk to be tested through the SCSI bus;
s103, the test end receives relevant information which is returned by the disk to be tested and is read according to the disk information reading command through the SCSI bus;
s104, the test end judges whether the parameter actual value of the returned related information is different from a preset parameter theoretical value;
s105, if the difference is different, the error injection of the disk link is successful; the preset parameter theoretical value is different from the actual value of the returned related information parameter under the normal transmission condition.
In this embodiment, to simulate disk error injection, both the disk to be tested and the test end are connected to the SCSI bus, and both are in communication via the SCSI bus. It should be noted that the SCSI bus includes a SCSI controller, and the SCSI controller is responsible for processing data transmission between the disk to be tested and the test end.
In specific implementation, the test end reads information from the disk to be tested, firstly, the command for reading the information of the disk to be tested is input into the SCSI bus, and the command is processed by the SCSI controller. The corresponding disk to be tested is found after the command received by the SCSI controller, the disk to be tested is informed to read the relevant information, the information returned by the disk to be tested is received, and the information is returned to the testing end. And the test end judges the parameters of the returned related information, and if the parameters are different from the preset parameter theoretical value, the transmission error is judged, so that the simulation of the transmission error of the disk link is realized.
In this embodiment, the test end may specifically read information of a disk mode page from the disk, and simulate a disk link transmission error by determining whether the length of the read information of the mode page is the same as a preset length theoretical value.
In order to ensure that the simulation error injection is successful, the theoretical value of the preset parameter is different from the actual value of the parameter of the related information returned under the normal transmission condition. For example, in the present embodiment, a disk link transmission error is simulated by determining whether the length of the read mode page related information is the same as a preset length theoretical value, and the preset length preset value (i.e., the preset parameter preset value) is set to 8192, which is the longest length, and the length of the mode page related information generally does not reach 255, so that the length of the information returned from the disk is different from the preset length preset value, thereby effectively ensuring that an error with insufficient length is returned every time of reading, and an error of disk link transmission is successfully simulated. In another mode, a correct length value of the related information is obtained in advance, and a preset parameter preset value is set to be a value different from the correct length value of the related information.
In this embodiment, the preset parameter theoretical value may be included in a command for reading information of the disk to be tested, and in order to implement reading of data, the command for reading information of the disk to be tested further includes an SCSI extended address of the disk to be tested, a corresponding value of information to be read in an SCSI protocol, an executed operation type, an SCSI address of the disk to be tested, and a type of the device to be tested.
The specific command format is: pl _ scsi-l 0-c 0x1A,0,0x00,0x00,0xff, 0-d 255-w r-u 0-v d.
Wherein, -l represents the SCSI extended address of the disk to be tested, -c represents the corresponding value of the information to be read in the SCSI protocol, -d represents the theoretical value of the preset parameter, -w represents the type of operation performed (r represents a read operation), -u represents the SCSI address of the disk to be tested, -v represents the type of device to be tested (d represents a disk).
The SCSI address of the disk to be tested is used for positioning the SCSI bus to the disk to be tested, and the SCSI extended address of the disk to be tested is used for positioning the SCSI extended address of the disk to be tested to the address of the disk to be tested, which is needed to read information.
Example two
On the basis of the error injection in the embodiment, the embodiment provides a disk link exception handling test method to detect whether a test end can handle an exception normally when a link is abnormal.
The disk to be tested is generally a dual control system, that is, the master control and the disk to be tested normally communicate, and when the link between the master control and the disk to be tested is abnormal, the standby control is switched to ensure the normal operation of the service.
The magnetic disk to be tested in the embodiment is respectively connected with a first test end and a second test end; the first test end is used as a master control, and the second test end is used as a standby control.
As shown in fig. 2, the method comprises the steps of:
s201, the first testing end executes the method of the first embodiment for multiple times to inject the disk link error;
namely, error injection is performed at the first testing end by the method of the first embodiment.
