CN102902487B - Hard disc data access system - Google Patents

Abstract

A hard disk data access method, comprising the following steps: Establishing step: establishing a second hard disk root directory in the first hard disk whose sector storage capacity of the computer is a preset value, and setting up a second hard disk root directory when the sector storage capacity is not the preset value Set up a recording table in the second hard disk of value, and this recording table is used for recording the storage area of each data in this second hard disk; The second hard disk data access step: when the user stores data in this second hard disk root directory, When accessing data or deleting data, use the first hard disk as a data transfer station to store the data in the second hard disk, or access the data or delete the data from the second hard disk. The invention also provides a hard disk data access system. The invention can realize the data access to the hard disk whose sector storage capacity is not 512Byte.

Description

HDD data access system

technical field

The invention relates to a data access system, in particular to a hard disk data access system.

Background technique

Traditional hard disks generally use 512Byte as the unit to divide the track into sectors equally, so the storage capacity of each sector is 512Byte. At present, many kinds of hard disks with a sector storage capacity of not 512 Byte have gradually come out, such as hard disks with a sector storage capacity of 520 Byte, hard disks with a sector storage capacity of 4096 Byte, and so on. Due to compatibility issues, some operating systems such as WindowsXP, Linux and other operating systems do not have drivers corresponding to hard disks with a sector storage capacity other than 512Byte. access. Although modifying the driver corresponding to the hard disk in the operating system can realize data access to the hard disk with a sector storage capacity of not 512Byte, but as the types of hard disks increase due to different sector storage capacities, modifying the corresponding driver of the hard disk It is also difficult for the program to make the operating system support data access to all kinds of hard disks.

Contents of the invention

In view of the above, it is necessary to provide a hard disk access system, which can use the first hard disk with the sector storage capacity as the preset value as a data transfer station to realize the operating system's second hard disk whose sector storage capacity is not the preset value. Hard disk data access.

A hard disk data access system, comprising: a building module, which is used to create a second hard disk root directory in the first hard disk whose sector storage capacity of the computer is a preset value, and when the sector storage capacity is not the preset value Set up a recording table in the second hard disk of value, and this recording table is used for recording the storage area of each data in this second hard disk; When storing data, accessing data or deleting data, use the first hard disk as a data transfer station to store the data in the second hard disk, or access the data or delete the data from the second hard disk.

Compared with the prior art, the hard disk access system of the present invention can use the first hard disk with a sector storage capacity as a preset value (such as 512 Byte) as a data transfer station, so that the operating system does not set the sector storage capacity as the preset value. value for data access on the second hard drive.

Description of drawings

FIG. 1 is an operating environment diagram of a preferred embodiment of the hard disk data access system of the present invention.

Fig. 2 is a functional block diagram of a preferred embodiment of the hard disk data access system of the present invention.

FIG. 3 is an example diagram of the record table in FIG. 1 .

Fig. 4 is a flow chart of a preferred embodiment of the hard disk data access method for storing data in the present invention.

FIG. 5 is a flow chart of a preferred embodiment of the hard disk data access method of the present invention for accessing data.

FIG. 6 is a flow chart of a preferred embodiment of the hard disk data access method of the present invention for deleting data.

Description of main component symbols

computer 100 512 hard disk 1 HDD data access system 10 operating system 11 Non-512 hard disk root directory 12 Non-512 HDD 2 Record Form 20 Build modules 101 get module 102 first judgment module 103 find module 104 first transfer module 105

record module 106 query module 107 second transfer module 108 The second judgment module 109 delete module 110

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

detailed description

Referring to FIG. 1 , it is an operating environment diagram of a preferred embodiment of the hard disk data access system of the present invention. In the present embodiment, the hard disk data access system 10 is applied in a computer 100, and the computer 100 includes a first hard disk (hereinafter referred to as "512 hard disk") 1 with a sector storage capacity of 512 bytes (Byte), and A second hard disk with a sector storage capacity of not 512 Bytes (hereinafter referred to as "non-512 hard disk") 2 . The 512 hard disk 1 is communicatively connected with the non-512 hard disk 2 .

The hard disk data access system 10 is stored in the 512 hard disk 1 , and an operating system 11 is also installed in the 512 hard disk 1 . The operating system 11 has a driver corresponding to the 512 hard disk 1 , and the driver enables the operating system 11 to access data in the 512 hard disk 1 . At the same time, since the operating system 11 does not have a driver corresponding to the non-512 hard disk 2, the operating system 11 cannot directly access the data in the non-512 hard disk 2. The data is a directory or a file. The directory is a tree structure, that is, the parent directory can contain subdirectories, and the subdirectories can contain files. The file can be audio, text document, video, etc.

