TWI707235B - Storage apparatus managing system and storage apparatus managing method - Google Patents

Abstract

A storage apparatus managing method, applied to a first storage apparatus and a second storage apparatus coupled to an electronic apparatus, wherein the first storage apparatus comprises a local registering region and a global registering region, comprising: (a) receiving a read request indicating reading a target data unit from the second storage apparatus; (b) confirming if the global registering region has the target data unit; (c) if yes, reading the target data unit from the global registering region, if not, confirming if the local registering region has the target data unit; and (d) reading the target data unit from the local registering region if the local registering region has the target data unit, reading the target data unit from the second storage apparatus if the local registering region does not have the target data unit.

Description

Storage device management system and storage device management method

The present invention relates to a storage device management system and a storage device management method, and particularly relates to a storage device management system and a storage device management method that increase the reading speed by providing a mechanism of a temporary storage area in an electronic device.

In recent years, portable electronic devices such as mobile phones, tablet computers, and wearable electronic devices have become more popular. However, portable electronic devices usually have the problem of small capacity. To increase the capacity of the portable electronic device, it is usually to increase the internal memory capacity of the portable electronic device itself, or to increase the capacity of the portable electronic device itself. The device is equipped with an external memory card. However, portable electronic devices with large internal memory capacity are usually quite expensive. Since the external memory card is relatively small in size, it is easy to lose it after being removed from the portable electronic device, and some portable electronic devices do not support the external memory card.

Therefore, flash disks dedicated to portable electronic devices are becoming more and more popular. This type of flash drive not only provides a larger memory capacity for portable electronic devices, but is also convenient for users to carry. However, limited by the transmission speed of the data transmission interface of the portable electronic device, the data access speed of the pen drive is usually quite limited.

Therefore, there is a need for a method or system that can increase the access speed of a pen drive.

Therefore, an object of the present invention is to provide a storage device management system that can increase the data reading speed.

Another object of the present invention is to provide a storage device management method that can increase the data reading speed.

An embodiment of the present invention discloses a storage device management system for managing a first storage device and a second storage device connected to an electronic device. The first storage device includes a regional temporary storage area and a global temporary storage area. The global temporary storage area is used to temporarily store data that has been read from the second storage device, and the regional temporary storage area is used to temporarily store data that has been read from the second storage device and other candidate data. The storage device The management system includes: a storage device management program; and a control module for controlling the second storage device. If the storage device management program receives a read request for reading a target data unit from the second storage device, it will first confirm whether the global temporary storage area has the target data unit, and if the global temporary storage area has the target data unit Target data unit, the storage device management program makes the electronic device read the target data unit from the global temporary storage area. If the global temporary storage area does not have the target data unit, the storage device management program confirms that the area is temporarily stored Whether there is the target data unit in the area, if there is the target data unit in the regional temporary storage area, the storage device management program makes the electronic device read the target data unit from the regional temporary storage area, if the regional temporary storage area does not For the target data unit, the storage device management program enables the electronic device to read the target data unit from the second storage device through the control module.

Another embodiment of the present invention discloses a storage device management system for managing a cache memory in a mobile phone and a flash drive connected to the mobile phone, comprising: a control module for controlling the flash drive; and a Storage device management program. When the mobile phone wants to read a target data unit from the flash drive, the storage device management program will make the control module copy the target data unit to the cache memory, and make the mobile phone from the portable The disk or the cache memory reads the target data unit.

Other embodiments of the present invention also disclose storage device management methods corresponding to the foregoing embodiments, and the steps can be deduced from the above-described embodiments, so the details are not repeated here.

According to the foregoing embodiment, by providing a temporary storage area in the electronic device, the data reading speed of the electronic device can be greatly increased, so as to improve the problem of slow data reading speed in the prior art.

