CN113867648A - Server storage subsystem and control method thereof - Google Patents
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- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0614—Improving the reliability of storage systems
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1448—Management of the data involved in backup or backup restore
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0653—Monitoring storage devices or systems
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0683—Plurality of storage devices
- G06F3/0689—Disk arrays, e.g. RAID, JBOD
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Abstract
The application discloses server storage subsystem includes: the system redundancy is improved by arranging the first RAID controller, the second RAID controller, the first expansion chip, the second expansion chip and the plurality of hard disk connectors, and the single faults of any one controller, any one expansion chip, any one hard disk connector and any one hard disk or even any one link can not affect the data transmission between the CPU and the hard disk, so that the data safety is ensured, and the availability requirement of the server for not being crashed is met. Correspondingly, the application also discloses a control method of the server storage subsystem, which has the same technical effect as the server storage subsystem.
Description
Technical Field
The invention relates to the field of server storage systems, in particular to a server storage subsystem and a control method thereof.
Background
In the information era of the current vigorous development, various industries have a large amount of data storage requirements, and server users continuously put higher requirements on the safety of data storage on the server. How to ensure the reliable operation of the server and the reliability and safety of data on the server is a key problem to be solved in the field of servers. A server usually attaches a plurality of hard Disks to a RAID (Redundant Array of Independent Disks) controller to improve the data security level of a server storage subsystem, and when data is accidentally lost, it is ensured as much as possible that the server continues to operate normally and the lost data is recovered as much as possible. The RAID technology has a good data protection effect when a single hard disk in the server fails, but the design of the server is more and more complex, and once other links on a data storage link fail, the data on the server cannot be ensured to be safe and the availability requirement of the server for not going down cannot be met only by hanging a plurality of hard disks by the single RAID.
Therefore, how to provide a solution to the above technical problems is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a server storage subsystem with higher redundancy and further improved data security, and a control method thereof. The specific scheme is as follows:
a server storage subsystem comprising: CPU, first RAID controller, second RAID controller, first expansion chip, second expansion chip, a plurality of hard disk connectors, wherein:
the first ports of the first RAID controller are connected with the CPU, and the second port of the first RAID controller is connected with the uplink port of the first expansion chip and the uplink port of the second expansion chip;
the first ports of the second RAID controller are connected with the CPU, and the second port of the second RAID controller is connected with the uplink port of the first expansion chip and the uplink port of the second expansion chip;
a plurality of downlink ports of the first expansion chip are respectively connected with first ports of a plurality of hard disk connectors one by one, and a plurality of downlink ports of the second expansion chip are respectively connected with second ports of the plurality of hard disk connectors one by one;
and the output port of each hard disk connector is used for connecting a hard disk.
Preferably, the server storage subsystem includes one of the CPUs, and the first RAID controller and the second RAID controller are connected to synchronize operation data.
Preferably, the server storage subsystem includes 2 CPUs interconnected with data, specifically, a first CPU and a second CPU, where the first RAID controller is connected to the first CPU, and the second RAID controller is connected to the second CPU.
Preferably, the first RAID controller and the second RAID controller are connected to achieve synchronization of operation data.
Correspondingly, the application also discloses a control method of the server storage subsystem, which is applied to any one of the server storage subsystems, and the control method comprises the following steps:
monitoring the running states of all RAID controllers; the RAID controller comprises a first RAID controller and a second RAID controller;
and if the running state of one RAID controller is abnormal and the running state of the other RAID controller is normal, transferring all task data to the RAID controller with the normal running state so as to enable the RAID controller to execute all tasks.
Preferably, before monitoring the operating states of all RAID controllers, the method further includes:
acquiring the in-place states of the connecting cables of all the RAID controllers, the first expansion chip and the second expansion chip;
and determining the data transmission paths of all the hard disk connectors according to the in-place state.
Preferably, the control method further includes:
monitoring a power supply good signal and an on-site signal of a power supply module of the server storage subsystem;
judging whether the running state of the power supply module is normal or not according to the power supply good signal and the in-place signal;
and if not, enabling all the RAID controllers to start a power failure protection mechanism.