In the 512 hard disk 1, a non-512 hard disk root directory 12 (or called the second hard disk root directory 12) is set up. The hard disk 2 is a folder in the 512 hard disk 1, that is, it is not the root directory 12 of the 512 hard disk. If the user stores data in the root directory 12 of the non-512 hard disk, it means that the user wishes to store data in the non-512 hard disk 2 .

The hard disk data access system 10 is used to set up the non-512 hard disk root directory 12, and when the user accesses data in the non-512 hard disk root directory 12, the data is stored in the non-512 hard disk 1 with the 512 hard disk 1 as a data transfer station. Hard disk 2, or read the data from non-512 hard disk 2.

Referring to FIG. 2 , it is a functional block diagram of a preferred embodiment of the hard disk data access system of the present invention. The hard disk data access system 10 includes a building module 101, an acquisition module 102, a first judgment module 103, a search module 104, a first transfer module 105, a record module 106, a query module 107, a second transfer module 108, and a second judgment module 109 and delete module 110. The module referred to in this embodiment is a program segment that completes a specific function, and is more suitable for describing the execution process of software in the computer 100 than a program. In other embodiments, the modules 102-110 can also be collectively named as one module, such as the second hard disk data access module.

The establishment module 101 is used to establish the non-512 hard disk root directory 12 in the 512 hard disk 1, and establish a record table 20 in the non-512 hard disk 2. The initial content of the record table 20 is empty. Since the non-512 hard disk 2 stores data in a chained storage mode, a data may be stored in several storage areas of the non-512 hard disk 2, and the recording table 20 is used to record each data from the beginning of each storage area of the non-512 hard disk 2. start address and end address.

As shown in FIG. 3 , it is an example diagram of the recording table 20 . The recording table 20 records the storage area of the directory A in the non-512 hard disk 2 . This directory A contains file a, which is stored in two storage areas in non-512 hard disk 2, the start address of the first storage area is **00, the end address is **01, and the second storage area The start address of the storage area is **05, and the end address is **07.

The obtaining module 102 is used for obtaining the name and size of the first data when the user stores the first data in the root directory 12 of the non-512 hard disk, and assigning a corresponding ID number to the first data. The first data may be a directory or a file. If the first data is a file, the obtaining module 102 assigns a corresponding ID number to the file; ID number.

The first judging module 103 is used to read the content in the recording table 20, and judge whether the non-512 hard disk 2 has enough available storage space to store the first data according to the content and the size of the first data. Specifically, since the recording table 20 records the storage area of all data stored in the non-512 hard disk 2 in the non-512 hard disk 2, that is, the recording table 20 records the used storage space of the non-512 hard disk 2, the non-512 The available storage space of the non-512 hard disk 2 can be obtained by subtracting the used storage space from the total storage space of the hard disk 2 . If the available storage space of the non-512 hard disk 2 is greater than the size of the first data, it is determined that the non-512 hard disk 2 has enough available storage space to store the first data.

The search module 104 is used to find the storage area for storing the first data from the non-512 hard disk 2 according to the content of the record table 20 when the non-512 hard disk 2 has enough available storage space to store the first data.

According to the record of the storage space used by the non-512 hard disk 2 in the recording table 20, the available storage space of the non-512 hard disk 2 can be calculated. Since the data in the non-512 hard disk 2 may be stored discontinuously, the available storage space may be composed of a series of discontinuous storage blocks. For example, as shown in Figure 3, the start address of the first storage area of file a in the non-512 hard disk 2 is **00, the end address is **01, the start address of the second storage area is **05, The end address is **07, a storage block is formed between the first storage area and the second storage area because there is no data stored, and the starting address of the storage block is the address of the first storage area end address, and the end address of the storage block is the start address of the second storage area.

The search module 104 can respectively obtain the start address and the end address of the series of storage blocks according to the records of the recording table 20, thereby traversing the series of storage blocks. When there is a storage block enough to store the first data, the search module 104 finds an area from the storage block as the storage area of the data according to the size of the first data, for example, the starting address of the storage area is the The start address of the storage block, the end address of the storage area is the start address of the storage area plus the size of the first data. If none of the series of storage blocks is sufficient to store the first data, the search module 104 finds several storage blocks from the series of storage blocks, and the storage space formed by the several storage blocks Enough to store the first data, the search module 104 finds a storage area for storing the data from the several storage blocks according to the size of the first data.

