CN102156679A - PCIE interface-based solid state disk power-down protection method and device - Google Patents
PCIE interface-based solid state disk power-down protection method and device Download PDFInfo
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- 238000004146 energy storage Methods 0.000 claims description 8
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Abstract
The invention provides a PCIE interface-based solid state disk power-down protection method and a device, which judge whether the working state of a main power supply is normal working, normal shutdown or abnormal power-down by setting threshold voltages for the main power supply and a built-in static power supply and detecting in real time, start a standby power supply to supply power to a solid state disk only after confirming that the main power supply is abnormal power-down, and do not need to turn on the standby power supply to supply power when detecting that the main power supply is normal shutdown, thereby avoiding frequent charging and discharging of the standby power supply, saving electric energy and protecting the service life of the standby power supply.
Description
Technical field
The present invention relates to a kind of computing machine solid-state storage field, particularly a kind of power-off protection of solid state disk method and device based on the PCIE interface.
Background technology
Power down protection is meant when the normal power supply power supply power-fail, is the memory device power supply by standby power supply rapidly, can not lose in the data of a period of time internal memory devices guaranteeing, when primary power is replied power supply, automatically switches to the primary power power supply again.
For solid state hard disc; need the data of power down protection to write data often; the system that data is had high reliability request needs to use uninterrupted power source (Uninterruptible Power Supply detects UPS) to continue as system's power supply behind the primary power powered-off fault.For example, be the power supply of Memory Controller Hub and Nonvolatile memory by standby power supply behind the primary power powered-off fault, thereby avoid internal storage data to lose.
In the prior art, Chinese patent application 201010180476.X disclosure of the Invention a kind of power-off protection of solid state disk method and device, this method comprises: detect the solid state hard disc power down, and to switch to the energy storage device that sets in advance by working power be solid state hard disc power supply; During energy storage device was the solid state hard disc power supply, the data that solid state hard disc being is is being read and write were saved in hard disk; Detect working power and restore electricity, and to switch to working power by energy storage device be solid state hard disc power supply.
Chinese patent application number 200910091174.2 disclosure of the Invention another kind of power-off protection of solid state disk method, Apparatus and system, comprising: the self-discharge time of obtaining first super-capacitor module; When described self-discharge time during less than preset value, send second super capacitor and be discharged to charge-discharge circuit to connect the second super module discharge loop, be the solid state hard disc power supply by second super-capacitor module.
In the practical application, solid state hard disc is applied to the high speed accelerator card based on the PCIE interface usually, realizes high bandwidth and high IOPS(I/O per second, per second input and output number of times) performance.The PCIE standard interface includes the Standby power supply that meets the ATX power specifications.Under the normal operating conditions, be its power supply by the primary power that connects civil power, when normal shutdown, because civil power is normally exported, built-in static power source is enough to satisfy the requirement of solid state hard disc quiescent dissipation, is powered to it by the standby power supply; When powered-off fault, be that civil power is under the state of operate as normal, removed by force, the power down of primary power this moment along with removing of civil power, and the electric weight of built-in static power source storage itself is not enough to supply with dynamic solid state hard disc, need external standby power supply to continue to power, to finish remaining operation to solid state hard disc.
Prior art all adopts the energy storage device of super capacitor as described external standby power supply, but solid state hard disc normal shutdown and powered-off fault are not distinguished, this just causes each switching on and shutting down all can discharge and recharge super capacitor, can shorten the serviceable life of super capacitor so greatly; In addition, for power-off protection of solid state disk, the time of requirement so the time of power down protection should be adjustable, to save electric power resource, also can prolong the life-span of super capacitor simultaneously as long as enough the data in the solid state hard disc buffer memory are write among the flash.
Summary of the invention
Thereby the object of the invention provide a kind of avoid to the super capacitor of standby power supply repeatedly repeated charge prolong standby power supply the power-off protection of solid state disk method and the device based on the PCIE interface in serviceable life.
