JPS6019528B2 - Automatic volume recognition processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an automatic volume recognition processing method, particularly in a data processing device having an automatic hardware volume recognition mechanism, when the hardware automatic volume recognition mechanism is in a state where it cannot operate effectively. If the above mechanism does not work automatically (the input/output device has no function), a software automatic volume recognition module that activates the above mechanism is prepared, and the above mechanism is supported by software. The present invention relates to an automatic volume recognition processing method.

Conventionally, automatic volume recognition mechanisms (hereinafter referred to as hard AVRs) have been provided that automatically recognize whether or not a desired recording medium has been set up on a magnetic tape device or magnetic disk device.

The hard AVR is activated based on a device end signal being sent from the device when the operator sets up a certain recording medium in the device and presses a button, for example. It will be done like this. That is, the device
The system is started by an end signal and automatically reads the contents of the volume label existing on the recording medium, and the system confirms whether the desired recording volume has been set up. The confirmation process by the hard AVR is referred to as temporary mount process in this specification.
As described above, the functions of the hard AVR are provided, but since the hard AVR is activated by the device end signal, it may not necessarily function satisfactorily in the following cases.

i.e., initial program loading (IPL) before a program is loaded into the system.
Hard AVR does not start for devices that have been set up previously, that is, are in a ready state.

(B} Needless to say, if the input/output device does not have the function of issuing a device end signal when setting up a recording medium, the hard AVR function will not work.

[B] If the device end signal disappears due to a hardware failure, the hardware AVR function will not work.

If the temporary mounting process does not end due to a hardware failure or medium failure while the hardware AVR is activated by the above device end signal and is performing temporary mounting processing such as accessing the recording medium, the hardware AVR will
The VR function is not activated for playback, and the hard AVR function does not function.

The present invention aims to solve the above points,
The purpose of this invention is to support the functions of the hard AVR by means of software, and to improve the automatic volume recognition processing function as a whole.

Therefore, in the automatic volume recognition processing method of the present invention, when a recording medium is set up in the input/output device, the input/output monitoring program starts the hardware automatic volume recognition mechanism, and the hardware automatic volume recognition mechanism starts. In a data processing system having a function of executing a temporary mount processing operation including the process of removing the volume label of the set up recording medium, one of the input/output devices connected to the data processing system 1
Ready information indicating whether a recording medium is set up in the input/output device and temporary mount information indicating whether the input/output device is temporarily mounted or not are stored for each input/output device. A unit control block, a software automatic volume recognition module that software-basedly examines the contents of the unit control block, detects input/output devices that are in a ready state and a fully mounted state, and activates the above-mentioned hardware automatic volume recognition mechanism. - a supervisor with processing to issue startup commands at predetermined intervals to the software automatic volume recognition module;
The present invention is characterized in that a program is created so that the software automatic volume recognition module specifies an input/output device and activates the hardware automatic volume recognition mechanism. This will be explained below with reference to the drawings.
The figure shows an explanatory diagram of an embodiment for explaining the method of the present invention.

In the figure, 1 is a data processing device, 2 is a main storage device that is built into the data processing device, 3 is a terminal device, 4 is an input/output device, and 5 is a console. In addition, in the figure, well-known channel control devices and channels are omitted to simplify the explanation. Also 6
numeral 7 is a known supervisor program which has the function of monitoring the entire system; numeral 7 is a software automatic volume recognition module (hereinafter referred to as software AVR) prepared in the present invention; and numeral 8 is a known volume management module. 9 is a well-known input/output monitoring program that has a function of controlling access processing for input/output devices; 1 is a well-known unit control block (UCB); ), which is stored in the main storage device 2 during processing, which is the object of the present invention, and stores control information regarding each input/output device (device), and 11 is an initiator that can use a certain volume. 12 is a hardware automatic volume recognition mechanism, 13 is a recording medium or volume, 14 is a ready-to-use device that is attached to an input/output device, and 15 is an overlay controller that issues a request to mount a recording medium, so to speak, corresponding to a processing program. represents. First, the operation of a conventional system having only a hard AVR will be briefly explained.

(1} When the initiator 11 issues a mount request to use a certain volume, the volume management module 8 is notified of the mount request.

{2) The volume management module 8 issues an instruction to the operator to mount the volume (which can be considered to be the same as a recording medium) as shown in the figure. The instructions are printed out in the form of a message on the console 5 indicating which volume should be set to which input/output device. {3}
On the other hand, the volume management module 8 enters a volume attachment waiting state as shown in the figure.

(4) The operator 5 receives the above message, sets the predetermined volume 13 on the input/output device 4, and presses the button 14.

{5} This causes the input/output device 4 to issue a device end signal, which is received by the input/output monitoring program 9.

{6) As a result, the input/output monitoring program 9 activates the hard AVR 12.

'7} The hard AVR 12 determines whether or not it was in a volume installation wait state for the input/output device,
If it is in the waiting state, the next process is performed.

■ That is, the volume label existing on the volume set up above was read and the specified volume was set up. The volume management module 8 is notified that the state has entered the ready state.

{9} On the other hand, in the unit control block, corresponding to each input/output device, the corresponding input/output device is in the ready state (R
DY) or not in a ready state (RDY), information on whether it is temporarily mounted (MNT) or not mounted (MNT), etc. In any case, the temporary mounting by the above hard AVR 1-2 is recorded. When the process is completed, information RDY and information MNT are set for the input/output device.

When the volume management module 8 is notified that the above process has entered the ready state, the module 8 releases the illustrated volume mount wait state and executes the volume mount process.

(11) The module 8 then reports to the initiator 11 that the mounting process has been completed.