100: electronic device

101: Storage Device Management Program

103: The first storage device

105: second storage device

107: Control Module

109: Global Temporary Storage Area

109_1: Global temporary storage buffer

109_2: Global Temporary File Area

111: Regional temporary storage area

700: electronic device

DU1-DU_100: data unit

DU_1a: Modified data unit

Fig. 1 shows a block diagram of a storage device management system according to an embodiment of the invention.

Figure 2 shows a flowchart of a storage device management method according to an embodiment of the invention.

Figures 3-4 are schematic diagrams illustrating the operation of the storage device management system according to an embodiment of the present invention.

FIG. 5 shows a flowchart of writing data into the global temporary storage area according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of the action when modifying the data of the second storage device according to an embodiment of the present invention.

Fig. 7 shows an embodiment of the present invention, and the actual application of the storage device management system or storage device management method provided by the present invention is presented.

In the following description, a number of embodiments are provided to illustrate the concept of the present invention. However, please note that in the following embodiments, each component can be implemented by hardware (for example, a circuit) or by hardware and software (for example, a program is written in a processor). In addition, the following embodiments are only for illustration, and the number, position, and action sequence of the components are not intended to limit the present invention.

Fig. 1 shows a block diagram of a storage device management system according to an embodiment of the invention. As shown in FIG. 1, the electronic device 100 includes a storage device management program 101 and a first storage device 103 (such as a cached RAM in the electronic device 100). The second storage device 105 (e.g. a The flash drive is connected to the electronic device 100 and includes a control module 107. The second storage device 105 can be removed from the electronic device 100. The storage device management program 101 can use file system modules (such as FATFS file system modules) corresponding to the file systems of the first storage device 103 and the second storage device 105 to control the first storage device 103 and the second storage device 105 Data access or zoning actions. The file system module can be installed in the second storage device 105, but can also be installed in the electronic device 100. In addition, the storage device management program 101 can be used to define the global temporary storage area 109 and the regional temporary storage area 111 in the first storage device 103 and manage the access actions of the global temporary storage area 109 and the regional temporary storage area 111. In one embodiment, the global temporary storage area 109 is used to temporarily store data that has been read from the second storage device 105, and the regional temporary storage area 111 is used to temporarily store data that has been read from the second storage device 105 And other candidate materials.

Moreover, the storage device management program 101 is also used to generate read or write commands to the control module 107, so that the control module 107 transmits data from the second storage device 107 to the first storage device 103 or writes data accordingly To the second storage device 107. The storage device management program 101 can be executed by a main processor, which can be the main processor of the electronic device 100 itself, that is, in addition to executing the storage device management program 101, the main processor is also used to control the electronic Other functions of the device 100, but the storage device management program 101 can also be executed by a processor independent of the main processor. The storage device management program 101 and the control module 107 can be regarded as a storage device management system. However, please note that in the following embodiments, the control module is installed in the second storage device. However, the control module can also be installed in the electronic device.

The electronic device 100 may be a portable electronic device, such as a mobile phone or a tablet computer. The first storage device 103 may be an internal storage device of the electronic device 100, such as RAM (Random Access Memory). The internal storage device can be a storage device that is set when the electronic device 100 leaves the factory, and it is difficult to change its capacity. In addition, the second storage device 105 may be an external storage device independent of the electronic device 100, such as a flash drive, a memory card, etc. This type of external storage device can be freely installed on or removed from the electronic device. Moreover, when the first storage device 103 is an internal storage device and the second storage device 105 is an external storage device, the data access speed of the first storage device 103 will be higher than that of the second storage device. Data access speed of the storage device 105.

In the conventional technology, if the data in the second storage device 105 is to be read, the data is directly read from the second storage device 105. As mentioned above, the data reading speed is limited by the speed of the data transmission interface between the second storage device 105 and the electronic device 100. Therefore, one of the concepts of the present invention is to copy at least part of the data in the second storage device 105 to the global temporary storage area 109 or the regional temporary storage area 111 in the first storage device 103. When reading data, it will first check whether the first storage device 103 has the data to be read. If so, it will be read from the first storage device 103 first, and if not, it will be read from the second storage device 105. Can greatly reduce the time of data reading. The detailed steps will be explained below.