In order to achieve the above object; the technical solution adopted in the present invention is: a kind of power-off protection of solid state disk method based on the PCIE interface; described solid state hard disc is by primary power, built-in static power source and external standby power supply selectively power; described external standby power supply adopts super capacitor to carry out energy storage; it is characterized in that: this power-off protection method comprises
Step (a): to the default respectively threshold voltage that satisfies the solid state hard disc operate as normal of primary power, built-in static power source, be defined as primary power threshold voltage, static power source threshold voltage, and preset reference delay time, described benchmark delay time is defined as under normal shutdown, and built-in static power source is the time of solid state hard disc continued power;
Step (b): detect described primary power output voltage and built-in static power source output voltage in real time, and judge whether detected primary power output voltage is higher than default primary power threshold voltage, if, then main power voltage is normal, by primary power is the solid state hard disc power supply, and closes the output channel of described built-in static power source and external standby power supply; Otherwise, enter step (c);
Step (c): judge whether detected built-in static power source output voltage is higher than default static power source threshold voltage, if, then primary power is a normal shutdown, opens described built-in static power source output channel and thinks the solid state hard disc power supply, and close described external power supply output channel; If not, then primary power is a powered-off fault, enters step (d);
Step (d): open external standby power supply output channel and think the solid state hard disc power supply, and close described built-in static power source output channel, be higher than default primary power threshold voltage when detecting the primary power output voltage, then described primary power restores electricity, and switching to primary power by standby power supply is the solid state hard disc power supply.
To technique scheme in the mode further optimized, in the step (c), if detected built-in static power source output voltage continues to be higher than default static power source threshold voltage in default benchmark delay time, be to stop power supply behind the described benchmark delay time of solid state hard disc continued power then by built-in static power source; Be lower than default static power source threshold voltage if in default benchmark delay time, detect built-in static power source output voltage, be after the solid state hard disc power supply continues first delay time then via built-in static power source, stopped power supply behind continued power second delay time by external standby power supply, described first delay time and the second delay time sum equal the benchmark delay time again.
Described benchmark delay time is adjustable.
Described benchmark delay time scope is 2s～10s.
Described built-in static power source is the Standby power supply that meets the ATX power specifications.
The present invention also provides a kind of power-off protection of solid state disk device based on the PCIE interface; described solid state hard disc is by primary power, built-in static power source and external standby power supply selectively power; described external standby power supply adopts super capacitor to carry out energy storage, and this protective device comprises
Power Monitoring Unit, it is used for gathering respectively primary power output voltage and built-in static power source output voltage, and compare with primary power threshold voltage and the built-in static power source threshold voltage preset respectively, be operate as normal, normal shutdown or powered-off fault to judge described primary power duty;
The power supply handover module, it is connected between primary power, built-in static power source, external standby power supply and the solid state hard disc, and it has the input port that is connected with the Power Monitoring Unit output terminal, described power supply handover module is used to receive the control information of Power Monitoring Unit, with the supply access according to the duty switch mains power of primary power, built-in static power source, external standby power supply and solid state hard disc.
Optimally, also be connected with the time delayed turn-off module at described handover module output terminal, described time delayed turn-off module is used to control built-in static power source, external standby power supply is to stop power supply behind the solid state hard disc power supply Preset Time.
Also be provided with the anti-module of pouring in down a chimney that prevents that electric current from pouring in down a chimney on arbitrary supply access in described primary power and solid state hard disc, built-in static power source and solid state hard disc, external standby power supply.
The super capacitor of a described external standby power supply lithium battery in parallel is used for charging.
Described external standby power supply also is provided with and is used to detect the voltage detection module of super capacitor voltage swing to charge and to remind.
Owing to adopt technique scheme; the present invention has the following advantages: by primary power and built-in static power source being provided with threshold voltage and detecting in real time; thereby the duty that can judge primary power is operate as normal, normal shutdown or powered-off fault; after having only the primary power of affirmation powered-off fault; just enabling standby power supply powers to solid state hard disc; and ought detect primary power is normal shutdown; then need not to open standby power supply powers; thereby avoided standby power supply frequently to discharge and recharge; when having saved electric energy, protected the serviceable life of standby power supply.