S202, counting the successful times of error injection and monitoring the counting value in real time, wherein 1 is added to the counting every time the error injection is successful;
the first test end is provided with a first preset number of times, namely after the number of times of error injection exceeds the first preset number of times, the first test end is triggered to process the link abnormity.
S203, when the number of successful times of error injection exceeds a first preset number, detecting whether the first test terminal sends a link abnormity prompt, the first test terminal executes offline operation, and the second test terminal runs normally;
under normal conditions, when the link is abnormal, the first test end can send a link abnormity prompt, the first test end is offline, then the service is switched to the second test end, and the second test end can normally run and process the service.
S204, if not, the test is not passed, and the test is stopped;
if the first test end and the second test end do not process the exception according to the process, the test end cannot process the link exception normally, and the test fails.
S205, if yes, the test is passed, and the first test end and the second test end can normally process link abnormity;
similarly, if the first test end and the second test end process the exception according to the above process, it indicates that the test end cannot process the link exception normally, and the test passes.
EXAMPLE III
On the basis of the second embodiment, under the condition that the first test end and the second test end can normally process the link exception, whether the slot of the disk to be tested can normally process the link exception can be further tested.
As shown in fig. 3, the method for testing exception handling of a disk link provided in this embodiment includes the following steps:
s301, the second testing end executes the method of the first embodiment to inject the disk link error;
s302, when the error injection is successful, detecting whether the second test end sends out a disk slot unavailable prompt;
s303, if the disk slot unavailability prompt is sent out, the test is passed, and the disk slot to be tested can normally process the link abnormity;
s304, if the disk slot unavailability prompt is not sent, continuing to execute the method of the first embodiment to perform disk link error injection;
s305, if the second test end does not detect whether the second test end sends the unavailable disk slot prompt after the error injection is successfully performed for the second preset number of times, the test is failed, and the test is stopped.
The method includes that link fault injection is carried out at a second test end, at the moment, a first test end is offline, if a link still has a fault, under a normal condition, a disk slot to be tested is abnormal, and a prompt that the disk slot is unavailable is sent.
In order to ensure the test effect to be accurate, error injection is executed at least once, and error injection is executed for the second preset times at most, during the period, if the unavailable reminding of the disk slot can be detected, the link abnormity of the disk slot to be tested can be normally processed, and if the unavailable reminding of the disk slot cannot be detected until the second preset times, the link abnormity of the disk slot to be tested can not be normally processed. And if the second preset times exceed the link error threshold of the second testing end, the second testing end is off-line, and whether the disk slot can normally process the abnormity cannot be measured.
Example four
As shown in fig. 4, on the basis of the third embodiment, the present embodiment provides a disk link exception handling test apparatus, which includes the following functional modules.
The command sending module 401: sending a command for reading information of the disk to be tested to the disk to be tested through an SCSI bus;
the information receiving module 402: receiving relevant information read from a disk to be tested returned by the SCSI bus;
the parameter judgment module 403: judging whether the parameter actual value of the returned related information is different from a preset parameter theoretical value or not, and if so, successfully injecting the disk link error; the preset parameter theoretical value is different from the actual value of the returned related information parameter under the normal transmission condition;
the number of error injections count module 404: counting the successful times of the error injection, and adding 1 to the count every time the error injection is successful;
the first state detection module 405: detecting whether a test end where the device is located sends out a link abnormity prompt, whether the test end executes offline operation and whether a standby test end normally runs;
the second state detection module 406: and detecting whether the testing end of the device sends out the unavailable prompt of the disk slot.
It should be noted that any test end can be used as a master control or a backup control, and therefore, all the functional modules are arranged on any test end.
The above disclosure is only for the preferred embodiments of the present invention, but the present invention is not limited thereto, and any non-inventive changes that can be made by those skilled in the art and several modifications and amendments made without departing from the principle of the present invention shall fall within the protection scope of the present invention.