Figure 2 shows a flowchart of a storage device management method according to an embodiment of the present invention, which includes the following steps:

Step 201

The electronic device 100 receives the read request.

For example, the user wants to read the target data unit in the second storage device 105 through the electronic device 100. The target data unit can be any form of data, for example, a file or LBA (Logical Block Address). In the following embodiments, the target data unit is LBA.

Step 203

It is confirmed whether there is a target data unit in the global temporary storage area 109, if yes, go to step 205, if not, go to step 207.

In one embodiment, the global temporary storage area 109 will contain data that has not been compiled as a file (such as LBA) and data that has been compiled as a file. In this embodiment, step 203 will first confirm whether the non-file data in the global temporary storage area contains the target data unit, if not, then confirm that the file in the global temporary storage area is Whether to include the target data unit. This step can make the reading speed faster. The reason is that if you want to confirm whether the file contains the target data unit, you need to open the file, confirm the data contained in it, and then close the file, which will increase the confirmation. The time required. Therefore, priority is given to checking whether the target data unit is included in the non-file data.

Step 205

The target data unit is read from the global temporary storage area 109.

Step 207

It is confirmed whether there is a target data unit in the regional temporary storage area 111, if yes, go to step 209, if not, go to step 211.

Step 209

Read the target data unit from the regional temporary storage area 111.

Step 211

The target data unit is read from the second storage device 105.

According to the steps in Figure 2, the storage device management method provided in this case will first read data from the first storage device 103, and only read data from the second storage device 105 if the first storage device 103 is not available. Therefore, the amount of data transmitted by the data transmission interface between the second storage device 105 and the electronic device 100 can be reduced, and the data reading speed can be improved. In detail, when the electronic device 100 receives a read request to read a target data unit from the second storage device 105, it will first confirm whether there is a target data unit in the global temporary storage area 109, and if so, then from the global temporary storage area 109 First read the target data unit, if not, then temporarily store it from the area The area 111 reads the target data unit. If there is no target data unit in the global temporary storage area 109 and the regional temporary storage area 111, the data unit is read from the second storage device 105. In this way, it is not necessary to read data from the second storage device 105 every time data is to be read, and the data reading speed can be improved.

In the following embodiments, it will be described in detail how to decide which data to be temporarily stored in the global temporary storage area 109 and the regional temporary storage area 111. The content of the present invention can be better understood by referring to FIGS. 2 and 3-4 together. With the following temporary storage method, the global temporary storage area 109 and the regional temporary storage area 111 can store data that may be read, so as to improve the reading of data from the global temporary storage area 109 and the regional temporary storage area 111 instead of The efficiency of reading data from the second storage device 105.

In the embodiment in Figure 3, it is assumed that the target data unit to be read is the data unit DU_3, and in the embodiment in Figure 3, neither the global temporary storage area 109 nor the regional temporary storage area 111 contains the data unit DU_3. . In this case, in addition to reading the data unit DU_3 from the second storage device, the data unit DU_3 will also be copied to the global temporary storage area 109 and the regional temporary storage area 111. In addition to the data unit DU_3, the non-target At least one candidate data unit outside the data unit is copied to the regional temporary storage area 111, such as the data units DU_1-DU_2 in Figure 3 and the data units DU_4-DU_100, which are data units within one address range of the data unit DU_3. The advantage of adopting this mechanism is that the data unit may not be read individually, but may be read continuously. For example, when reading a file, data units adjacent to the storage address will be read continuously. Therefore, the data unit within the one-bit address range of the data unit DU_3 is first copied to the regional temporary storage area 111 to reduce the possibility of directly reading data from the second storage device 105. After such a copy operation, both the global temporary storage area 109 and the regional temporary storage area 111 contain the data unit DU_3. Therefore, if the data unit DU_3 is to be read again, the data unit DU_3 will be read directly from the global temporary storage area according to the steps in Figure 2. 109 reads the data unit DU_3 without reading from the second storage device 105.

