JPH0246567A - Medium mounting processing system for memory device with automatic carrier - Google Patents

Abstract

PURPOSE:To early detect the event at a processor side when an abnormality is present at the inputting and mounting of a storage medium by providing a time monitoring processing means to execute the time monitoring at a time interval shorter than the maximum time necessary for the loading of the storage medium. CONSTITUTION:A time monitoring processing part 13 executes the monitoring at the time interval shorter than the maximum time necessary for the loading of a storage medium 23 inputted to an input output device 24 by a carrier 21. When the report of NOT READY TO READY is not present in the monitoring time and the time-out is executed, a condition reading processing part 14 is activated, the condition reading processing part 14 issues the input output instruction to read the condition of the input output device 24, and when the report of the device condition is executed from a condition reporting part 26, an abnormality detecting processing part 15 discriminates whether the input output device 4 is in the loading of the storage medium or not. When the device is not in the loading, the abnormality is recognized to occur, the message to the operator is outputted and such a processing is executed. Thus, the abnormal event can be detected in a short time.

Description

[Detailed Description of the Invention] [Summary] Automatic transport that issues input/output commands to a storage device equipped with an automatic transport device such as a collective mass storage device, loads a storage medium, and detects whether the storage medium is normal or abnormal. If there is an error in inserting or mounting a storage medium regarding the media mount processing method of a storage device with a device,
The purpose is to enable early detection of such events on the processing device side.

A time monitoring processing means that performs time monitoring at time intervals shorter than the maximum time required for loading a storage medium with respect to an input/output command issued for the purpose of receiving a loading completion report from an input/output device; , a state reading processing means for reading the state of the input/output device, and a two-hour monitoring processing means for determining whether or not loading is in progress based on the read state, and if loading is in progress.

Continue to monitor the time again, if it's not loading.

and an abnormality detection processing means that determines that an abnormality has occurred.

[Industrial application field]

The present invention issues an input/output command to a storage device equipped with an automatic transportation device, such as a collective mass storage device, loads the storage medium, and detects whether the storage medium is normal or abnormal. Regarding the mount processing method.

[Conventional technology]

FIG. 4 shows an example of the conventional method.

In a collective mass storage system (CMSS), a designated magnetic tape is selected from a storage where a large number of magnetic tapes are stored, and a transport device is used to select the specified magnetic tape.

It has a function to transport the magnetic tape to the magnetic tape unit and automatically mount it.

Conventionally, the process of mounting a storage medium (magnetic tape) on this collective massive storage device has been performed as shown in FIG. FIG. 4(A) shows the mounting process on the host processing device side, and FIG. 4(B) shows the mounting process on the host processing device side.

This represents mounting processing on the CMSS device side.

Hereinafter, explanation will be made according to ① to 0 shown in FIG. 4.

■ The host processing device sends a cartridge movement command to the transport device to transfer the magnetic tape to be input/output.
Instructs to move from the hangar to the magnetic tape unit.

(2) In response to this instruction, the transport device takes out the specified magnetic tape from the storage and inserts it into the magnetic tape unit.

(2) When the transport of the magnetic tape is completed, the host processing device issues a dummy I10 containing, for example, a VOL read I10 command. This input/output command is not intended for actual input/output, but is issued for the purpose of receiving a report on the completion of loading of the inserted magnetic tape. Since it takes time to load the magnetic tape on the magnetic tape unit and become usable, it is necessary to know when it ends.
Issue dummy I10.

Furthermore, by issuing this dummy I10, the device side:
The device enters the non-tready state, and then, when loading is completed and becomes ready, a non-tready TO ready (NRTR) interrupt is generated to report the completion of loading.

(1) to (2) When the magnetic tape unit detects that a magnetic tape cartridge has been inserted by the transport device, it takes in the cartridge from its entrance and performs a loading process so that it can be read and written.

■ Check whether the loading was performed normally, and if it is normal, perform the processing [phase].

■ If the loading is abnormal, determine whether the cause of the abnormality is tape winding sagging.

If the tape is not fully wound, control is transferred to the processing [phase].

■ If the cause of the abnormality is tape winding sagging, in order to resolve this situation, feed the tape to the end and then rewind it three times. Processes (1) to (2) are then repeated until the slack in the tape winding is eliminated or a predetermined number of gluing trials is reached.

■ If loading is completed normally, if an abnormality other than sagging tape occurs, or if sagging tape does not recover even after a specified number of attempts,
In response to dummy I10, loading completion is reported by interrupting Not Ready TO Ready.

