JPS58115567A - Disk volume interchange system - Google Patents

Abstract

PURPOSE:To use data efficiently, by coping data of the private area of the first operating system to a shared area by the first operating system to make it possible that the second operating system uses this data. CONSTITUTION:A disk volume 3 consists of an OS(A) private area, an OS(B) private area, and the shared area which operating systems OS(A) and OS(B) can access. An interchangeable controlling part 4 secures the space for the shared area and the OS(B) private area on the disk volume of the OS(B) by the OS(A), and the processing for making the space of the OS(B) private area into a disk volume for the OS(B) is performed by the OS(B), and this space is disconnected from the control of the OS(A) disk volume. Therefore, the OS(A) and the OS(B) are started alternately to execute file processings such as setting and change of labels and directories by which respective OSs can refer to data in the volume.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF THE INVENTION The present invention relates to a compatible processing method for disk volumes.
In particular, 114i is a disk volume compatible processing method that allows two types of O8 (Operating System) to manage space so that they do not infringe on each other's space and do not share data on a single disk medium. .

(2) Technical background Generally, 00S is changed due to computer system paste, etc., and conventional grograms and data are
If it cannot be used with the ``iJ''rO8, normally the company, its programs, and data are converted to the ``iJ''rO8, but in the process, it is imported as is into the new system, and 1m that can be used with the old O8 is converted. You may want to leave it. Furthermore, during the O8 development period of a new system, various new system commands (utilities) must be created and debugged on the block system before the development program is provided.

In such cases, it is desirable to be able to coexist and manage two different types of disk volumes on one medium.

(3) Conventional technology and gaps In the past, there were two methods for making disk volumes of different formats compatible: one method was to convert the format from one medium to another and copy the contents, and the other method was to use the same medium as is. ,O8
There is a method to convert the format internally. However, the former has the disadvantage that the entire contents of the medium must be converted every time a data change occurs, and the latter has the disadvantage that data processing takes time each time it is used.

(4) Purpose of the Invention The purpose of the present invention is to enable two types of O8 to share one disk medium without infringing on each other's space, and to easily and quickly use the data in the disk volume of the other O8. The object of the present invention is to provide efficient disk volume compatibility processing means for making the disc volume compatible.

(5) Structure of the Invention The present invention provides that when a general O8 manages the area of a disk volume, the positions and sizes of the used area and unused area are stored in a table, , I realized that the area other than the area that is the sum of those areas is not used in that O8, and lIJ! The area on the medium A is divided into a dedicated area for each of the two types of US, and a common area that can be used by both, and as a configuration of the invention, it has the first and second different US. In the data processing system, in order to share the disk volume used by the first O8 with the second US, the first O8 creates a dedicated area of the first O8, ml and 080 of 2)
A means for defining a shared area and a private area of the second O8, and a means for setting the private area of the second L)
8 to initialize the area so that only the second O8 can use it, and the first and second O8s use their respective dedicated areas, and f: The first O8 makes it available for use by the second O8 by copying it to a shared area.

(6) Embodiments of the Invention First, the configuration of a data processing system to which the present invention is applied will be explained with reference to FIG.

In Figure 1, 1 is the central processing unit, 2 is the main memory where two different O8s, 08 (Al and 08 (Bl), are stored, and 3 is the main memory where the two O8s share, so compatibility processing is performed. 4 is a compatible 1tIII control unit for performing *h disk volume compatibility processing M1, which will be described later; 5 is a compatibility control unit 4 that performs disk volume initialization, file processing, etc. It is an input/output processing section.

Compatible disk volume 3 is 08 (Al dedicated work area o
S (B) Dedicated area, O8 prisoners and OS (fil
It consists of a shared area that can be accessed from The main function of the compatibility system is to create a shared area and a dedicated 08 (08 mail) area on the 08 (5) disk volume.
S (113) Special #3'r! R Castle Space, < f O
Perform processing to create a disk volume for S (B), and
S^ The management of the disk volume is to make it a separate page.

Therefore, US (A) and OS (H) are started alternately, and file processing such as setting and changing the label and builf IJ is executed so that the data 1 in the volume can be viewed from each O8. do.

The present invention 1 will be explained below according to *Examples.

FIG. 2 is a schematic explanatory diagram of compatibility processing in the embodiment I) of the present invention. This implementation describes the process of converting a disk volume used by O8 to another OS (B)4. K in the figure and VOL (Volume
1 abel) +1 volume itself '1 and job type 7
6 labels, V T OC (Volume table
of content) ◆ Shows a table for managing *castles in the volume.

In stage 2 of the figure, the process of regenerating a large number of used areas and unused areas, which are normally finely distributed on the medium, into one delayed area for the disk volume of the OS LA) is performed. Let's do it.

