A method for smooth expansion of virtual disk capacity

Abstract

The invention provides a virtual disk size smooth expansion method. The method includes the following steps of firstly, setting the size of a virtual disk and the save path of a corresponding mirror image document; secondly, mounting a filtration driver of the virtual disk, redirecting the read-write operation for the last sector of the virtual disk to the first sector, and reading formatting information of the virtual disk; thirdly, uninstalling the virtual disk, and modifying the size of the virtual disk and the corresponding mirror image document; fourthly, remounting the virtual disk to complete expansion of the size of the virtual disk. The virtual disk size smooth expansion method has the advantages that rapid and smooth expansion can be conducted on the virtual disk; no reestablishment is needed when the virtual disk in the large size needs to be used; the problem that a system automatically conducts 0 value supplementation in the formatting process in the past is solved, the wait time is shortened when the virtual disk is established, and function experience of a user is improved.

Description

technical field [0001] The invention relates to a method for smoothly expanding the capacity of a virtual disk. Background technique [0002] The application of virtual disk technology in data security is becoming more and more common. At present, there are two main methods of mapping virtual disks: mapping folders into virtual disks and creating mirror files and mapping them into virtual disks. Among them, although the method of mapping a folder into a virtual disk does not have the problem of falsely reporting the disk capacity and making it difficult to expand, it has the following disadvantages: lack of protection or weak protection, and it is difficult to meet the protection of security and privacy in the field of data security need. Therefore, the method of creating a virtual disk image file and mapping it into a virtual disk is the current mainstream. The advantage of this form of virtual disk is: it combines the encryption and decryption of the virtual disk driver, ...

AI Technical Summary

Problems solved by technology

Among them, although the method of mapping a folder into a virtual disk does not have the problem of falsely reporting the disk capacity and making it difficult to expand, it has the following disadvantages: lack of protection or weak protection, and it is difficult to meet the protection of security and privacy in the field of data security need

Therefore, the method of creating a virtual disk image file and mapping it into a virtual disk is the current mainstream. The advantage of this form of virtual disk is: it combines the encryption and decryption of the virtual disk driver, and when the virtual disk is not mounted, user files can be hidden in the There is no trace, and the files stored in it cannot be obtained by searching files, disk analysis, etc., but it also has the following disadvantages: 1. When creating a larger virtual disk, it is necessary to create an image file of the same size at the same time, and perform Initialization, which takes a long waiting time; 2. When performing formatting, it is necessary to write the backup of the first sector to the last sector of the virtual disk, which will result in no writing between the beginning of the file and this position The content of the file will be automatically filled with 0; 3. Currently, the size of the virtual disk is set when the image file is created, and capacity expansion is not supported. When the capacity cannot meet the usage requirements, only a larger capacity can be recreated. virtual disk, and then copy the original files to the newly created virtual disk, this process is also time-consuming and laborious

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