TWI847396B - A thermal controlling system and method for solid state disk - Google Patents

Abstract

A thermal controlling system for a solid-state disk includes a detection module, a control module and an estimation module. The detection module detects the solid-state disk to obtain a read/write speed value, a temperature, and a time. The control module executes a start-stop program, and when the temperature is out of a predetermined temperature range, the control module adjusts the read/write speed of the solid state hard disk. After the control module executes the start-stop program, the estimation module executes the estimation program. The estimation module calculates the read/write speed estimate value according to the read/write speed value and time. The control module executes a control program. The control module controls the read/write speed of the solid state disk according to the estimated value of the read/write speed.

Description

Temperature control system and method for solid state hard disk

The present invention relates to technologies related to solid state drives, and in particular to a temperature control system and method for solid state drives.

During the operation of a solid-state drive (SSD), the operating temperature of the control chip or storage chip may gradually increase due to high ambient temperature or poor heat dissipation of the printed circuit board (PCB), and finally approach the preset warning temperature. At this time, in order to prevent the chip temperature from being too high and causing the control chip or storage chip to work abnormally, the SSD system speed is generally reduced to actively reduce the operating power consumption and thereby reduce the SSD chip temperature.

However, different brands use different methods to reduce SSD speed. Generally speaking, the simplest method is to adopt an open loop control method similar to Bang Bang control. That is, when the speed of the SSD is higher than a certain temperature preset value, the system speed of the SSD is reduced. When the temperature of the SSD drops to another temperature preset value, the system speed of the SSD is increased.

However, the most common problem with the on-off control is that in order to adjust the temperature, the SSD system speed will switch between high speed and low speed continuously, causing the entire computer system to experience a lag in storage speed and read/write speed. Worse still, it will cause the OS system to lag, affecting the user experience.

In view of the problems described in the previous technology, the solution proposed in this case is about a temperature control system for a solid state hard disk, including: a detection module, a control module and an estimation module.

The detection module is used to detect and obtain a read/write speed value, a temperature, and a time; the control module has a start/stop program and a control program: the control module executes the start/stop program, and when the temperature does not meet a temperature range value, the read/write speed of the solid state drive is adjusted; the control module executes the control program, and controls the read/write speed of the solid state drive according to a read/write speed estimated value; after the control module executes the start/stop program, the estimation module executes an estimation program, and calculates the read/write speed estimated value according to the read/write speed value and time.

This case also proposes another solution, which is about a temperature control method for a solid state hard disk, which is suitable for a solid state hard disk. The control method includes: continuously obtaining a read/write speed value, a temperature, and a time; executing a start/stop program, and when the temperature does not meet a temperature range value, adjusting the read/write speed of the solid state hard disk, and obtaining a time and a read/write speed value; executing an estimation program according to the read/write speed value and the time to obtain a read/write speed estimation value; and executing a control program according to the read/write speed estimation value to control the read/write speed of the solid state hard disk to meet the read/write speed estimation value.

This case controls the temperature of the solid state drive when it changes. The read and write speed estimate is estimated through the above temperature control method, and then the read and write speed estimate is used to control the read and write speed of the solid state drive. In this way, the read and write speed and temperature of the solid state drive can be quickly converged, so that the solid state drive can work within a temperature range.

10: Temperature control system

20: Detection module

30: Control module

40:Estimation module

50: Solid State Drive

51:Port

52: Processor

54: System bus

56: NAND flash memory

58: Static random access memory

60: Computer host

SP1: Read and write speed value

SP2: Low-speed reading and writing of values

SP3: High-speed reading and writing of values

SP4: Low-speed reading and writing of values

SP5: High-speed reading and writing of values

t1: first time

t2: Second time

t3: The third time

t4: The fourth time

t5: The fifth time

t6: The sixth time

T1: First preset temperature

T2: Second preset temperature

A1: First area

A2: Second area

A21: First sub-area

A22: Second sub-area

S80,S82,S84,S86: Steps

Figure 1 shows a schematic diagram of the connections between the components of the temperature control system.

Figure 2 shows a flow chart of the steps of the temperature control method.

Figure 3 shows the experimental data of temperature control in this case.

Figure 4 shows a schematic diagram of the relationship between the temperature of the solid state drive and time during the start-stop control period of the control module, and a schematic diagram of the relationship between the read and write speed of the solid state drive and time during the start-stop control period of the control module.

Please refer to FIG. 1 . This case is about a temperature control system 10 for a solid state hard disk, including: a detection module 20, a control module 30, and an estimation module 40.