A dedicated area space for the US(H) and a shared area for both O8s are set. At the same time, 08(5)
Reserve an unused area within the dedicated area. At this stage, all areas are VOL and VTOC (A) in O8 prison format.
It is managed by and accessible only by O84.

At stage (Ill), among the data in the O84 region,
o S (B) The data required for use in O
84 data format 7! I, in other words, stage (II)
Store it in the shared area set in .

In step (5), in step (If), O8 (
Regarding the area (B) designated as the exclusive area of (b),
08(B)t- is used to perform initialization processing to create the 08(B) disk volume format. As a result, area (B) +! , 08(B) format VTOc(B
) K to f), the used area (B), the unused area side, and the shared area are managed in an accessible manner. □ #VTOc (AJ and VTOC (8) and t!, 311th
Each O8 can communicate with each other by storing it in a specific address on the disk medium that can be accessed exclusively by O8 (A) and O8 (H) respectively, as shown in NK, or by converting it into a non-standard format. make the VTOC inaccessible.

In addition, so that OS (B) can also access the shared area, the shared area items registered in VTOCCA) are copied to VTOC (B) in the format o 8 (B).

Recently, as another example, the PACOM-V series o
An example of disk volume compatibility between UNIO8/F4 (hereinafter referred to as F4) and UNIO8/)'5 (hereinafter simply referred to as F5), which are s, will be described in detail.

In this embodiment, the disk polygon used in F4 can be used for convenience without infringing on the areas of F4 and F5.

First, the structures of disk volumes F4 and F5 are shown in Figures 4 and 5, respectively. The definitions of symbols and labels used in the diagram are shown below.

The volume 2 pel volume label is a label that manages the VTOC and the entire volume, and its position is cylinder 0. Track 0. It is fixed to record 2.

In FIGS. 6 and 7, F4. The schematic structure of each volume label of F'5 is shown.

VTOC VTOC grasps the usage status of the space on the volume,
It is a collection of control blocks to be managed.

The VT (JC) of the F4 volume consists of 256 bytes, and is composed of control items indicating the usage status of the VTOC and the location of the next VTOC, and area items 10- indicating the file area and the g!g area.

Consists of bytes in VTOC4X2 of F5 volume, V
It consists of control items that indicate the usage status of the TOC and the location of the next VTOC, and area items 42- that indicate the library area and file area.

VWACT VWACT is a 2-byte table that manages free space on a volume, and shows the usage status of VWACT and the next VW.
A control item indicating the ACT position and a ? ! 2 indicating the ti area
It consists of 50 area items.

The library and entity F5 employ the security machine #It for data on disk volumes. The entity is defined as the smallest unit on which the security S* structure operates, and the library is defined as the largest unit.

The entity in Dingpete is the entity control block (
ETCB). Also, all entity control blocks belong within some library domain and are managed by a library control block (LCB). In addition, Chobete's library can be accessed from the library catalog (LIBC) in the system residence volume.
) managed by

There are two types of entities, called members, whose data areas are allocated within the library, and entities called files, whose data areas are allocated outside the library. The members correspond to the members in the F4 split star order ring formation '7f file (PF). Also, the file is located at F4
1111m file (SF), Honbiki Oboro file (
IsF'), which corresponds to a direct definition file (DF).

[Export disk volume (MXPOkLT)] UN
In IO8/F4, the disk volume [JNI
A series of processing performed to enable use on O8/F5 is called EXPORT processing.

The general flow of EXPU)tT processing is shown in Figure 8).
The contents will be explained below.

■Reconfiguring automatic expansion files Since the management methods for automatic expansion files are different between UNIUS/F4 and UNIO8/F5, it is necessary to reorganize automatically expanded files into contiguous areas.

■Creation of XF5SPACW Create an area that can be freely used in F5 with a sequential file named XF58PACE.

■Creating files for library areas Create areas for libraries created with the EXPU TLB and BXPORTFL utilities as divided sequential files with only the necessary ridges.

■EX)'0RTVL(Export Volume
) -L-tility execution EXPORTTVL compresses the file area on the volume, and then changes the volume A type Y on the volume label.
This is a utility to change to F4-EXPORTED M volume.

■EXPORTFL (Export F'+Ie)
-Execution EXPORTFL of L-utility is the order of sorting on the column-
This is a utility that creates a library that manages configuration files (excluding XF 55PACE), index order-configuration files, and direct configuration files as entities.

The area of the library created by EXPORTFL is ■
The user specifies the one prepared in .

Also, the library area created here will be a non-standard file from the VTOC.However, files registered as entities in the library will not be changed in any way, so they can be freely accessed with F4. .

■WXPORTLB (Export Library
) Execution of the utility EXPORTLB is a utility that creates a library that manages all members in one split HA organization file as entities. In this case, the contents (data area) of the member of the diopter are duplicated into the created library.

The library area created by EXPORTLB is
The user specifies the one prepared in ■.