The embodiment in FIG. 4 is a continuation of the embodiment in FIG. 3, that is, in the embodiment in FIG. 4, the global temporary storage area 109 includes the data unit DU_3, and the regional temporary storage area 111 includes the data unit DU_1- DU_100. In the embodiment in Figure 4, the target data unit to be read is a data unit DU_4. According to the steps described in Figure 2, it will first confirm whether there is a data unit DU_4 in the global temporary storage area 109, but because the global temporary storage area 109 does not contain the data unit DU_4, it will check whether there is a data unit in the regional temporary storage area 111 DU_4. The regional temporary storage area 111 contains the data unit DU_4, so the data unit DU_4 is read from the regional temporary storage area 111, and the data unit DU_4 is copied from the regional temporary storage area 111 to the global temporary storage area 109.

As mentioned above, if the target data unit is read from the regional temporary storage area 111 or the second storage device 105, the target data unit will be copied to the global temporary storage area 109. Therefore, the present invention further provides an embodiment in which data is written into the global temporary storage area 109, which can further accelerate the speed of reading data. FIG. 5 shows a flowchart of writing data into the global temporary storage area according to an embodiment of the present invention. Please refer to FIG. 3 and FIG. 5 for a better understanding of the present invention. In one embodiment, the global temporary storage area 109 in Figure 3 further includes a global temporary storage buffer 109_1 and a global temporary file area 109_2. The global temporary storage buffer 109_1 is used to store non-file data, and The global temporary file area 109_2 stores files. The flowchart in Figure 5 contains the following steps:

Step 501

A write command for writing data to the global temporary storage area 109 is received. For example, if the target data unit is copied to the global temporary storage area 109 as described above, the control module 107 in FIG. 1 will receive the write command generated by the storage device management program 101.

Step 503

Check whether there is enough space in the global temporary storage buffer 109_1. If yes, go to step 505, if not, go to step 507.

Step 505

Write the data into the global temporary storage buffer 109_1 in a non-file form.

Step 507

Confirm whether there is enough space in the global temporary file area 109_2. If yes, go to step 509, if not, go to step 511.

Step 509

Write the data in the form of files into the global temporary file area 109_2.

Step 511

If neither the global temporary storage buffer area 109_1 nor the global temporary storage file area 109_2 has enough storage space, it means that the storage space stock of the global temporary storage area 109 is quite low. In this case, the data in the global temporary storage area 109 can be deleted. This delete action can delete all the data stored in the global temporary storage area 109, or only part of the data stored in the global temporary storage area 109. For example, only the older data in the global temporary storage area 109 can be deleted.

In one embodiment, steps 507-511 can be replaced by writing at least part of the data stored in the global temporary buffer 109_1 as a file and save it in the global temporary file area 109_2 to release part of the global temporary buffer Area 109_1, and write new data into the global temporary storage buffer 109_1.

As mentioned earlier, if you save the data as a file, you must open the file, read it, and then close it when searching for the data. This will reduce the speed of accessing the data. Therefore, in the global temporary storage area writing process in Figure 5, the data will be stored in a non-file form first, which can increase the speed of reading data in the global temporary storage area.

In one embodiment, since the global temporary storage area 109 and the regional temporary storage area 111 contain a fixed space, the present invention further provides for deleting the global temporary storage area 109 or the regional temporary storage area 111 under certain circumstances. The embodiment of the stored data avoids insufficient space in the global temporary storage area 109 and the regional temporary storage area 111. As described in the embodiment in FIG. 5, if the global temporary storage buffer area 109_1 and the global temporary storage file area 109_2 do not have enough storage space, the data in the global temporary storage area 109 will be deleted. In addition, in one embodiment, if the second storage device 105 is removed from the electronic device 100, the data stored in the global temporary storage area 105 cannot correspond to another storage device, so the global temporary storage area 109 will be deleted Data in.

