JPS6299841A - Control system for auxiliary storage device - Google Patents

Abstract

PURPOSE:To attain the extension of a file without using any auxiliary storage device connected previously by connecting newly the auxiliary storage device that is not logically connected at a time point when the storage unit of a certain auxiliary storage device is short. CONSTITUTION:A file control 2a calls a disk control 10 when the blocks 8 of a disk device 6 connected logical and previously become short and a new disk device is required. When such a program is started, a name list 7 on the short device 6 is read. Then an inquiry is given to an operator for the volume name to be connected newly in case an idle block is detected. The new volume name if designated by the operator is added to the list 7 of the short device 6. Then the program requires to mount the new volume. When the operator mounts the new volume, a new list 7 is produced and a block map is initialized. Thus the logical connection is through with the device 6 and a file can be extended on the new device 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a management method for managing auxiliary storage devices such as magnetic disks used in computer systems.

[Conventional technology]

FIG. 3 is a diagram showing a conventional magnetic disk management system.

In the figure, 1 is the main memory in the computer, and 2 is the operating system (hereinafter referred to as O) running on the main memory 1.
8), and 2a is the above O8 as a file management means.
File management is a program included in 2, 3 is CP
U, 4 is a shaft control device, 5 is a disk control device, 6
is a plurality of magnetic disk devices provided as auxiliary storage devices, 7 is a name list of logically connected disk devices 6 recorded in advance on each disk device 6, and 8 is a block (memory unit) of the disk device 6. ), 9 is a block map indicating whether the block 8 is used or not, and this block map 9 is rewritten every time a file is recorded or erased.

Next, the operation will be explained. First, the file management 2a generates a file on the disk device 6 having the name (volume name) specified by the job control command. At this time, since the recordable free blocks 8 usually have lost their physical continuity due to erasure, re-recording, etc., the file management 2a stores the free blocks 8 on the disk device 6 in the block map 9. Search from the beginning and use the forward chain and backward chain to use them in logical succession. Furthermore, when there are no free blocks 8 on the disk device 6 that is currently being searched, the file management 2a changes the name and name on the disk device 6.
Check the restore and search for disk devices 6 that have been logically combined in advance. If there is a next disk device 6, file generation continues using the empty block 8 there.

Here, if a terminator appears, "2" 11° Lureno generation is given up.

[Problem that the invention seeks to solve]

Since the conventional management method is configured as described above, there is no problem within one auxiliary storage device, but when configuring files among multiple auxiliary storage devices, it is necessary to It was necessary to logically combine the wax auxiliary storage devices, and it was necessary to estimate the file size to a certain extent. Therefore, there is an upper limit to how files can be expanded, and eventually it becomes impossible to handle the increasing size of files, and long-running jobs may end abnormally due to lack of files, or the file system may need to be reconfigured. There was a problem.

This invention was made to solve the above-mentioned problems, and aims to provide a management method that allows files to be expanded even when there is no auxiliary storage device connected in advance. .

[Means for solving problems]

The auxiliary storage device management method according to the present invention includes a dynamic linking means that logically connects a new auxiliary storage device when the storage unit of one auxiliary storage device runs out. They are configured so that they each constitute a file.

[Effect]

The dynamic linking means in this invention, when one auxiliary storage device runs out of storage units, newly combines the auxiliary storage devices that have not yet been logically combined, and extends the file to this combined auxiliary storage device. Perform on the device.

〔Example〕

An embodiment of this invention will be described below. In FIG. 1, the main memory device 1 to block map 9 are the same as the conventional ones. 10 is a disk management for logically combining the new disk device 6. This disk management 10 is also included in 052 like the file management 2a,
This constitutes the dynamic management means of the present application. This disk management 10
A flowchart showing the performance of one embodiment is shown in FIG.

Next, the operation will be explained. File management 2;3 is
When a new disk device is required due to a shortage of empty blocks 8 in the disk devices 6 that have been logically combined in advance, the disk management IO shown in the flowchart of FIG. 2 is called. When this program is started, it reads frame restores on increasingly scarce disk units (step 1).

Check the list for free space (step 2) and select the new volume.

In other words, check whether the disk devices can be combined. If there is no free space, the file manager 2a is informed that the volumes cannot be combined and the process ends (step 10).

If there is space, the operator is provided with the name of the volume to be newly combined (step 3).The operator can specify the volume name if there is a free disk drive, or does not need to specify it if it is inconvenient. The program checks the operator's response (step 4). If no volume name is specified, the program notifies the file management 2a to that effect and ends (step 1).
0). If a volume name has been specified, the new volume name is added to the name restore on the missing disk device (step 5).

Next, the program requests mounting of the new volume (step 6). When the operator mounts the volume, he creates a name list for the new volume (step 7) and initializes the block map (step 8). Now that the logical combination of disk devices has been completed, the completion is notified to the file management 2a (step 9).
. The file can now be expanded onto the new disk drive.

In the above embodiment, the auxiliary storage device was described as a magnetic disk device, but the present invention can be applied to various auxiliary storage devices for the main storage device, such as magnetic tape and optical disks.

〔Effect of the invention〕

As described above, the auxiliary storage device management system according to the present invention is equipped with a dynamic linking means for logically combining a new auxiliary storage device when one auxiliary storage device runs out of storage units. By configuring files so that they are mutually distributed between storage devices, there is no upper limit on file expansion, so there is no need to estimate the file size in advance, and it also prevents long-running jobs from ending abnormally due to a lack of files. This has the effect of eliminating the need to reconfigure the file system.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram according to an embodiment of the present invention, FIG. 2 is a flowchart of disk management in the embodiment, and FIG. 3 is a system configuration diagram according to a conventional example. ■...Main storage device, 2...Operating system, 2a...File management (file management means),
6...Magnetic disk device (auxiliary storage device), 8...
Block (memory unit), 10... Disk management (dynamic linking means). Note that the same reference numerals are used for the middle part of the figure or corresponding parts.

Claims (1)

[Claims] In an auxiliary storage management method in which storage units of an auxiliary storage device are logically contiguous using a file management means to form a file, a new auxiliary storage device is created when one auxiliary storage device runs out of storage units. An auxiliary storage device management method characterized in that a dynamic linking means for logically linking is provided so that files are mutually configured between a plurality of auxiliary storage devices.