Please refer to FIG. 1 , the detection module 20 is used to detect the read/write speed, temperature, and the time of the read/write speed change and temperature change of the solid state hard disk 50, and obtain a read/write speed value, a temperature, and a time. Among them, since the solid state hard disk will have a built-in controller to control the operation of the solid state hard disk, and most controllers have a built-in temperature detector to detect the internal temperature of the controller, in some embodiments, the temperature measured by the detection module 20 may refer to the internal temperature of the controller. Alternatively, the detection module 20 detects components other than the controller through other detectors, such as the outer shell temperature of the solid state hard disk, the ambient temperature, the NAND temperature, etc., and uses the above detection results as the temperature. By using the temperature control method of this case, the solid state drive 50 can be accurately maintained to operate within a stable temperature range.

Please refer to FIG. 1 , the control module 30 has a startup program and a control program. After the control module 30 executes the startup program, when the temperature does not match a temperature range value, the control module 30 adjusts the read and write speed of the solid state hard disk 50, and the control module 30 executes the startup program so that the estimation module 40 estimates the appropriate read and write speed. The control module 30 executes the control program and controls the read and write speed of the solid state hard disk 50 according to a read and write speed estimation value, so that the solid state hard disk 50 maintains working within a stable temperature range.

When the control module 30 is executing the startup and shutdown procedures, if the temperature is higher than the temperature range value, the control module 30 will control the read and write speed of the solid state hard disk 50 to decrease. After the temperature is lower than the temperature range value, the read and write speed of the solid state hard disk 50 will be increased to make the temperature higher than the temperature range value, so that the estimation module 40 can use the aforementioned secondary read and write speed adjustment to estimate the stable read and write speed value. On the contrary, when the temperature is lower than the temperature range value, the control module 30 will increase the read and write speed of the solid state hard disk 50. After the temperature is higher than the temperature range value, the read and write speed of the solid state hard disk 50 will be reduced to make the temperature lower than the temperature range value.

Therefore, after executing the startup and shutdown procedures, the control module 30 will at least allow the solid state drive 50 to experience a temperature higher than the temperature range value once and a temperature lower than the temperature range value once, so that the estimation module 40 can estimate a stable read and write speed value. In addition, the present case is not limited to the above-mentioned temperature higher than the temperature range value once and a temperature lower than the temperature range value once, and can also experience multiple temperatures higher than the temperature range value and temperatures lower than the temperature range value, so that the estimation module 40 can estimate the read and write speed value.

Please refer to FIG. 1 . After the control module 30 executes the start-stop procedure, the estimation module 40 executes an estimation procedure, and estimates the read-write speed value and time obtained by the control module 30 during the execution of the start-stop procedure to obtain the estimated read-write speed value. During the process of the control module 30 executing a start-stop procedure, the number of times the temperature is higher than the temperature interval value and the number of times the temperature is lower than the temperature interval value may be the same or differ only once. In some embodiments, for the convenience of calculation, the estimation module 40 estimates the estimated read-write speed value according to the read-write speed value and time obtained when the number of times the temperature is higher than the temperature interval value and the number of times the temperature is lower than the temperature interval value during the start-stop procedure is the same. In addition, when the system performs the second startup and shutdown procedure and the second estimation procedure, the estimation module 40 can only estimate based on the read/write speed value and time obtained during the second startup and shutdown procedure to obtain the second read/write speed estimation value; or it can estimate based on the read/write speed value and time obtained during the first startup and shutdown procedure and the second startup and shutdown procedure to obtain the second read/write speed estimation value. When the system performs the startup and shutdown procedure and the estimation procedure after the third time, the acquisition of the read/write speed estimation value is similar to the above, and will not be repeated here.

Please refer to Figure 3. Assume that the solid state hard disk 50 works at the read/write speed value SP1 when it is started, so that the temperature of the solid state hard disk 50 continues to rise. When the temperature reaches a first preset temperature T1, the control module 30 executes the startup and shutdown procedure, and controls the solid state hard disk 50 to reduce the read/write speed to the low-speed read/write value SP2, and continues for a first time t1. After the read/write speed of the solid state hard disk 50 decreases, it can be clearly found that the temperature of the solid state hard disk 50 continues to decrease. When the temperature drops to a second preset temperature T2, the control module 30 controls the solid state hard disk 50 to increase the read/write speed to the high-speed read/write value SP3, and continues for a second time t2, until the temperature of the solid state hard disk 50 rises to the first preset temperature T1 again.

In some embodiments, the read/write speed value includes a high-speed read/write value SP3 and a low-speed read/write value SP2, and the time includes a first time t1 and a second time t2, wherein the first time t1 corresponds to the low-speed read/write value SP2, and the second time t2 corresponds to the high-speed read/write value SP3. The estimation module 40 executes the estimation procedure and calculates the read/write speed estimation value according to the high-speed read/write value SP3, the low-speed read/write value SP2, the first time t1, and the second time t2. The calculation method is to use the average read/write speed value of the solid-state hard disk 50 as the read/write speed estimation value during the process of the control module 30 executing the startup and shutdown procedure. From the calculation in Figure 4, it can be understood that the size of the first area A1 and the second area A2 is calculated first, and then divided by the total time (the sum of the first time t1 and the second time t2) to obtain the average read/write speed value as the read/write speed estimate. Therefore, the estimation method is expressed in the formula shown in the following formula 1, where SE is the read/write speed estimate, SP2*t1 is the size of the first area A1, and SP3*t2 is the size of the second area A2.

