CN108491052B - Self-recovery method for hot plug fan - Google Patents
Self-recovery method for hot plug fan Download PDFInfo
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- CN108491052B CN108491052B CN201810283310.7A CN201810283310A CN108491052B CN 108491052 B CN108491052 B CN 108491052B CN 201810283310 A CN201810283310 A CN 201810283310A CN 108491052 B CN108491052 B CN 108491052B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000011084 recovery Methods 0.000 title abstract description 3
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
- G06F1/305—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations in the event of power-supply fluctuations
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Computer Hardware Design (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention provides a method for self-recovery of a hot-plug fan, belonging to the technical field of hot-plug, wherein the fan is powered on after being plugged by EFUSE in the hot-plug process of the fan, so that the problem of current overshoot in the hot-plug process of the fan is effectively avoided. The invention can effectively protect the operation of hot plug of the fan of the server system and improve the stability of the server.
Description
Technical Field
The invention relates to a hot plugging technology, in particular to a method for self-recovering a hot plugging fan.
Background
At present, in the field of servers, although heat resistance of each module in the server is greatly improved, air cooling for key components by using a fan is an indispensable link in the server. When the server normally works, the system detects the temperature of the position at that time according to each temperature detection chip in the server to adjust the rotating speed. Server fans generally all support redundancy, need the hot plug fan to carry out new fan replacement under the condition of fan body trouble, in order to prevent that fan current is too big, generally can add efuse at the fan power supply end and protect, this efuse can break off fan power supply under the too big condition of fan pump load current to prevent entire system's trouble. When the fan normally works, the current is kept at a stable value, but when the fan is hot plugged, the current of the fan is multiplied to cause the efuse to trigger protection, and the work of the fan is stopped, so that the system lacks one fan, and the reliability of the system is greatly reduced. Therefore, the technical problem to be solved at present is to ensure the fan to continuously work in the process of hot plugging the fan. .
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for self-recovering a hot plug fan. Under the severe condition of heat dissipation condition, need to change the fan, when the fan is changed in the hot plug, guarantee that new fan if lead to its electric current to trigger the efuse protection circuit and under the condition that can not normally work at the plug process, make efuse open again, make the fan normally work.
The technical scheme of the invention is as follows:
a method for self-recovering a hot-plug fan,
the method comprises the following steps that EFUSE is used as a protection chip of a fan circuit, a CPLD is used as a control chip, the CPLD controls the opening and closing of the EFUSE, and in-situ information and rotating speed information of a fan are detected; P12V supplies power for external power supply; P12V _ FAN is a power supply of the FAN passing through the EFUSE, FAN _ CONN is a FAN connector, EFUSE _ EN is a switching signal of a FAN circuit protection chip, the EFUSE is opened at a high level, and the EFUSE is turned off at a low level; the FAN _ TECH signal is a FAN speed output signal.
When the FAN starts to rotate, the FAN _ TECH signal changes from high to low, otherwise, the FAN _ TECH signal is always at a low level; the FAN _ PRSNT signal is a FAN on-position signal, when the FAN is on position, the signal is low, and when the FAN is not on position, the signal is high; the OUTPUT signal OUTPUTs information to the system for the CPLD.
Firstly, under the condition that a server is normally started, CPLD opens respective FAN EFUSE by judging the in-place condition of the FAN and changing the EFUSE _ EN signal into high level, so that the FAN starts to be started after being normally powered, and normal working information of the FAN is output to a system after detecting the change of a FAN rotating speed signal FAN _ TECH;
when the FAN fails, the CPLD detects that the rotating speed of the FAN is 0, the EFUSE _ EN signal is changed from the high level to the low level for a period of time and then is pulled to the high level, the EFUSE is opened again, and at the moment, if the FAN _ TECH is not changed yet, the CPLD outputs a FAN failure signal to a system and the FAN needs to be replaced;
when the FAN is replaced, the CPLD detects that the in-place signal of the FAN is changed into high level, which indicates that the FAN is not in place, so that the EFUSE _ EN signal is changed into low level, the EFUSE of the FAN is closed, after a new FAN is inserted, the in-place signal is pulled down again, the CPLD opens the EFUSE by pulling up the EFUSE _ EN signal at the moment to supply power to the FAN, and normal work information of the FAN is output to the system after the FAN _ TECH is detected to be changed.