Description of drawings
Accompanying drawing 1 be according to technical solution of the present invention the concrete power-off protection of solid state disk method flow diagram of implementing;
Accompanying drawing 2 be according to technical solution of the present invention the principle schematic of the concrete power-off protection of solid state disk device of implementing;
Accompanying drawing 3 be according to technical solution of the present invention the concrete external standby power supply principle schematic of implementing;
Embodiment
The invention provides a kind of power-off protection of solid state disk method and device,, technical scheme of the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, does not limit the present invention.
At first; with provide according to the present invention power-off protection of solid state disk method and technology scheme a concrete embodiment who implements; the object that present embodiment is faced is the solid state hard disc that is integrated in PCIE interface accelerator card; this solid state hard disc is usually by primary power, built-in static power source and standby power supply selectively power; wherein, described built-in static power source is the Standby power supply that meets ATX power specifications 2.1 versions and upgrade version.Fig. 1 has provided the concrete processing flow chart of present embodiment solid state hard disc guard method, and it comprises the steps:
Step 104 is the solid state hard disc power supply by primary power;
Step 108 behind the benchmark delay time of built-in static power source power supply delay adjustments, automatically shuts down, to save electric energy;
In the embodiment of the invention, the benchmark delay time is adjustable.Preferably, the benchmark delay time can be set in 2s～10s scope.
Above-mentioned for the optimization embodiment of power-off protection of solid state disk method of the present invention, according to said method, the present invention also provides a kind of power-off protection of solid state disk device, and Fig. 2 is the structural representation of the power-off protection of solid state disk device of present embodiment.It mainly comprises Power Monitoring Unit 20, power supply handover module 21 and time delayed turn-off module 22, will be elaborated to each functional module below:
Therefore, Power Monitoring Unit 20 can send and be used to control the control signal that primary power 10, built-in static power source 30, external standby power supply 40 are opened and closed.
Described control signal is received by power supply handover module 21, power supply handover module 21 of the present invention is connected between primary power 10, built-in static power source 30, external standby power supply 40 and the solid state hard disc 50, when Power Monitoring Unit 20 detects primary power 10 powered-off faults, power supply handover module 21 receives control signal, switch to by external standby power supply 40 and be solid state hard disc 50 power supplies, promptly purchase outside with forming path between power supply 40 and the solid state hard disc 50, simultaneously, between primary power 10 and solid state hard disc 50 and built-in static power source 30 and the solid state hard disc 50 for opening circuit; When Power Monitoring Unit 20 detects primary power 10 normal shutdowns, power supply handover module 21 receives control signal, switch to by built-in static power source 30 and be solid state hard disc 50 power supplies, promptly between built-in static power source 30 and solid state hard disc 50, form path, simultaneously, between primary power 10 and solid state hard disc 50 and external standby power supply 40 and solid state hard disc for opening circuit; When Power Monitoring Unit 20 detected primary power and restores electricity, power supply handover module 21 switched to once more between primary power 10 and the solid state hard disc 50 and forms path, continued as the solid state hard disc power supply by primary power 10.
Described time delayed turn-off module 22 is used for behind primary power normal shutdown and powered-off fault, make built-in static power source 30 and external standby power supply 40 after the time that sets in advance, automatically shut down, to save the electric energy of built-in static power source and external standby power supply for solid state hard disc 50 power supplies.
In the present embodiment, between primary power 10 and the solid state hard disc 50, between built-in static power source 30 and the solid state hard disc 50, also be respectively arranged with the anti-module 60 of pouring in down a chimney between external standby power supply 40 and the solid state hard disc 50, described anti-pouring in down a chimney when module 60 is used at primary power, built-in static power source, external standby power supply is a kind of is power supply prevents that electric current from pouring in down a chimney in other power supplys.