It is also worth noting that Formula 1 estimates the estimated read/write speed after experiencing one temperature higher than the temperature interval value and one temperature lower than the temperature interval value. When the estimation is performed after multiple temperature higher than the temperature interval value and lower than the temperature interval value, the following Formula 2 is used by analogy, where SP4 is the low-speed read/write value, SP5 is the high-speed read/write value, t3 is the third time corresponding to the low-speed read/write value SP4, t4 is the fourth time corresponding to the high-speed read/write value SP5, and SP4 is the same or different from SP2, and SP5 is the same or different from SP3.

In some embodiments, the method of estimating the estimated value of the read/write speed is also based on the average read/write speed value, but the calculation process is slightly different from the above. As shown in Figure 4, the second area A2 includes a first sub-area A21 and a second sub-area A22. In this embodiment, only the second sub-area A22 is calculated, and then divided by the total time (the sum of the first time t1 and the second time t2), and finally the low-speed read/write value SP2 is added to obtain the average read/write speed value. The calculation formula is as follows: Formula 3, where (SP3-SP2)*t2 is the size of the second sub-area A22.

In some embodiments, in addition to the above two methods, the estimated reading and writing speed can also be estimated by using a weight value. The estimation module 40 executes the estimation program to calculate the estimated reading and writing speed according to the high-speed reading and writing value SP3, the low-speed reading and writing value SP2, the first time t1, the second time t2, the first weight value W1 and the second weight value W2. As shown in the following formulas 4 and 5:

After the estimation module 40 obtains the estimated value of the read/write speed, the control module 30 executes the control program and controls the read/write speed of the solid state drive 50 according to the estimated value of the read/write speed, so that the solid state drive 50 maintains working in a stable temperature range. In some embodiments, the control module 30 specifically controls the solid state drive 50 to reduce the read/write speed by adjusting one or more of the clock of the processor 52 in the solid state drive 50, the system clock of the solid state drive 50, the memory clock of the solid state drive 50 (such as NAND flash memory 56) or the memory size of the solid state drive 50 (such as static random access memory (SRAM) 58), so as to reduce the read/write speed of the solid state drive 50. As shown in FIG1 , the control module 30 mainly controls the clock adjustment method through the system bus 54. The port 51 shown in the figure is suitable for connecting the computer host 60 with information so that the computer host 60 can access data. In addition, the port 51 can be SATA (Serial Advanced Technology Attachment) or PCIe (Peripheral Component Interconnect Express).

Please refer to Figure 3. During the fifth time t5, when the control module 30 controls the read/write speed of the solid state hard disk 50 with the read/write speed estimate, it can be found that the solid state hard disk 50 maintains working at a stable temperature. At the end of the fifth time t5, the temperature of the solid state hard disk 50 drops sharply due to the influence of the external environment. At this time, the control module 30 will increase the read/write speed of the solid state hard disk 50, so that the temperature of the solid state hard disk 50 drops to a low point and then starts to reverse and rise (such as the sixth time t6). Since the temperature of the solid state hard disk 50 is disturbed, the control module 30 will re-execute the start/stop program and the control program, and the estimation module 40 will re-execute the estimation program to re-estimate the new read/write speed estimate to control the read/write speed of the solid state hard disk 50.

Please refer to FIG. 2 , the temperature control method of the solid state hard disk 50 in this case has the following steps:

Step S80: The control module 30 executes the start-stop procedure. When the temperature does not meet the temperature range value, the control module 30 adjusts the read and write speed of the solid state hard disk 50 and obtains the time and read and write speed values. In this step, please refer to the above content for how the control module 30 adjusts the read and write speed of the solid state hard disk 50, which will not be repeated here.

Step S82: The estimation module 40 performs an estimation procedure according to the read/write speed value and time to obtain an estimated read/write speed value. In this step, please refer to the above content for how the estimation module 40 obtains the estimated read/write speed value, which will not be repeated here.

Step S84: The control module 30 executes a control program according to the estimated read/write speed value to control the read/write speed of the solid state hard disk 50 to meet the estimated read/write speed value.

Step S86: When the temperature does not meet the temperature range value, re-execute step S80.