If the FAN _ TECH is not detected to be changed after the signal EFUSE _ EN is pulled up, the CPLD can pull up the signal EFUSE _ EN again after time delay, secondary electrification is realized, and the existence of overshoot current in the plugging and unplugging process of the filter FAN is ensured.
The invention has the advantages that
The stability of the server fan can be improved, the hot plug function of the fan is enhanced, and the reliability of the system is improved.
Drawings
FIG. 1 is a block diagram of the system architecture of the present invention.
Detailed Description
The invention is explained in more detail below:
the invention mainly utilizes CPLD to judge the operation of fan hot plug process, fan speed detection and fan starting. The EFUSE is a protection chip of the fan circuit, the CPLD is a control chip, and the control chip mainly controls the opening and the closing of the EFUSE and detects the in-place information and the rotating speed information of the fan. P12V provides power for an external power source. The FAN circuit protection chip comprises a P12V _ FAN, a FAN _ CONN, a FAN connector, an EFUSE _ EN, a FAN circuit protection chip and a FAN _ TECH signal, wherein the P12V _ FAN is a power supply of the FAN after passing through the EFUSE, the FAN _ CONN is a FAN connector, the EFUSE _ EN is a switch signal of the FAN circuit protection chip, the EFUSE is switched on at a high level, the EFUSE is switched off at a low level, the FAN _ TECH signal is a FAN rotating speed output signal, when the FAN starts. The FAN _ PRSNT signal is a FAN on bit signal, which is low when the FAN is on bit and high when the FAN is not on bit. The OUTPUT signal OUTPUTs information to the system for the CPLD.
Firstly, under the condition that a server is normally started, CPLD turns on respective FAN EFUSE by judging the in-place condition of the FAN and changing the EFUSE _ EN signal into high level, so that the FAN starts to be started after being normally powered, and normal work information of the FAN is output to a system after detecting the change of a FAN rotating speed signal FAN _ TECH. When the FAN is out of order, the CPLD detects that the rotating speed of the FAN is 0, the EFUSE _ EN signal is changed from the high level to the low level for a period of time and then is pulled to the high level, the EFUSE is turned on again, and at the moment, if the FAN _ TECH is not changed yet, the CPLD outputs a FAN failure signal to the system and the FAN needs to be replaced. When the FAN is replaced, the CPLD detects that the in-place signal of the FAN is changed into high level, which indicates that the FAN is not in place, so that the EFUSE _ EN signal is changed into low level, the EFUSE of the FAN is closed, after a new FAN is inserted, the in-place signal is pulled down again, the CPLD opens the EFUSE by pulling up the EFUSE _ EN signal at the moment, power is supplied to the FAN, and normal work information of the FAN is output to the system after the FAN _ TECH is detected to be changed. If the FAN _ TECH is not detected to be changed after the signal EFUSE _ EN is pulled up, the CPLD can pull up the signal EFUSE _ EN again after delaying for a period of time, secondary electrification is realized, and the existence of overshoot current in the plugging and unplugging process of the filter FAN is ensured.
Therefore, the invention can effectively protect the operation of hot plug of the fan of the server system and improve the stability of the server.