As mentioned above, the system with the conventional hard AVR operates, but as mentioned at the beginning of this specification, the system with the case sail [immediate C
}The functions of the hard AVR 12 are not utilized in the dish. Therefore, in the present invention, the following functions are added to support the above-mentioned hardware AVR 12.

That is, (1) in the supervisor program 9, (i) at the time of initial program loading of the system, (
ii) For example, a function is provided to start the software AVR 7 every time one minute has elapsed.

(0) At the time of the initial program loading, the software AVR 7 activates the hard AVR 12 for all input/output devices.

That is, the input/output monitoring program 9 described above is the hardware AVR 12.
Soft AVR7 starts up in the same way as when you start up the software AVR7. (m) When each of the above times elapses, the software AVR7
examines the contents of the unit control block 10 and determines whether it is in the ready state but in the unmounted state (RDY
・Identifies the input/output device in the MNT) state and activates the corresponding hardware AVR 12.

(N) When editing the system, set the recording medium as described above.
For input/output devices registered as input/output devices that cannot emit a device end signal when
7 supports the hard AVR 12 by using the above function (m).

(V) In the event of a hardware failure, the software AVR7 uses function (W) by dividing the device into those that need to support the hardware AVR12 from now on with the software AVR7 and those that only need to be supported once. and support.

The following processing is performed by the above-mentioned added functions.

That is, it goes without saying that (12) the processing by the hardware AVR 12 operates the functions described in (11) above.

In the case of the present invention, the following process is performed in addition to the above process. (13) When initial program loading is executed in the system, the supervisor program 9 starts the software AVR 7.

(14) The software AVR 7 issues an activation signal for activating the hard AVR 12 to all input/output devices in the system through the above function.

(15) Upon activation, each hardware AVR 12 executes an existing function, that is, a temporary mount process such as reading the contents of a volume label.

(16) As mentioned above, for the input/output device that cannot emit a device end signal when setting a medium, the software AVR 7 uses the above-mentioned self function (m) to update the contents of the unit control block 10 at regular intervals. Then, start up the hard AVR 12 and execute the temporary mounting process.

(17) As in case [C} above, there is an input/output device where the device end signal is not being sent from the input/output device due to some kind of failure, so the software AVR7 uses the above function (m). The hard AVR 12 is activated at regular intervals based on the contents of the unit control block 10.

At this time, the software AVR7 will change to the hard AVR12 only once.
It is checked whether or not it is sufficient to start up the , and if not, it is started at the above-mentioned fixed time intervals. (1
8) As in case {D) above, even though the hard AVR 12 has been activated by the device end signal,
There are cases where the temporary mount process is not completed.

Therefore, the software AVR 7 uses the above function m to start up the hard AVR 12 once again and have it execute the temporary mount process. At this time, for example, if a failure occurs in the recording medium itself and the contents of the volume label cannot be known, the hard AVR 12 may be activated repeatedly until the recording medium is removed. become. In addition, there may be an input/output device that becomes ready when there is a system failure and the system is working normally, or an input/output device that temporarily completes the temporary mounting process normally once the hard AVR 12 is restarted. In this case, one activation is sufficient. As explained above, according to the present invention, a software automatic volume recognition module is provided in addition to a hardware automatic volume recognition mechanism, so that the former is supported by the latter. Therefore, it is possible to enjoy the automatic volume recognition function in each case as described at the beginning of this specification. In addition, the software automatic volume recognition module supports the hardware automatic volume recognition mechanism to the extent necessary, thereby minimizing the increase in system processing load. Although the above description has been made with respect to a magnetic tape device, it goes without saying that the invention is similarly applicable to magnetic disk devices and the like.

[Brief explanation of the drawing]

The figure shows an explanatory diagram of an embodiment for explaining the method of the present invention. In the figure, 1 is a data processing device, 2 is a main storage device, 3 is a terminal device, 4 is an input/output device, 5 is a console, 6 is a supervisor/supervisor program, 7 is a software automatic volume recognition module, 8 is a volume management module, 9 is an input/output monitoring program, 10 is a unit control block, 1
1 is an initiator, 12 is a hardware automatic volume recognition mechanism, 13 is a recording medium or volume, and 14 is a button.

Claims (1)

[Claims] 1. The input/output monitoring program activates the hardware automatic volume recognition mechanism when the recording medium is set up in the input/output device, and the hardware automatic volume recognition mechanism is activated as described above. In a data processing system having a function of executing a temporary mounting operation including a process of reading a volume label of a recording medium, one of the above-mentioned input/output devices connected to the data processing system 1
For each input/output device, ready information indicating whether a recording medium is set up in the input/output device and temporary mount information indicating whether the input/output device is in a temporarily mounted state are stored. a unit control block, a software automatic volume recognition module that softwarely examines the contents of the unit control block, detects an input/output device that is in a ready state and is in a partially mounted state, and activates the hardware automatic volume recognition mechanism; A supervisor having a process of issuing a startup command to the software automatic volume recognition module at predetermined intervals.
An automatic volume recognition processing method characterized in that a program is created, and the software automatic volume recognition module specifies an input/output device and activates the hardware automatic volume recognition mechanism. 2 The above software automatic volume recognition module is
2. The automatic volume recognition processing method according to claim 1, wherein said method is activated when an initial program is loaded in said data processing system. 3. The software automatic volume recognition module is configured to perform the above-mentioned automatic volume recognition module on an input/output device in which the hardware automatic volume recognition mechanism is not automatically started based on the recording medium being set up in the input/output device. Claim 1 is characterized in that it is activated based on activation from a supervisor program and activates the hardware automatic volume recognition mechanism.
3. The automatic volume recognition processing method according to item 1 or 2.