Although the technical content of this case has been disclosed as above through various embodiments, it is not used to limit the scope of protection of this case. Any changes or modifications made by anyone familiar with the field to which this case belongs without departing from the spirit of this case are within the scope of protection of this case. Therefore, the scope of protection of this case should be based on the content described in the scope of the patent application.

S80, S82, S84, S86: Steps

Claims (8)

A temperature control system for a solid state hard disk comprises: a detection module for detecting and obtaining a read/write speed value, a temperature, and a time, wherein the read/write speed value comprises a high-speed read/write value and a low-speed read/write value; the time comprises a first time corresponding to the high-speed read/write value and a second time corresponding to the low-speed read/write value; a control module having a start/stop program and a control program: the control module executes the start/stop program, and when the temperature does not meet a temperature range value, adjusts a read/write speed of a solid state hard disk; and the control module executes the control program to control the read/write speed of the solid state hard disk according to a read/write speed estimation value; and an estimation module, the estimation module having a first weight value corresponding to the high-speed read/write value and a second weight value corresponding to the low-speed read/write value. When the control module executes the start/stop program, the estimation module executes an estimation program to calculate the read/write speed estimation value according to the high-speed read/write value, the low-speed read/write value, the first time, the second time, the first weight value and the second weight value. The temperature control system of the solid state drive as described in claim 1, wherein the control module executes the control program to adjust at least one of the following groups according to the estimated read/write speed: the processor clock of the solid state drive, the system clock of the solid state drive, the memory clock of the solid state drive, and the memory size of the solid state drive. A temperature control system for a solid state hard disk includes: a detection module for detecting and obtaining a read/write speed value, a temperature, and a time, wherein the read/write speed value includes a high-speed read/write value and a low-speed read/write value; the time includes a first time corresponding to the high-speed read/write value and a second time corresponding to the low-speed read/write value; a control module having a start/stop program and a control program: the control module executes the start/stop program, and when the temperature does not meet a temperature range value, adjusts A read/write speed of a solid state hard disk; and the control module executes the control program to control the read/write speed of the solid state hard disk according to an estimated read/write speed value; and an estimation module, after the control module executes the start/stop program, the estimation module executes an estimation program to calculate a read/write speed difference value according to the high-speed read/write value and the low-speed read/write value, and calculates the estimated read/write speed value according to the low-speed read/write value, the read/write speed difference value, the first time, and the second time. The temperature control system of the solid state drive as described in claim 3, wherein the control module executes the control program to adjust at least one of the following groups according to the estimated read/write speed: the processor clock of the solid state drive, the system clock of the solid state drive, the memory clock of the solid state drive, and the memory size of the solid state drive. A temperature control method for a solid state hard disk is applicable to a solid state hard disk. The control method includes: continuously obtaining a read/write speed value, a temperature, and a time. The read/write speed value includes a high-speed read/write value and a low-speed read/write value. The high-speed read/write value corresponds to a first weight value, and the low-speed read/write value corresponds to a second weight value. The time includes a first time corresponding to the high-speed read/write value and a second time corresponding to the low-speed read/write value; Executing a start/stop procedure, When the temperature does not meet a temperature range value, the read/write speed of the solid state hard disk is adjusted, and the time and the read/write speed value are obtained; an estimation program is executed according to the high-speed read/write value, the low-speed read/write value, the first time, the second time, the first weight value and the second weight value to obtain a read/write speed estimation value; and a control program is executed according to the read/write speed estimation value to control the read/write speed of the solid state hard disk to meet the read/write speed estimation value. The temperature control method of the solid state drive as described in claim 5, wherein the control program is executed according to the estimated read/write speed to adjust at least one of the following groups: the processor clock of the solid state drive, the system clock of the solid state drive, the memory clock of the solid state drive, and the memory size of the solid state drive. A temperature control method for a solid state hard disk is applicable to a solid state hard disk. The control method includes: continuously obtaining a read/write speed value, a temperature, and a time, wherein the read/write speed value includes a high-speed read/write value and a low-speed read/write value, and the time includes a first time corresponding to the high-speed read/write value and a second time corresponding to the low-speed read/write value; executing a start/stop procedure, and when the temperature does not meet a temperature range value, adjusting the read/write speed of the solid state hard disk The method comprises: calculating a read/write speed, and obtaining the time and the read/write speed value; calculating a read/write speed difference value according to the high-speed read/write value and the low-speed read/write value, executing an estimation program according to the low-speed read/write value, the read/write speed difference value, the first time and the second time to obtain a read/write speed estimation value; and executing a control program according to the read/write speed estimation value to control the read/write speed of the solid state hard disk to meet the read/write speed estimation value. The temperature control method of the solid state drive as described in claim 7, wherein the control program is executed according to the estimated read/write speed to adjust at least one of the following groups: the processor clock of the solid state drive, the system clock of the solid state drive, the memory clock of the solid state drive, and the memory size of the solid state drive.

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