In another embodiment, after reading a file containing the required data unit from the regional temporary storage area 111, the global temporary storage area 109 or the second storage device 105, delete the file stored in the regional temporary storage area 111 Candidate data unit for. Taking the embodiment in Figure 3 as an example, if a file A contains data units DU_3-DU_50, after the data unit DU_3 is read, the process in Figure 2 will continue to read the remaining DU_4-DU_50. After the file A has been read, since the candidate data units stored in the regional temporary storage area 111 are more related to the file A, the candidate data units stored in the regional temporary storage area 111 are deleted.

The user may modify the data originally stored in the second storage device 105 and then store the modified data back into the second storage device 105. In one embodiment, in this case, the global temporary storage area 109 and the regional temporary storage area 111 are updated at the same time, so as to synchronize data. Please refer to FIG. 6, which illustrates a schematic diagram of the action when modifying the data of the second storage device according to an embodiment of the present invention. As shown in Figure 6, after the required data unit DU_1 is read, according to the foregoing embodiment, whether the required data unit DU_1 is read from the second storage device 105, the global temporary storage area 109 or the regional temporary storage area 111 Taken, both the global temporary storage area 109 and the regional temporary storage area 111 will store the required data unit DU_1. If the content of the required data unit DU_1 is changed and it is modified to the required data unit DU_1a after the modification, and stored in the second storage device 105 to replace the original required data unit DU_1, the modified required data unit DU_1a It must be stored in the global temporary storage area 109 and the regional temporary storage area 111 at the same time to replace the original required data unit DU_1. Otherwise, when reading the modified required data unit DU_1a next time, the original required data unit DU_1 will be read from the global temporary storage area 109 or the regional temporary storage area 111 instead of the modified required data unit DU_1a.

In one embodiment, after the required data unit DU_1 is read and modified to the modified required data unit DU_1a, it is determined whether the required data unit DU_1 exists in the regional temporary storage area 111, and if the result is yes, then Replace the required data unit DU_1 in the regional temporary storage area 111 with the required data unit DU_1a after the modification. Similarly, it is determined whether the required data unit DU_1 exists in the global temporary storage area 109, and if the result is yes, the required data unit DU_1 in the global temporary storage area 109 is replaced by the modified required data unit DU_1a.

In one embodiment, the global temporary storage area 109 includes the aforementioned global temporary storage buffer 109_1 (non-file data area) and the global temporary file area 109_2 (file data area). The data unit DU_1a required after modification is required. When updating to the global temporary storage area 109, it will first confirm whether the required data unit DU_1 exists in the global temporary storage buffer 109_1. If so, replace the required data unit DU_1a in the global temporary storage buffer 109_1 with the modified required data unit DU_1 DU_1. If the required data unit DU_1 does not exist in the global temporary storage buffer 109_1 but the required data unit DU_1 exists in the global temporary file area 109_2, the modified required data unit DU_1a will replace the required data unit in the global temporary file area 109_2 DU_1. As described in the steps in Figure 5 of this case, there may be insufficient space in the global temporary buffer 109_1 but there is still space in the global temporary file area 109_2 when writing the required data unit to the global temporary buffer 109. . Therefore, the required data unit DU_1 may exist in the global temporary storage file area 109_2 but not in the global temporary storage buffer 109_1.

As mentioned above, when reading data from the second storage device in the prior art, the data is directly read from the second storage device, so the first storage device in the electronic device is not changed. Therefore, if an electronic device uses the storage device management method provided by the present invention, when the second storage device is read, the data of the first storage device in the electronic device will increase correspondingly. Fig. 7 shows an embodiment of the present invention, and the actual application of the storage device management system or storage device management method provided by the present invention is presented.