The first transfer module 105 is used for reading the first data from the non-512 hard disk root directory 12, and transfers the first data to the search module 104 for storing the first data by a SCSI (SmallComputerSystemInterface, small computer system interface) command. In the storage area of a data, the mark of the first data is stored in the non-512 hard disk root directory 12, and the mark includes attributes such as ID number and name of the first data. When the user accesses the mark of the first data, the first data can be accessed. For example, the first data is a piece of video, and the mark of the first data is an icon of the video. When the user clicks on the icon, the video can be started to be played.

The recording module 106 is used to record the name and ID number of the first data, and the start addresses and end addresses of all storage areas of the first data in the non-512 hard disk 2 in the record table 20 .

The obtaining module 102 is also used to obtain the ID number of the second data when the user accesses the mark of the second data in the root directory 12 of the non-512 hard disk. The access includes viewing or modifying the second data.

The query module 107 is used to query the start addresses and end addresses of all storage areas of the second data in the non-512 hard disk 2 in the record table 20 according to the ID number of the second data.

The second transfer module 108 is used to read the second data from the non-512 hard disk 2 according to the start address and the end address of all storage areas of the second data in the non-512 hard disk 2, and transfer the second data to the non-512 hard disk 2. 512 In the root directory 12 of the hard disk, for the user to access the second data.

The second judging module 109 is used for judging whether the second data has been modified in the non-512 hard disk root directory 12 when the user stops accessing the second data, for example, the user closes the video or application as the second data.

The first transfer module 105 is also used to transfer the modified second data to the non-512 hard disk 2 when the second judging module 109 judges that the second data has been modified in the root directory 12 of the non-512 hard disk, and by The record module 106 modifies the record of the second data in the record table 20 , including the start address and end address of the storage area of the second data in the non-512 hard disk 2 .

The first transfer module 105 is further configured to directly transfer the second data to the non-512 hard disk 2 when the second judging module 109 judges that the second data has not been modified in the root directory 12 of the non-512 hard disk.

The obtaining module 102 is also used to obtain the ID number of the third data when the user deletes the mark of the third data in the root directory 12 of the non-512 hard disk.

The query module 107 is also used to query the start address and end address of all storage areas of the third data in the non-512 hard disk 2 in the recording table 20 according to the ID number of the third data.

The deletion module 110 is used to find and delete the third data in the non-512 hard disk 2 according to the start address and the end address of all storage areas of the third data in the non-512 hard disk 2, and delete the third data in the recording table simultaneously. All records in 20 include the name and ID number of the third data, and the start address and end address of all storage areas of the third data in the non-512 hard disk 2 .

Referring to FIG. 4 , it is a flowchart of a preferred embodiment of the hard disk data access method for storing data according to the present invention.

Before entering step S11, the establishment module 101 first establishes the non-512 hard disk root directory 12 in the 512 hard disk 1, and establishes the record table 20 in the non-512 hard disk 2. The initial content of the record table 20 is empty. The record table 20 is used to record the start address and end address of each data in each storage area of the non-512 hard disk 2 .

Step S11, when the user stores the first data in the root directory 12 of the non-512 hard disk, the obtaining module 102 obtains the name and size of the first data, and assigns a corresponding ID number to the first data.

Step S12, the first judging module 103 reads the content in the recording table 20, and judges whether the non-512 hard disk 2 has enough available storage space to store the first data according to the content and the size of the first data. If it is not 512 that the hard disk 2 has enough available storage space to store the first data, then go to step S13, and if it is not 512 that the hard disk 2 does not have enough available storage space to store the first data, then end the process.

Step S13 , the search module 104 finds the storage area for storing the first data from the non-512 hard disk 2 according to the content of the recording table 20 .

Step S14, the first transfer module 105 reads the first data from the non-512 hard disk root directory 12, transfers the first data to the storage area for storing the first data by SCSI commands, and in the non-512 The first data mark is stored in the root directory 12 of the hard disk.

Step S15 , the recording module 106 records the name and ID number of the first data, and the start addresses and end addresses of all storage areas of the first data in the non-512 hard disk 2 in the record table 20 .

Referring to FIG. 5 , it is a flow chart of a preferred embodiment of the hard disk data access method of the present invention for accessing data.