■ On the host processing device side, after issuing dummy I10,
Enters WAIT state to wait for notification of Not Ready To Ready. Furthermore, in order to perform error handling when there is no report from the device side for a period longer than the maximum time required for loading, time monitoring for a period longer than the maximum time Tmax required for loading is performed.

(2) If a non-tready-to-ready report is received within the monitoring time, a VOL read I10 is issued to instruct reading of the volume label (VOL) of the loaded magnetic tape. If there is no report of Not Ready TO Ready within the monitoring time, timeout error processing is performed.

0 In the magnetic tape unit, the magnetic tape is rewound to VOLIJ-code 10 and the VOL is read.

[Problem to be solved by the invention]

Conventionally, when mounting a storage medium in the device section of a storage device equipped with an automatic transport device, as shown in FIG.
The Not Ready To Ready report issued when the device takes in the medium, loads it, and becomes ready.
The mount is completed.

However, if an event occurs in which the medium transported by the transport device stops at the entrance of the device and the device cannot recognize that the medium has been inserted, the Not Ready TO Ready report will not be issued forever.

There is a problem in that the maximum time T max required for loading is waited, and the detection of this abnormal event is delayed.

On the other hand, if the Tmax monitoring time is shortened, even if the problem can be recovered by tape forwarding and tape rewinding due to slack tape winding,
According to the conventional method, a problem arises in that an error occurs.

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned problems and to enable early detection of an abnormality on the processing device side when there is an abnormality in loading or mounting a storage medium.

[Means to solve the problem]

FIG. 1 is a diagram explaining the principle of the present invention.

In FIG. 1, 10 is a processing device consisting of a CPU and memory, 11 is a medium movement instruction unit that instructs the movement of a storage medium from a hangar in order to mount the storage medium, and 12 is a unit for receiving reports of non-tready To Ready. a dummy I10 issuing unit that issues a target input/output command; 13 a time monitoring processing unit that time-monitors reports from the device side; 1;
Reference numeral 4 represents a state reading processing unit that issues an input/output command to read the state of the device when the monitoring time has elapsed, and 15 represents an abnormality detection processing unit that detects the occurrence of an abnormality based on the read state information.

Further, 20 is a storage device with an automatic transport device, 21 is a transport device that transports storage media, 22 is a hangar that stores a large number of storage media, 23 is a storage medium to be mounted, and 24
25 is an input/output device that performs input/output to the storage medium; 25 is a loading unit that loads the inserted storage medium;
Reference numeral 26 represents a status reporting unit that reports the status of the device in response to a request from the processing device side.

The time monitoring processing unit 13 according to the present invention performs monitoring for one hour at time intervals shorter than the maximum time required for loading the storage medium 23 inputted into the input/output device 24 by the transport device 21, and The CPU 20 waits for a non-tready TO ready report indicating the completion of loading from the 20 side or for the monitoring time to elapse.

If there is a report of non-tready TO ready before the monitoring time has elapsed, it will be considered as loading complete as before.
Move on to the next process, such as reading the volume label.

If there is no report of Not Ready TO Ready within the monitoring time and a timeout occurs, the status reading processing unit 14 is activated, and the status reading processing unit 14 issues an input/output command to read the status of the input/output device 24. As a result, when the status reporting unit 26 reports the device status, the abnormality detection processing unit 1
By 5.

It is determined whether the input/output device 24 is loading a storage medium.

If it is not loading, it is recognized as an abnormality.

Handles failures, such as outputting messages to the operator. If loading is in progress, control is returned to the 5-hour monitoring processing unit 13 and the process is repeated in the same manner.

[Effect]

The present invention differs from the conventional system in the ninth order.

fa) The monitoring time by the time monitoring processing unit 13 is not longer than the maximum time required for loading.

It's a short time.

fbl Reads the device status from the processing unit when the monitoring time has elapsed.

(C1 Checks the read status, and if loading is not performed, it is recognized that an abnormal event has occurred; if loading is performed, monitoring is repeated for 2 hours again.

As a result, even if, for example, the storage medium is stuck in the input slot and the loading process is not started, the abnormal event can be detected in a short period of time. In addition, since time monitoring is repeated during loading, if a problem is recovered by a device-side tape retrieval, such as when tape winding is slack, the problem can be processed normally without being treated as an abnormality. Can be done.

〔Example〕

FIG. 2 shows an example of a system to which the present invention is applied, and FIG. 3 shows a processing flow according to an embodiment of the present invention.

The present invention is applied to a system having a collective mass storage system (CMSS), such as the one shown in FIG.

