TWI437427B - System, method, and computer program product for providing data redundancy in a plurality of storage devices - Google Patents

Description

System, method and computer program product for providing data redundancy in multiple storage devices

This invention relates to data storage devices, and more particularly to data redundancy in storage devices.

The storage system is one of the most restricted aspects of the performance of modern enterprise computer computing systems. The performance of hard disk storage is determined by the search time and the half rotation time. Performance can be increased by reducing seek time and reducing spin delay. However, the hard disk speed is still limited, and the current hard disk speed can reach 15,000 rpm.

Figure 1 illustrates a system 100 in accordance with the prior art. In system 100, at least one computer 102-108 is coupled to host controllers 110 and 112. Host controllers 110 and 112 are coupled to a plurality of disks 114-120.

Typically, system 100 is configured as a Redundant Array of Independent Disks (RAID)-1, which stores the mirrored content of disks 114-116 in disks 118-120. That is, the disks 114-116 are mirrored by the disks 118-120.

The reliability of the computer system can be increased by copying the disks 114-116, the host controller 110, and the connections therebetween. Therefore, a reliable computer system is still operable at least when a single point of failure occurs on disks 114-116, RAID controllers 110 and 112, computers 102-108, and their connections. However, the performance of the storage system using system 100 may still be insufficient. In addition, increasing the effectiveness of such systems is still costly and often not feasible.

There is therefore a need to address these and/or other prior art issues.

A system, method and computer program product for providing data redundancy in a plurality of storage devices. In operation, a store instruction is received in accordance with the first data redundancy architecture to provide data redundancy. In addition, the store instructions are translated in accordance with the second data redundancy architecture to provide data redundancy. In addition, translation storage instructions are output to provide data redundancy in multiple storage devices.

2A shows a system 280 that provides data redundancy in a plurality of storage devices in accordance with an embodiment. As shown, system 280 includes at least one computer 285-288. Computers 285-288 will communicate with at least one controller 290-291. As further shown, the controllers 290-291 are in communication with a storage system 292 that includes a plurality of disk controllers 293-294 and a plurality of storage devices 296-299. It should be noted that although controllers 290-291 are shown separately, in another embodiment, the controllers 290-291 may be a single component. Moreover, in various embodiments, the plurality of disk controllers 293-294 can also be one component or separate components.

In operation, storage instructions are received in accordance with the first data redundancy architecture to provide data redundancy. In addition, the storage instructions are translated according to the second data redundancy architecture to provide data redundancy. In addition, translation storage instructions are output to provide data redundancy in a plurality of storage devices 296-299.

In the context of this description, a store order is any command, instruction or material used to store or assist in the storage of data. Moreover, in the context of this description, a data redundancy architecture refers to any type of architecture that provides redundant data or fault tolerance in a system. For example, in various embodiments, the data redundancy architecture This may include, but is not limited to, Redundant Array of Independent Disks (RAID) 0 Data Redundancy Architecture, RAID 1 Data Redundancy Architecture, RAID 10 Data Redundancy Architecture, RAID 3 Data Redundancy Architecture, RAID 4 Data Redundancy Architecture, RAID 5 data redundancy architecture, RAID 50 data redundancy architecture, RAID 6 data redundancy architecture, RAID 60 data redundancy architecture, square parity check data redundancy architecture, any non-standard RAID data redundancy architecture, any nested RAID data redundancy Remaining architecture, and / or any other data redundancy architecture that meets the above definitions.

In one embodiment, the first data redundancy architecture may include a RAID 1 data redundancy architecture. In another embodiment, the second data redundancy architecture can include a RAID 5 data redundancy architecture. In another embodiment, the second data redundancy architecture can include a RAID 6 data redundancy architecture.

Moreover, in the context of this description, multiple storage devices 296-299 may represent any type of storage device. For example, in various embodiments, storage devices 296-299 can include, but are not limited to, mechanical storage devices (eg, disk drives, etc.), solid state storage devices (eg, dynamic random access memory (DRAM), fast Flash memory, etc., and/or any other storage device. In the case where the storage devices 296-299 include flash memory, the flash memory may include, but is not limited to, a single layer unit (SLC) device, a multi-level cell (MLC) device, a NOR flash memory, a NAND flash memory. Body, MLC NAND flash memory, SLC NAND flash memory, etc.

More information on the various alternative architectures and functions will now be presented, and the user may or may not implement the aforementioned architecture as needed. It is important to note that the following information is presented for illustrative purposes and should not be used in any way. Interpreted as a limitation. Any of the following features can be selected to work with other features described.

2B shows a storage subsystem 250 that provides data redundancy among a plurality of storage devices, in accordance with an embodiment. As an option, the storage subsystem 250 can be viewed in the details of Figure 2A. However, of course, storage subsystem 250 can be implemented in any desired environment. It should also be noted that the foregoing definitions may apply to this description.