Furthermore, the library area created here becomes a non-standard file from the VTOC. However, the split order file, which is the source of the library, has not been changed in any way, so it can be freely accessed by UN I O8/F4.

[Importing a disk volume (IMPORT)] At F5, when using the disk volume EXPORTed at F4 (F4-EXPORTED volume), IMPORT processing must be performed. IM
PO processing is performed using IMPDA (ImportDi
rect Access Storage Device
e) Near? It is performed by 7 dos.

The IMPI)A command is specified by the user.
P (Temporary) %-do or P E
IMPORT processing is performed in one of the RM (Permanent) modes. In TEMP mode, the target volume is temporarily made available to the system and the DMNT DA (Dismountl) direct
Access Storage Device)
If you remove the volume with the command -r or perform an IPL again, it will become unusable (if you perform an IMPDA again, it will become unusable). PI! 'In RM mode, the target voice
It will be reconfigured as a K'LUNIO8/Fs volume and permanently registered in the system. however,
When IMPDA is performed in PERM mode, the volume becomes unusable in F4.

@Figure 8 (b) shows IMPOkLT in TEMP mode.
The general flow of the process will be shown and its contents will be explained below.

■Registering a volume serial number In F5, since the existence of multiple volumes with the same volume serial number is not allowed, the volume serial number is temporarily registered in the system. The volume serial number is a number for identifying a volume, and is stored in the volume label.

■Non-standardized XF58PACE
Change the file organization on the VTOC to a non-standard file so that it cannot be used.

■Library registration Libraries created with EXPORTFL and EXPORTLB\I: Temporarily register in the system so that they can be used in F5. Also, if there is a library created with F5, register it as well.

■ Creation of VTOC and VWACT If this is your first IMP O)LT, X F s 8
VTOC and vWACTllll-created during PACEQ,
Store in a volume label that is a soleno address. In this case, the area item of VTOC is an unused item, and v
wAc'rtctz, fi' in XF58PACE)
M area V! Register as a 2t-area.

Next K, IMPORT treatment mf)
The outline of the flow is shown in FIG. 8-J, and its contents will be explained below.

■Library registration EXPO) LTFL, the library created with EXPORTLB, and the library created with F5 are permanently registered in the system.

@Creating VTOC and VWACT Create VTOC and VWACT at the end of the area on the volume.
Create T.

v 'i' o CK is EXPU TFi,,EXP
OI (live 2 created with TLB, EXPORTF
Register the entities (files) managed by the library created in L and the library and entities (files) created in F5.

VWACTKe'! , All ivy areas that are not registered with VTOCK are registered as 9-key areas (excluding the volume label, VTOC, and VWACT areas).

■Registering volume serial number Permanently register the volume serial number in the system.

■ Change the volume label Change the volume type on the volume label to F5 volume, and set the first VTOC address of F4 and the last VTOC
Store binary zero in the address so that it cannot be used in F4.

w, 1 beyond F5 [V T OC7)” v, t,,
Stores the most ill VTOC address, the previous ItVWACT address, and other information used by F5.

(7) Effects of the Invention According to the present invention, when data is updated in one O8,
All you have to do is convert only the necessary parts on the same medium into a format that the other O8 can use (but since the converted data is in a shared area, even if the other O8 destroys it, the original data will remain intact). Since the data remains, it has the effect of making economical use of media, reducing the time required to convert data formats, and ensuring data security.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a system according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation of the first embodiment, FIG. 3 is an explanatory diagram of the label structure in the embodiment of FIG. 2, and FIGS. 4 to 8 The above are explanatory diagrams for other embodiments, Fig. 4 is a configuration diagram of a disk volume for F4, Fig. 5 is a configuration diagram of a disk volume for F5, and Fig. 6 is a diagram of a label configuration for F4. The figure is a label configuration diagram for F5, and Figures 8 (g), (b), and (c) are explanatory diagrams of the operating procedure. In the figure, 1 is a central processing unit, 2 is a main storage device, 3 is a compatible disk volume, 4 is a compatible control unit, and 54 is an input/output processing unit. Patent applicant Fujitsu Ltd. Daiune Patent Attorney Fumihiro Hase (1 other person) 11th O5 (AM Fire Sengo Seki Ibeke EP7+ (A) (B) Ritsu 8th (C)

Claims (1)

[Claims] In a data processing system having a first and a second different O8v, in order to share the disk volume used by the I@l O8 with the second O8, the first O8 adds an Ml means for establishing a dedicated area of the O8, a shared area of the first and second O8s, and a dedicated area of the second O8;
This is a dedicated area for the second O8, initialized by the second O8.
the first and second O8s use their respective exclusive areas;
A disk volume compatibility processing method in which the data in the private area of the first O8 is made usable by the second O8 by copying it to the shared area of the first O8.