Fig. 7 shows an embodiment of the present invention, and the actual application of the storage device management system or storage device management method provided by the present invention is presented. In the example of Figure 7, the aforementioned first storage device Set as an internal storage device, and the aforementioned second storage device is an external storage device. As shown in FIG. 7, the electronic device 700 can be made to display a storage space configuration screen, which displays the internal storage space and the external storage space. When reading data from an external storage device, because the data is temporarily stored in the first storage device, the internal storage space may increase correspondingly. And as mentioned above, in one embodiment, if the second storage device is removed from the electronic device, the data stored in the global temporary storage area 109 and the regional temporary storage area 111 will be deleted. Therefore, if the second storage device is removed from the electronic device, a corresponding decrease in internal storage space may occur. The change in internal storage space caused by the foregoing embodiment can be derived from the description in FIG. 7, so it will not be repeated here.

According to the foregoing embodiment, by providing a temporary storage area in the electronic device, the data reading speed of the electronic device can be greatly increased, so as to improve the problem of slow data reading speed in the prior art. The foregoing descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the scope of the patent application of the present invention shall fall within the scope of the present invention.

100: electronic device

101: Storage Device Management Program

103: The first storage device

105: second storage device

107: Control Module

109: Global Temporary Storage Area

111: Regional temporary storage area

Claims (20)