To the power-down protection apparatus course of work shown in Figure 2 be described below:
The at first default solid state hard disc of present embodiment power-off protection of solid state disk device can operate as normal primary power threshold voltage and built-in static power source threshold voltage, primary power 10 output voltages and built-in static power source 30 output voltages are subjected to the supervision of Power Monitoring Unit 20 simultaneously, and the signal of Power Monitoring Unit 20 outputs comprises primary power normal switch Continuity signal, primary power abnormal signal; Built-in static power source normal switch Continuity signal, the unusual Continuity signal of built-in static power source.When primary power 10 output voltages are higher than pre-set threshold voltage, Power Monitoring Unit 20 sends primary power normal switch Continuity signal, the path that power supply handover module 21 is opened between primary power and the solid state hard disc 50 is powered to solid state hard disc by primary power, close the path between built-in static power source 30 and solid state hard disc 50 and external standby power supply and the solid state hard disc 50, simultaneously, start that built-in static power source is anti-to pour in down a chimney module and external standby power supply is anti-pours in down a chimney module 60, prevent that the electric current of primary power from pouring in down a chimney into built-in static power source and standby power supply.
When the primary power normal shutdown, Power Monitoring Unit 20 detects the primary power output voltage and is lower than predefined voltage threshold, the output voltage of built-in static power source 30 is higher than predefined voltage threshold, Power Monitoring Unit 20 sends the primary power abnormal signal, built-in static power source normal switch Continuity signal, the path that power supply handover module 21 is opened between built-in static power source 30 and the solid state hard disc 50 is powered to solid state hard disc by built-in static power source, and close path between primary power 10 and solid state hard disc 50 and external standby power supply 40 and the solid state hard disc 50, simultaneously, start primary power and prevent pouring in down a chimney module and external standby power supply module 60, prevent that the electric current of built-in static power source from pouring in down a chimney into primary power and standby power supply.During normal shutdown, the electric energy of external standby power supply is in static state, and standby power supply does not consume any electric energy.
When the primary power powered-off fault, the voltage that Power Monitoring Unit 20 will detect primary power is lower than predefined voltage threshold, and the output voltage of built-in static power source is lower than predefined voltage threshold, Power Monitoring Unit 20 sends the unusual switch conduction signal of built-in static power source, the path that power supply handover module 21 is opened between external standby power supply 40 and the solid state hard disc 50 is powered to solid state hard disc by external standby power supply, and the path of closing between primary power 10 and solid state hard disc 50 and built-in static power source 30 and the solid state hard disc 50 is powered to solid state hard disc by external standby power supply, simultaneously, the startup primary power prevents pouring in down a chimney module and built-in static power source is prevented pouring in down a chimney module 60, prevents that the electric current of standby power supply from pouring in down a chimney into primary power and built-in static power source.
When primary power recovers, Power Monitoring Unit 20 detects the primary power output voltage and is higher than pre-set threshold voltage, Power Monitoring Unit 20 sends primary power normal switch Continuity signal, path between power supply handover module 21 conducting primary powers and the solid state hard disc is powered to solid state hard disc by primary power, prevents that simultaneously the electric current of primary power from pouring in down a chimney into built-in power and external standby power supply.
Fig. 3 has provided the schematic diagram of the external standby power supply of the present invention, and it is mainly in parallel with a lithium battery B1 by super capacitor C1, and when static, lithium battery B1 gives super capacitor C1 charging, and C1 is full of until super capacitor; During the standby power supply discharge, super capacitor C1 gives load discharge with big electric current, and super capacitor C1 can export big electric current moment.Standby power supply is the very little battery of internal resistance, and preferably, the internal resistance of cell is less than 50 milliohms.
Present embodiment also is provided with standby power supply detection module 70, and standby power supply detection module 70 is used to detect the voltage of standby power supply, and carries out alarm prompt by threshold voltage is set.