Claims (2)
1. A disk link exception handling test method is characterized in that a disk to be tested is respectively connected with a first test end and a second test end; the method comprises the following steps:
the first test end executes the disk link error injection method for multiple times to inject the disk link error;
counting the successful times of the error injection and monitoring the counting value in real time, wherein 1 is added to the counting when the error injection is successful;
when the number of successful times of error injection exceeds a first preset number, detecting whether the first test terminal sends a link abnormity prompt, the first test terminal executes offline operation, and the second test terminal normally operates;
if not, the test is failed, and the test is stopped;
if so, the test is passed, and the first test end and the second test end can normally process the link abnormity;
after the first test end and the second test end can normally process the link abnormity and pass the test, the method also comprises the following steps:
the second test end executes a disk link error injection method to inject disk link errors;
when the error injection is successful, detecting whether the second test end sends out a prompt that the disk slot is unavailable;
if the disk slot unavailability prompt is sent out, the test is passed, and the disk slot to be tested can normally process the link abnormity;
if the disk slot unavailability prompt is not sent, continuing to execute the disk link error injection method to perform disk link error injection;
if the second test end does not send the prompt that the disk slot is unavailable after the error injection is successfully performed for the second preset times, the test is failed, and the test is stopped;
the disk link error injection method comprises the following steps:
the magnetic disk to be tested and the test end are both connected to an SCSI bus;
the test end sends a command for reading information of the disk to be tested to the disk to be tested through the SCSI bus;
the test end receives the relevant information which is returned by the disk to be tested and is read according to the disk information reading command through the SCSI bus;
the test end judges whether the parameter actual value of the returned relevant information is different from a preset parameter theoretical value;
if the difference is not the same, the error injection of the disk link is successful; the preset parameter theoretical value is different from the actual value of the returned related information parameter under the normal transmission condition.
2. A disk link exception handling test device is characterized in that the disk link exception handling test device is configured at a test end and comprises a disk link error injection unit,
a command sending module: sending a command for reading information of the disk to be tested to the disk to be tested through an SCSI bus;
an information receiving module: receiving relevant information read from a disk to be tested returned by the SCSI bus;
a parameter judgment module: judging whether the parameter actual value of the returned related information is different from a preset parameter theoretical value or not, and if so, successfully injecting the disk link error; the preset parameter theoretical value is different from the actual value of the returned related information parameter under the normal transmission condition;
the device also comprises a control device which is used for controlling the operation of the device,
the error injection times counting module: counting the successful times of the error injection, and adding 1 to the count every time the error injection is successful;
the device also comprises a control device which is used for controlling the operation of the device,
a first state detection module: detecting whether a test end where the device is located sends out a link abnormity prompt, whether the test end executes offline operation and whether a second test end normally runs;
a second state detection module: detecting whether a test end where the device is located sends out a disk slot unavailable prompt;
the test end comprises a first test end and a second test end, and the disk to be tested, the first test end and the second test end are all connected to the SCSI bus;
the first testing end executes the disk link error injection unit for multiple times to inject the disk link errors, and simultaneously executes the error injection frequency counting module to count the error injection success frequency and monitor the counting value in real time, wherein the counting is added with 1 every time the error injection succeeds; when the number of successful times of error injection exceeds a first preset number, executing a first state detection module to detect whether the first test end sends a link abnormity prompt, executing offline operation by the first test end and normally operating the second test end; if not, the test is failed, and the test is stopped; if so, the test is passed, and the first test end and the second test end can normally process the link abnormity;
after the first test end and the second test end pass the link abnormity processing test, the second test end executes the disk link error injection unit to perform disk link error injection; when the error injection is successful, executing a second state detection module to detect whether the second test end sends out a prompt that the disk slot is unavailable; if the disk slot unavailability prompt is sent out, the test is passed, and the disk slot to be tested can normally process the link abnormity; if the disk slot unavailability prompt is not sent, continuing to execute the disk link error injection unit to perform disk link error injection; if the second test end still does not detect whether the second test end sends the warning that the disk slot is unavailable after the error injection is successfully performed for the second preset times, the test is failed, and the test is stopped.
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