Preferably, the process of monitoring the power supply good signal and the on-site signal of the power supply module of the server storage subsystem includes:
monitoring power supply good signals and in-place signals of all power supply modules of the server storage subsystem;
correspondingly, the process of determining whether the operation state of the power supply module is normal according to the power supply good signal and the in-place signal includes:
judging whether the running states of all the power supply modules are normal or not according to the power supply good signal and the in-place signal;
and if the running states of all the power supply modules are abnormal, enabling all the RAID controllers to start a power failure protection mechanism.
Preferably, the process of monitoring the power supply good signal and the on-site signal of the power supply module of the server storage subsystem includes:
monitoring a power supply good signal and an on-site signal of a power supply module of the server storage subsystem through a CPLD;
the process of judging whether the running state of the power supply module is normal or not according to the power supply good signal and the in-place signal comprises the following steps:
judging whether the running state of the power supply module is normal or not according to the power supply good signal and the in-place signal through the CPLD;
if not, enabling all the RAID controllers to start a power failure protection mechanism through the CPLD.
The application discloses server storage subsystem includes: the system redundancy is improved by arranging the first RAID controller, the second RAID controller, the first expansion chip, the second expansion chip and the plurality of hard disk connectors, and the single faults of any one controller, any one expansion chip, any one hard disk connector and any one hard disk or even any one link can not affect the data transmission between the CPU and the hard disk, so that the data safety is ensured, and the availability requirement of the server for not being crashed is met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a block diagram of a server storage subsystem according to an embodiment of the present invention;
FIG. 2 is a block diagram of a server storage subsystem according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating steps of a method for controlling a server storage subsystem according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Currently, a server usually connects a plurality of hard disks to a RAID controller to improve the data security level of a server storage subsystem, and when data is accidentally lost, the server is guaranteed to continue to operate normally as much as possible and the lost data is recovered as much as possible. The RAID technology has a good data protection effect when a single hard disk in the server fails, but the design of the server is more and more complex, and once other links on a data storage link fail, the data on the server cannot be ensured to be safe and the availability requirement of the server for not going down cannot be met only by hanging a plurality of hard disks by the single RAID.
The application discloses server storage subsystem includes: the system comprises a Central Processing Unit (CPU), a first RAID controller, a second RAID controller, a first expansion chip, a second expansion chip and a plurality of hard disk connectors, wherein the first RAID controller, the second RAID controller, the first expansion chip, the second expansion chip and other elements are connected, the redundancy of the system is improved, and the data transmission between the CPU and the hard disk cannot be influenced by single faults of any one controller, any expansion chip, the hard disk connectors, the hard disk and even a link, so that the data safety is ensured, and the availability requirement of a server for not being down is met.
The embodiment of the invention discloses a server storage subsystem, which is shown in figure 1 and comprises the following components: CPU, first RAID controller, second RAID controller, first expansion chip, second expansion chip, a plurality of hard disk connectors, wherein:
the first ports of the first RAID controller are connected with the CPU, and the second port of the first RAID controller is connected with the uplink port of the first expansion chip and the uplink port of the second expansion chip;
the first ports of the second RAID controller are connected with the CPU, and the second port of the second RAID controller is connected with the uplink port of the first expansion chip and the uplink port of the second expansion chip;
a plurality of downlink ports of the first expansion chip are respectively connected with first ports of a plurality of hard disk connectors one by one, and a plurality of downlink ports of the second expansion chip are respectively connected with second ports of the plurality of hard disk connectors one by one;
the output port of each hard disk connector is used for connecting a hard disk.
It can be understood that, through the connection between the units in this embodiment, the redundancy of the RAID controller, the expansion chip, the data link, and the hard disk data can be ensured, and in the entire transmission system of the CPU-RAID controller-expansion chip-hard disk connector, a plurality of units are provided on each transmission layer to be mutually hot standby.
In order to improve the data synchronization hot standby efficiency in this embodiment, besides the CPU synchronizes the data of the first RAID controller and the second RAID controller that are downstream from the CPU, when the system includes one CPU, the first RAID controller and the second RAID controller may be connected to implement synchronization of the operation data.