Claims (2)
1. A method for self-recovering a hot-plug fan,
the method comprises the following steps that EFUSE is used as a protection chip of a fan circuit, a CPLD is used as a control chip, the CPLD controls the opening and closing of the EFUSE, and in-situ information and rotating speed information of a fan are detected; P12V supplies power for external power supply; P12V _ FAN is a power supply of the FAN passing through the EFUSE, FAN _ CONN is a FAN connector, EFUSE _ EN is a switching signal of a FAN circuit protection chip, the EFUSE is opened at a high level, and the EFUSE is turned off at a low level; FAN _ TECH signal is FAN speed output signal;
when the FAN starts to rotate, the FAN _ TECH signal changes from high to low, otherwise, the FAN _ TECH signal is always at a low level; the FAN _ PRSNT signal is a FAN on-position signal, when the FAN is on position, the signal is low, and when the FAN is not on position, the signal is high; the OUTPUT signal is CPLD OUTPUT information to the system; it is characterized in that the preparation method is characterized in that,
firstly, under the condition that a server is normally started, a CPLD opens respective FANs EFUSE by judging the in-place condition of the FANs and changing EFUSE _ EN signals into high level, so that the FANs start to be started after being normally powered, and normal working information of the FANs is output to a system after detecting that FAN rotating speed signals FAN _ TECH are changed;
when the FAN fails, the CPLD detects that the rotating speed of the FAN is 0, the EFUSE _ EN signal is changed from the high level to the low level for a period of time and then is pulled to the high level, the EFUSE is opened again, and at the moment, if the FAN _ TECH is not changed yet, the CPLD outputs a FAN failure signal to a system and the FAN needs to be replaced;
when the FAN is replaced, the CPLD detects that the in-place signal of the FAN is changed into high level, which indicates that the FAN is not in place, so that the EFUSE _ EN signal is changed into low level, the EFUSE of the FAN is closed, after a new FAN is inserted, the in-place signal is pulled down again, the CPLD opens the EFUSE by pulling up the EFUSE _ EN signal at the moment to supply power to the FAN, and normal work information of the FAN is output to the system after the FAN _ TECH is detected to be changed.
2. The method of claim 1,
if the FAN _ TECH is not detected to be changed after the signal EFUSE _ EN is pulled up, the CPLD can pull up the signal EFUSE _ EN again after time delay, secondary electrification is realized, and the existence of overshoot current in the plugging and unplugging process of the filter FAN is ensured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810283310.7A CN108491052B (en) | 2018-04-02 | 2018-04-02 | Self-recovery method for hot plug fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810283310.7A CN108491052B (en) | 2018-04-02 | 2018-04-02 | Self-recovery method for hot plug fan |
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| CN108491052A CN108491052A (en) | 2018-09-04 |
| CN108491052B true CN108491052B (en) | 2020-03-17 |
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| CN201810283310.7A Active CN108491052B (en) | 2018-04-02 | 2018-04-02 | Self-recovery method for hot plug fan |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109253104A (en) * | 2018-09-17 | 2019-01-22 | 郑州云海信息技术有限公司 | A kind of equipment, method and system controlling fan |
| CN109611368A (en) * | 2018-12-13 | 2019-04-12 | 浪潮(北京)电子信息产业有限公司 | A kind of fan control system for storage system, method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104391556A (en) * | 2014-11-13 | 2015-03-04 | 英业达科技有限公司 | Power supply protection device and method |
| CN105528044A (en) * | 2015-12-09 | 2016-04-27 | 浪潮电子信息产业股份有限公司 | Method for realizing easy plugging of fan board module based on blade server |
| CN206773636U (en) * | 2017-06-09 | 2017-12-19 | 郑州云海信息技术有限公司 | A kind of excessively stream self- recoverage fan back board structure |
| CN107656852A (en) * | 2017-10-24 | 2018-02-02 | 郑州云海信息技术有限公司 | A kind of server multi-fan detecting fault control device and control method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200720901A (en) * | 2005-11-16 | 2007-06-01 | Inventec Corp | Method for reducing instantaneous current on startup |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391556A (en) * | 2014-11-13 | 2015-03-04 | 英业达科技有限公司 | Power supply protection device and method |
| CN105528044A (en) * | 2015-12-09 | 2016-04-27 | 浪潮电子信息产业股份有限公司 | Method for realizing easy plugging of fan board module based on blade server |
| CN206773636U (en) * | 2017-06-09 | 2017-12-19 | 郑州云海信息技术有限公司 | A kind of excessively stream self- recoverage fan back board structure |
| CN107656852A (en) * | 2017-10-24 | 2018-02-02 | 郑州云海信息技术有限公司 | A kind of server multi-fan detecting fault control device and control method |
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| CN108491052A (en) | 2018-09-04 |
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