The present embodiment power-down protection apparatus is realized simple, and with low cost, energy-saving effect is obvious, has guaranteed that simultaneously the data of reading and writing can not lost when the solid state hard disc powered-off fault.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect have been carried out more detailed description; institute is understood that; the above only is specific embodiments of the invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. power-off protection of solid state disk method based on the PCIE interface; described solid state hard disc is by primary power, built-in static power source and external standby power supply selectively power; described external standby power supply adopts super capacitor to carry out energy storage, and it is characterized in that: this power-off protection method comprises
Step (a): to the default respectively threshold voltage that satisfies the solid state hard disc operate as normal of primary power, built-in static power source, be defined as primary power threshold voltage, static power source threshold voltage, and preset reference delay time, described benchmark delay time is defined as under normal shutdown, and built-in static power source is the time of solid state hard disc continued power;
Step (b): detect described primary power output voltage and built-in static power source output voltage in real time, and judge whether detected primary power output voltage is higher than default primary power threshold voltage, if, then main power voltage is normal, by primary power is the solid state hard disc power supply, and closes the output channel of described built-in static power source and external standby power supply; Otherwise, enter step (c);
Step (c): judge whether detected built-in static power source output voltage is higher than default static power source threshold voltage, if, then primary power is a normal shutdown, opens described built-in static power source output channel and thinks the solid state hard disc power supply, and close described external power supply output channel; If not, then primary power is a powered-off fault, enters step (d);
Step (d): open external standby power supply output channel and think the solid state hard disc power supply, and close described built-in static power source output channel, be higher than default primary power threshold voltage when detecting the primary power output voltage, then described primary power restores electricity, and switching to primary power by standby power supply is the solid state hard disc power supply.
2. the power-off protection of solid state disk method based on the PCIE interface according to claim 1, it is characterized in that: in the step (c), if detected built-in static power source output voltage continues to be higher than default static power source threshold voltage in default benchmark delay time, be to stop power supply behind the described benchmark delay time of solid state hard disc continued power then by built-in static power source; Be lower than default static power source threshold voltage if in default benchmark delay time, detect built-in static power source output voltage, be after the solid state hard disc power supply continues first delay time then via built-in static power source, stopped power supply behind continued power second delay time by external standby power supply, described first delay time and the second delay time sum equal the benchmark delay time again.
3. the power-off protection of solid state disk method based on the PCIE interface according to claim 2 is characterized in that: described benchmark delay time is adjustable.
4. the power-off protection of solid state disk method based on the PCIE interface according to claim 3 is characterized in that: described benchmark delay time scope is 2s～10s.
5. the power-off protection of solid state disk method based on the PCIE interface according to claim 1 is characterized in that: described built-in static power source is the Standby power supply that meets the ATX power specifications.
6. power-off protection of solid state disk device based on the PCIE interface; described solid state hard disc is by primary power, built-in static power source and external standby power supply selectively power; described external standby power supply adopts super capacitor to carry out energy storage, and it is characterized in that: this protective device comprises
Power Monitoring Unit, it is used for gathering respectively primary power output voltage and built-in static power source output voltage, and compare with primary power threshold voltage and the built-in static power source threshold voltage preset respectively, be operate as normal, normal shutdown or powered-off fault to judge described primary power duty;
The power supply handover module, it is connected between primary power, built-in static power source, external standby power supply and the solid state hard disc, and it has the input port that is connected with the Power Monitoring Unit output terminal, described power supply handover module is used to receive the control information of Power Monitoring Unit, with the supply access according to the duty switch mains power of primary power, built-in static power source, external standby power supply and solid state hard disc.
7. the power-off protection of solid state disk device based on the PCIE interface according to claim 6; it is characterized in that: also be connected with the time delayed turn-off module at described handover module output terminal, described time delayed turn-off module is used to control built-in static power source, external standby power supply is to stop power supply behind the solid state hard disc power supply Preset Time.
8. according to claim 6 or 7 described power-off protection of solid state disk devices, it is characterized in that: also be provided with the anti-module of pouring in down a chimney that prevents that electric current from pouring in down a chimney on the arbitrary supply access in described primary power and solid state hard disc, built-in static power source and solid state hard disc, external standby power supply based on the PCIE interface.
9. the power-off protection of solid state disk device based on the PCIE interface according to claim 6 is characterized in that: the super capacitor of a described external standby power supply lithium battery in parallel is used for charging.
10. the power-off protection of solid state disk device based on the PCIE interface according to claim 11 is characterized in that: described external standby power supply also is provided with and is used to detect the voltage detection module of super capacitor voltage swing to charge and to remind.
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