In FIG. 2, 10 is a host processing unit, 30 is an operator console, 31 is a CMSS input/output request unit such as a utility program that accesses the CMSS, 32 is an allocation unit that allocates CMSS devices, and 33 is a CMSS A CMSS management table having management information for storage media, etc., 34 a CMSS control unit that performs device control such as mounting/dismounting for the CMSS, 35 a mount processing unit, and 36 a process for starting input/output and processing for input/output interrupts, etc. Represents the input/output control unit.

40 is a collective mass storage system (CMSS), in which CMC is a CMSS controller, THU is a magnetic tape automatic operation unit that transports a magnetic tape cartridge, MTU is a magnetic tape unit, and CBLL is a magnetic tape cartridge 2. This is a hangar that stores the equipment.

The CMSS input/output request unit 31 uses the 0MSS 40 to
When performing processing such as dump/load, the CMSS control unit 34 is requested in advance to mount a magnetic tape on the magnetic tape unit MTU.

In response to the mount request, the mount processing unit 35 in the CMS, Q control unit 34 issues an instruction to convey the magnetic tape from the hangar CBLL via the input/output control unit 36, and performs processing such as reading the volume label. After this mounting process is completed, the CMSS input/output request unit 31 accesses the magnetic tape via the input/output control unit 36 in response to an input/output execution request (EXCP).

Although the present invention relates to the mount processing section 35 in the CMSS control section 34 in this example,
- The same applies not only to collective mass storage devices that handle IJ media, but also to other storage devices with automatic transport devices that store a large number of optical disks in a storage space and have a mechanism to automatically load them. It is possible to apply the present invention to shorten the detection time of abnormal events related to timeouts.

FIG. 3 shows the processing of the mount processing unit 35 shown in FIG.
The flow of processing on the CMSS device side is shown.

The processing on the CMSS device side shown in FIG. 3(b) is as follows.

The processing is exactly the same as the conventional method explained in FIG.

Processing ■ and Processing ■ shown in FIG. 3(a) are the same as before, but in process 0, the notification of Not Ready To Ready is waited, and instead of the maximum time required for loading Tmax, Tmax /n ( however.

n is a number greater than 1) and waits for the monitoring time to elapse. If there is a report of Not Ready To Ready within the monitoring time, the OL U-do I10 is issued by the process @, and the volume label reading process is performed.

Before the report of Non-Treddy To Lady was released.

When the time Tmax/n has elapsed, process (2) is performed.

Sends an MTU status adjustment command and inputs the status of the magnetic tape unit MTU. Depending on the status information,
Currently, the magnetic tape unit MTU.

Whether or not loading is in progress is determined based on the process [phase].2 If loading is not in progress, the mounting process is ended and processing for the abnormality is performed. If loading is in progress, control is returned to process (2), and processes 0 to (2) are repeated until a predetermined number of times is reached or until the total monitoring time reaches a predetermined time.

FIG. 3 shows a processing flow according to an embodiment of the present invention. FIG. 4 shows an example of a conventional method.

In the figure, 10 is a processing device, and 11 is a medium movement instruction section.

12 is a dummy I10 issuing unit, 13 is a time monitoring processing unit 71
4 is a status reading processing section, 15 is an abnormality detection processing section, 20
21 is a storage device with an automatic transport device, 21 is a transport device, 22 is a hangar, 23 is a storage medium, 24 is an input/output device, 25 is a loading section, and 26 is a status reporting section.

〔Effect of the invention〕

As explained above, according to the present invention, abnormal event detection, which previously required at least the maximum time required for loading, can be performed in a short time according to a monitoring time that can be arbitrarily determined. It becomes like this.

Patent applicant Fujitsu Limited (one other person) agent
Patent attorney Yoshiyoshi Ogasawara (2 others)

[Brief explanation of the drawing]

FIG. 1 is a diagram explaining the principle of the present invention. FIG. 2 shows an example of a system to which the present invention is applied.

Claims (1)

[Claims] An input/output device (24) that performs input/output to an attached storage medium, and a hangar (22) that stores a plurality of storage media.
and a transport device (21) for transporting the storage medium from the hangar to the input/output device. A time monitoring processing means (13) for monitoring time at a time interval shorter than the maximum time required for loading a storage medium with respect to an input/output command issued for the purpose of receiving a loading completion report from an output device; The state reading processing means (14) reads the state of the input/output device when the time elapses, and the state reading processing means (14) determines whether or not loading is in progress based on the read state, and if loading is in progress, the time monitoring processing means 1. A medium mounting processing method for a storage device with an automatic transport device, comprising: abnormality detection processing means (15) which continues time monitoring and determines that an abnormality has occurred if loading is not in progress.