Step S21, when accessing the tag of the second data in the root directory 12 of the non-512 hard disk, the obtaining module 102 obtains the ID number of the second data.

In step S22 , the query module 107 searches the recording table 20 for the start addresses and end addresses of all storage areas of the second data in the non-512 hard disk 2 according to the ID number of the second data.

Step S23, the second transfer module 108 reads the second data from the non-512 hard disk 2 according to the start address and the end address of all storage areas of the second data in the non-512 hard disk 2, and transfers the second data to The non-512 hard disk root directory 12 is for users to access the second data.

Step S24, when the user stops accessing the second data, the second judging module 109 judges whether the second data has been modified in the root directory 12 of the non-512 hard disk. If the second data has been modified in the non-512 hard disk root directory 12, go to step S25. If the second data has not been modified in the non-512 hard disk root directory 12, go to step S26.

Step S25, the first transfer module 105 transfers the modified second data to the non-512 hard disk 2, and the recording module 106 modifies the record of the second data in the recording table 20, including the second data in the non-512 hard disk. The start address and end address of the storage area in 2.

Step S26, the first transfer module 105 directly transfers the second data to the non-512 hard disk 2 .

Referring to FIG. 6 , it is a flow chart of a preferred embodiment of the hard disk data access method of the present invention for deleting data.

Step S31 , when the user deletes the mark of the third data in the non-512 root directory 12 of the hard disk, the obtaining module 102 obtains the ID number of the third data.

In step S32, the query module 107 searches the recording table 20 for the start addresses and end addresses of all storage areas of the third data in the non-512 hard disk 2 according to the ID number of the third data.

Step S33, the deletion module 110 finds and deletes the third data in the non-512 hard disk 2 according to the start address and the end address of all storage areas of the third data in the non-512 hard disk 2, and deletes the third data in the recording table simultaneously. All records in 20 include the name and ID number of the third data, and the start address and end address of all storage areas of the third data in the non-512 hard disk 2 .

In this embodiment, the sector storage capacity of the first hard disk 1 is 512 Byte, and the sector storage capacity of the second hard disk 2 is not 512 Byte as an example for illustration. Those skilled in the art should understand that the sector storage capacity of the first hard disk 1 can also be other preset values, such as 4096 Byte, and the sector storage capacity of the second hard disk 2 is not 4096 Byte.

The above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced. Without departing from the spirit and scope of the technical solution of the present invention.

Claims (2)

1. A hard disk data access system, characterized in that the system comprises: The establishment module is used to establish a second hard disk root directory in the first hard disk whose sector storage capacity of the computer is a preset value, and establish a record table in the second hard disk whose sector storage capacity is not the preset value , the recording table is used to record the storage area of each data in the second hard disk; and The second hard disk data access module is used for storing data, accessing data or deleting data in the root directory of the second hard disk; Wherein when storing data in the root directory of the second hard disk, the second hard disk data access module stores data in the second hard disk through the following steps: Obtain the name and size of the data, and assign the corresponding ID number to the data; Find out a storage area for storing the data in the second hard disk according to the content of the recording table; Transferring the data to the storage area for storing the data, and storing a mark of the data in the root directory of the second hard disk, the mark including the name and ID number of the data; Record the name and ID number of the data, and the storage area of the data in the second hard disk in the recording table; Wherein when accessing data in the root directory of the second hard disk, the second hard disk data access module accesses data from the second hard disk through the following steps: Get the ID number of the data; Query the storage area of the data in the second hard disk in the recording table according to the ID number of the data; Read the data according to the storage area of the data in the second hard disk, and transfer the data to the root directory of the second hard disk for users to access the data; When stopping accessing the data, it is judged whether the data has been modified in the root directory of the second hard disk; When the data has been modified in the root directory of the second hard disk, transfer the modified data to the second hard disk, and modify the record of the data in the recording table; When the data has not been modified in the root directory of the second hard disk, directly transfer the data to the second hard disk; Wherein when deleting data from the second hard disk, the second hard disk data access module deletes data from the second hard disk through the following steps: Get the ID number of the data; Query the storage area of the data in the second hard disk in the recording table according to the ID number of the data; Find and delete the data in the second hard disk according to the storage area, and delete all records of the data in the record table. 2. The hard disk data access system as claimed in claim 1, wherein when the second hard disk has enough available storage space to store the data, the second hard disk data access module is based on the contents of the recording table. A storage area for storing the data is found in the second hard disk.