A storage device management method is applied to a first storage device and a second storage device connected to an electronic device. The first storage device includes a regional temporary storage area and a global temporary storage area. The global temporary storage area is used for Temporarily store the data once read from the second storage device, and the regional temporary storage area is used to temporarily store the data once read from the second storage device and other candidate data. The storage device management method includes: (a) Receive a read request from the second storage device to read a target data unit; (b) confirm whether the global temporary storage area has the target data unit; (c) if the global temporary storage area has the target data unit, Then read the target data unit from the global temporary storage area, and if there is no target data unit in the global temporary storage area, confirm whether the target data unit exists in the regional temporary storage area; and (d) if the regional temporary storage area If there is the target data unit, the target data unit is read from the regional temporary storage area, and if there is no target data unit in the regional temporary storage area, the target data unit is read from the second storage device. The storage device management method according to claim 1, wherein the first storage device is an internal storage device inside the electronic device, and the second storage device is an external storage device independent of the electronic device. The storage device management method according to claim 1, wherein the step (b) further includes: first confirming whether the non-file data in the global temporary storage area contains the target data unit, and if not, confirming the global temporary storage Whether the file in the area contains the target data unit. The storage device management method according to claim 1, further comprising: if the target data unit is After reading from the regional temporary storage area or the second storage device, the target data unit is copied to the global temporary storage area. The storage device management method according to claim 4, wherein the global temporary storage area includes a global temporary storage buffer area and a global temporary storage file area, the global temporary storage buffer stores non-file data, and the global temporary storage File area stores files; when copying the target data unit to the global temporary storage area, it will first confirm whether the global temporary buffer has enough space, and if so, copy the target data unit to the global temporary buffer If there is no area, confirm whether the global temporary file area has enough space. If the global temporary file area has enough space, copy the target data unit to the global temporary file area. The storage device management method according to claim 4, wherein the global temporary storage area includes a global temporary storage buffer area and a global temporary storage file area, the global temporary storage buffer stores non-file data, and the global temporary storage File area stores files; among them, when copying the target data unit to the global temporary buffer, it will first confirm whether the global temporary buffer has enough space, and if so, copy the target data unit to the global temporary buffer If there is no buffer, at least part of the data in the global temporary buffer is converted into at least one file and stored in the global temporary file area, and then the target data unit is stored in the global temporary buffer. The storage device management method according to claim 4, further comprising: if it is detected that the second storage device is removed from the electronic device, deleting the data stored in the global temporary storage area. The storage device management method according to claim 1, further comprising: after reading the target data unit from the second storage device, copying at least one candidate data unit including the target data unit Go to the temporary storage area of this area. The storage device management method according to claim 8, further comprising: after reading a file containing the required data unit from the regional temporary storage area, the global temporary storage area or the second storage device, delete the area The candidate data units stored in the temporary storage area. The storage device management method according to claim 1, further comprising: modifying the read required data unit into a modified required data unit, and writing the modified required data unit into the second storage device When replacing the required data unit, if the regional temporary storage area or the global temporary storage area has the modified required data unit, the modified required data unit is also written into the regional temporary storage area or the global temporary storage area The temporary storage area replaces the required data unit. A storage device management system for managing a first storage device and a second storage device connected to an electronic device. The first storage device includes a regional temporary storage area and a global temporary storage area. The global temporary storage area is used for To temporarily store the data once read from the second storage device, and the regional temporary storage area is used to temporarily store the data once read from the second storage device and other candidate data. The storage device management system includes: a storage Device management program; a control module for controlling the second storage device; wherein if the storage device management program receives a read request for reading a target data unit from the second storage device, it will first confirm the global Whether there is the target data unit in the temporary storage area, if the target data unit is in the global temporary storage area, the storage device management program causes the electronic device to read the target data unit from the global temporary storage area, if the global temporary storage area If the target data unit does not exist in the area, the storage device manages The management program confirms whether there is the target data unit in the regional temporary storage area. If the regional temporary storage area has the target data unit, the storage device management program causes the electronic device to read the target data unit from the regional temporary storage area, If there is no target data unit in the regional temporary storage area, the storage device management program enables the electronic device to read the target data unit from the second storage device through the control module. The storage device management system according to claim 11, wherein the first storage device is an internal storage device inside the electronic device, and the second storage device is an external storage device independent of the electronic device. For example, the storage device management system of claim 11, wherein the storage device management program first confirms whether the target data unit is included in the non-file data in the global temporary storage area, and if not, then confirms the global temporary storage area Whether the file of contains the target data unit. The storage device management system according to claim 11, wherein if the target data unit is read from the regional temporary storage area or the second storage device, the storage device management program copies the target data unit to the global temporary Deposit area. The storage device management system according to claim 14, wherein the global temporary storage area includes a global temporary storage buffer area and a global temporary storage file area, the global temporary storage buffer stores non-file data, and the global temporary storage The file area stores files; when copying the target data unit to the global temporary storage area, the storage device management program will first confirm whether the global temporary buffer has enough space, and if so, copy the target data unit to If the global temporary storage buffer area is not available, confirm whether the global temporary storage file area has enough space, and if the global temporary storage file area has enough space, copy the target data unit to the global temporary storage file area. The storage device management system according to claim 14, wherein the global temporary storage area includes a global temporary storage buffer area and a global temporary storage file area, the global temporary storage buffer stores non-file data, and the global temporary storage The file area stores files; when the target data unit is copied to the global temporary buffer, the storage device management program will first confirm whether the global temporary buffer has enough space, and if so, copy the target data unit To the global temporary buffer, if not, first convert at least part of the data in the global temporary buffer into at least one file and save it to the global temporary file area, and then save the target data unit to the global Temporary buffer. The storage device management system according to claim 14, further comprising: if the storage device management program detects that the second storage device is removed from the electronic device, delete the data stored in the global temporary storage area. According to the storage device management system of claim 11, after the electronic device reads the target data unit from the second storage device, the storage device management program copies at least one candidate data unit containing the target data unit to Temporary storage area in this area. The storage device management system according to claim 18, wherein after the electronic device reads a file containing the required data unit from the regional temporary storage area, the global temporary storage area or the second storage device, the storage The device management program deletes the candidate data units stored in the regional temporary storage area. The storage device management system according to claim 11, wherein if the required data unit is modified into a required data unit after modification, and the required data unit after modification is written into the second storage When the device replaces the required data unit, if the area temporary storage area or the global temporary storage area has the modified required data unit, the storage device management program will also write the modified required data unit into the area The temporary storage area or the global temporary storage area replaces the required data unit.

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