Further, the server storage subsystem may include more than one CPU, as shown in fig. 2, when the server storage subsystem includes 2 CPUs interconnected by data, specifically, a first CPU and a second CPU, where the first RAID controller is connected to the first CPU, and the second RAID controller is connected to the second CPU. Furthermore, the first RAID controller and the second RAID controller can be connected to realize the synchronization of the operation data.
It is understood that, in actual installation, the CPU, the first RAID controller and the second RAID controller are generally arranged on a hard disk motherboard, the first expansion chip, the second expansion chip and a plurality of hard disk connectors are arranged on a hard disk backplane, and the RAID controller and the expansion chip are connected between the hard disk motherboard and the hard disk backplane by using an SAS (Serial Attached SCSI) connector.
During specific wiring, the CPUs can select CC bus interconnection; the CPU and the two RAID controllers are interconnected through PCIe x8 signals, the first RAID controller and the second RAID controller can select a board-mounted controller and can also select PCIe (peripheral component interconnect express, latest bus and interface standard) card-inserting type, when the RAID controller is the PCIe card-inserting type, the RAID controller is connected with a PCIe x16 slot on the mainboard through a PCIe x16 golden finger, the PCIe x16 connector is connected with the CPU through PCIe x8 signals, and in addition, the two RAID controllers are connected through 8 SAS signals; further, the low-speed control signals connected between the RAID controllers may also include I2C signals and fault alarm signals, which may be transmitted through RSVD pins on the PCIe x16 connector.
Furthermore, two expansion chips, namely SAS expander chips, on the hard disk backplane include a first expansion chip and a second expansion chip, each expansion chip has 8 uplink SAS ports, wherein 4 SAS ports are connected with a first RAID controller on the motherboard through SAS connectors, and the other 4 SAS ports are connected with a second RAID controller on the motherboard; each expansion chip is provided with 8 downlink SAS ports, wherein the 8 SAS ports of the first expansion chip are respectively connected with the first ports of the 8 hard disk connectors, and the 8 SAS ports of the second expansion chip are respectively connected with the second ports of the 8 hard disk connectors.
When the CPU reads and writes data to the hard disk, the data can be read and written through any one RAID controller, and the two RAID controllers are in active states without being divided into master/slave states. Taking fig. 2 as an example, when the first CPU reads and writes data from and to the hard disk through the first RAID controller, the first RAID controller may also send the read and write data to the second RAID controller in real time through an SAS signal. Similarly, when the second CPU reads and writes data from and to the hard disk via the second RAID controller, the second RAID controller may also send the read and write data to the first RAID controller in real time via an SAS signal. The control signal is used for communicating the state of the register and the health state between the two RAID controllers, and when one RAID controller is abnormal, the other RAID controller takes over the task of reading and writing the hard disk. Because the hard disk data between the two RAID controllers are kept synchronous in real time, dynamic switching can be realized when tasks are transferred, the possibility of data loss or data retransmission is reduced, the operation of shutdown maintenance of a server due to the abnormal RAID controllers is avoided, and the availability of a server system is improved.
Data transmission between the RAID controller and the expansion chip can be realized through 4 groups of cables and connectors of MiniSAS HD x4, each group of MiniSAS HD x4 cables and connectors can transmit 4 groups of SAS differential signals and a Sideband signal, and the Sideband signal comprises an I2C signal and a cable in-place detection signal. The I2C signal is used for the RAID controller to control the status indicator light of the hard disk, the RAID controller sends a control command to the expansion chip through the I2C, and the expansion chip decodes the I2C signal and controls the status indicator light of the corresponding hard disk. The cable is pulled up to a high level on the mainboard by the in-place detection signal, is pulled up to a low level on the hard disk backboard, plays a role in communication, and can detect the low and effective in-place state of the cable by a Baseboard Management Controller (BMC) on the mainboard after the cable is communicated, and the signal is high if the cable is not successfully installed. The BMC can detect the in-place states of the four groups of cables each time the system is started so as to ensure the redundancy of the SAS link of the storage subsystem.
Besides being connected through SAS cables, the main board and the hard disk back plate are generally provided with a power supply cable and a hard disk back plate control signal cable, the power supply cable is used for supplying power to the hard disk back plate and the hard disk, and the hard disk back plate control signal cable is used for detecting the power supply state of the hard disk back plate, managing the health state and the like.
The application discloses server storage subsystem includes: the system redundancy is improved by arranging the first RAID controller, the second RAID controller, the first expansion chip, the second expansion chip and the plurality of hard disk connectors, and the single faults of any one controller, any one expansion chip, any one hard disk connector and any one hard disk or even any one link can not affect the data transmission between the CPU and the hard disk, so that the data safety is ensured, and the availability requirement of the server for not being crashed is met.
Correspondingly, an embodiment of the present application further discloses a control method for a server storage subsystem, which is applied to any one of the above server storage subsystems, and as shown in fig. 3, the control method includes:
s1: monitoring the running states of all RAID controllers; the RAID controller comprises a first RAID controller and a second RAID controller;
s2: if the running state of one RAID controller is abnormal and the running state of the other RAID controller is normal, all task data are transferred to the RAID controller with the normal running state, so that the RAID controller executes all tasks.
Further, before monitoring the operating status of all RAID controllers in consideration of the wiring between the motherboard and the backplane, the method may further include:
acquiring the in-place states of connecting cables of all the RAID controllers and the first expansion chip and the second expansion chip;
and determining the data transmission paths of all the hard disk connectors according to the on-position state.
Further, in order to further improve the data security of the storage subsystem in this embodiment, this embodiment further sets the data protection of the power down of the power supply module, and by obtaining the operating state of the power supply module in advance, and using the power down protection function of the RAID controller, reduces the data loss caused by the unexpected power down of the server, and the control method further includes:
monitoring a power supply good signal and an on-site signal of a power supply module of a server storage subsystem;
judging whether the running state of the power supply module is normal or not according to the power supply good signal and the on-site signal;
if not, enabling all RAID controllers to start a power failure protection mechanism.
Further, the process of monitoring the power supply good signal and the on-site signal of the power supply module of the server storage subsystem in consideration of the standby condition of the power supply module includes:
monitoring power supply good signals and in-place signals of all power supply modules of a server storage subsystem;
correspondingly, the process of judging whether the running state of the power supply module is normal or not according to the power supply good signal and the in-place signal comprises the following steps:
judging whether the running states of all power supply modules are normal or not according to the power supply good signal and the on-site signal;
and if the running states of all the power supply modules are abnormal, enabling all the RAID controllers to start a power failure protection mechanism.
Specifically, as to whether the power supply good signals of the power supply modules and the in-place signals correspond to start of logic control of the power failure protection mechanism, the logic control may be as shown in table 1 below, where the power supply good signals of the two power supply modules are PG _1 and PG _2, respectively, the in-place signals are PRSNT _ N _1 and PRSNT _ N _2, respectively, the enable signal for the RAID controller to start the power failure protection mechanism is EPOW _ N, and the enable signals of the two RAID controllers with the same power supply module are the same.
TABLE 1 Power supply Module and RAID controller Enabled Signal logic relationship
| PRSNT_N_1 | PG_1 | PRSNT_N_2 | PG_2 | EPOW_N |
| 0 | 1 | 0 | X | 1 |
| 0 | X | 0 | 1 | 1 |
| 0 | 0 | 0 | 0 | 0 |
| 1 | X | 0 | 1 | 1 |
| 1 | X | 0 | 0 | 0 |
| 0 | 1 | 1 | X | 1 |
| 0 | 0 | 1 | X | 0 |
| 1 | X | 1 | X | 0 |
When EPOW _ N is in high level, the RAID controller works normally, when EPOW _ N is in low level, the RAID controller starts emergency storage, and the current state of the system is stored to prepare for being met with the upcoming endpoint.
Further, the method for protecting the data from power failure in this embodiment is implemented by a CPLD, and the process of monitoring the power supply good signal and the on-site signal of the power supply module of the server storage subsystem includes:
monitoring power supply good signals and in-place signals of a power supply module of a server storage subsystem through a CPLD;
the process of judging whether the running state of the power supply module is normal or not according to the power supply good signal and the on-site signal comprises the following steps:
judging whether the running state of the power supply module is normal or not according to the power supply good signal and the on-site signal through the CPLD;
if not, enabling all RAID controllers to start a power failure protection mechanism through the CPLD.
The embodiment provides a highly available and highly redundant server storage subsystem aiming at the problems of data loss and system downtime caused by hardware link failure in the prior art, ensures real-time redundant backup of data through full link redundancy design and a redundant RAID controller real-time backup technology, and has the capability of real-time switching when any one of the links fails.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The server storage subsystem and the control method thereof provided by the present invention are described in detail above, and a specific example is applied in the description to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (9)
1. A server storage subsystem, comprising: CPU, first RAID controller, second RAID controller, first expansion chip, second expansion chip, a plurality of hard disk connectors, wherein:
the first ports of the first RAID controller are connected with the CPU, and the second port of the first RAID controller is connected with the uplink port of the first expansion chip and the uplink port of the second expansion chip;
the first ports of the second RAID controller are connected with the CPU, and the second port of the second RAID controller is connected with the uplink port of the first expansion chip and the uplink port of the second expansion chip;
a plurality of downlink ports of the first expansion chip are respectively connected with first ports of a plurality of hard disk connectors one by one, and a plurality of downlink ports of the second expansion chip are respectively connected with second ports of the plurality of hard disk connectors one by one;
and the output port of each hard disk connector is used for connecting a hard disk.
2. The server storage subsystem of claim 1, comprising one said CPU, said first RAID controller and said second RAID controller coupled to achieve synchronization of operational data.
3. The server storage subsystem of claim 1, comprising 2 data interconnected CPUs, in particular a first CPU and a second CPU, wherein the first RAID controller is connected to the first CPU and the second RAID controller is connected to the second CPU.
4. The server storage subsystem of claim 3, wherein the first RAID controller and the second RAID controller are coupled to enable synchronization of operational data.
5. A control method of a server storage subsystem, applied to the server storage subsystem of any one of claims 1 to 4, the control method comprising:
monitoring the running states of all RAID controllers; the RAID controller comprises a first RAID controller and a second RAID controller;
and if the running state of one RAID controller is abnormal and the running state of the other RAID controller is normal, transferring all task data to the RAID controller with the normal running state so as to enable the RAID controller to execute all tasks.
6. The method of claim 5, wherein prior to monitoring the operational status of all RAID controllers, further comprising:
acquiring the in-place states of the connecting cables of all the RAID controllers, the first expansion chip and the second expansion chip;
and determining the data transmission paths of all the hard disk connectors according to the in-place state.
7. The control method according to claim 5, characterized by further comprising:
monitoring a power supply good signal and an on-site signal of a power supply module of the server storage subsystem;
judging whether the running state of the power supply module is normal or not according to the power supply good signal and the in-place signal;
and if not, enabling all the RAID controllers to start a power failure protection mechanism.
8. The method of claim 7, wherein the monitoring power good signals and power in place signals of the power modules of the server storage subsystem comprises:
monitoring power supply good signals and in-place signals of all power supply modules of the server storage subsystem;
correspondingly, the process of determining whether the operation state of the power supply module is normal according to the power supply good signal and the in-place signal includes:
judging whether the running states of all the power supply modules are normal or not according to the power supply good signal and the in-place signal;
and if the running states of all the power supply modules are abnormal, enabling all the RAID controllers to start a power failure protection mechanism.
9. The method of claim 7, wherein the monitoring power good signals and power in place signals of the power modules of the server storage subsystem comprises:
monitoring a power supply good signal and an on-site signal of a power supply module of the server storage subsystem through a CPLD;
the process of judging whether the running state of the power supply module is normal or not according to the power supply good signal and the in-place signal comprises the following steps:
judging whether the running state of the power supply module is normal or not according to the power supply good signal and the in-place signal through the CPLD;
if not, enabling all the RAID controllers to start a power failure protection mechanism through the CPLD.
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| CN202111199036.3A CN113867648B (en) | 2021-10-14 | 2021-10-14 | Server storage subsystem and control method thereof |
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| CN202111199036.3A CN113867648B (en) | 2021-10-14 | 2021-10-14 | Server storage subsystem and control method thereof |
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| CN113867648B CN113867648B (en) | 2023-12-29 |
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