As shown, the storage subsystem 250 includes a plurality of primary storage devices 231-232, and at least one additional storage device 233-234 for increasing storage capacity to contain redundant information. The data storage of the storage subsystem 250 can be considered as the sum of the storage capacities of the plurality of primary storage devices 231-232. As an option, the storage capacity can be expanded by additional storage devices 233-234. Of course, in one embodiment, the additional storage devices 233-234 can be used separately to store redundant information calculated from the stored data.

As further shown, the first disk controller 210 includes at least one port 201. In operation, at least one port 201 can serve as the first port of the storage subsystem 250. In addition, at least one port 201 can serve as the first disk controller 210 to the disk controller bus 203, the power supply line 275, and the first disk controller 210 to the storage device 231-234. Corresponding to the connection of the internal wires 211-214 of the bus bars 241-244.

The bus bar 203 connects the first disk controller 210 with the second disk controller 220. In operation, bus bar 203 can be used to monitor the operation of the first disk controller 210 and the second disk controller 220. When the second When the disk controller 220 detects that the first disk controller 210 is faulty, the disk controller 220 can transmit an interrupt request to the first disk controller 210 through the disk controller bus 203, and interconnects the internal disk controller 210. Lines 211-214 are interrupted from corresponding busbars 241-244.

The busbar 203 connecting the first disk controller 210 and the second disk controller 220 can monitor the operation of the second disk controller 220 using the first disk controller 210. When the first disk controller 210 detects that the second disk controller 220 is faulty, the first disk controller 210 can transmit an interrupt request to the second disk through the disk controller bus 203. The controller 220 interrupts the internal wires 221-224 and the corresponding bus bars 241-244.

In one embodiment, the first disk controller 210 can detect internal incorrect operation or incorrect operation associated with the first disk controller 210. In this case, the first disk controller 210 can interrupt the wires 211-214 from the corresponding bus bars 241-244 when an internal incorrect operation is detected. Likewise, the second disk controller 220 can detect internal incorrect operation or incorrect operation associated with the second disk controller 220. In this case, the second disk controller 220 can interrupt the wires 221-224 and the corresponding bus bars 241-244 when detecting internal incorrect operation.

Moreover, in one embodiment, the first and second disk controllers 210 and 220 can detect a failure of the disk controller bus 203. In this case, the second disk controller 220 can interrupt the wires 221-224 from the corresponding bus bars 241-244, and the first disk controller 210 can still Maintain operations. In another embodiment, the first disk controller 210 can interrupt the wires 211-214 from the corresponding bus bars 241-244 while the second disk controller 220 remains operational. In another embodiment, the operating disk controller can interrupt the connection of the controller that is not in operation.

It should be noted that the interrupt bus bars 211-214 and 221-224 can be implemented by a tristate circuit, a multiplexer, or any other interrupt bus bars 211-214 and 221-224 circuits. For example, in one embodiment, the interrupt can be achieved by placing a three-state bus driver associated with disk controller 210 or 220 into a high impedance state. In another embodiment, the interrupt can be achieved by controlling the multiplexer at the input of storage devices 231-234.

As further shown, the second disk controller 220 includes at least one port 202. In operation, at least one port 202 can be used as the second port of the storage subsystem 250. In addition, at least one port 202 can be connected as a second disk controller 220 to the disk controller bus 203, the power supply cable 276, and the second disk controller 220 to the storage port. The connections of the internal connections 221-224 of the corresponding busbars 241-244 of the devices 231-234.

In providing a single redundant storage device 233, without additional redundant storage devices 234, the storage subsystem 250 can operate without loss of data in the event of any single point of failure of the storage devices 231-233. In one embodiment, the structure of the data and redundant information can be based on RAID 5. In another embodiment, the data and redundant information structures may be based on RAID 6, RAID 10, RAID 50, RAID 60, square parity check redundancy architecture, and the like.

In the case where two redundant storage devices 233 and 234 are provided, the storage subsystem can operate without loss of data when any two storage devices 231-234 fail. In operation, ports 201 and 202 can present data stored in storage subsystem 250 in two conventional, separate mirrored disks. In this case, the conventional independent mirror disk can be RAID 1, RAID 10, RAID 50, RAID 60, square parity check redundancy architecture, and the like.

The power of the storage subsystem 250 can be provided through an electrical connection 252 that is coupled to the power supply component 253 by a first power connector 251. The power of the storage subsystem 250 can also be provided through a connection 262 that is connected by a second power supply connector 261 to a second power supply component 263. As an option, the first power supply 253 output and the second power supply 263 output can be coupled to the disk controllers 210 and 220 and the storage devices 231-234 via the power distribution network 270. The storage devices 231-234 are coupled to the power distribution network 270 via corresponding connections 271-274. Disk controllers 210 and 220 are coupled to power distribution network 270 via power supply connections 275 and 276.

In the event of a power failure in the power connector 251, the storage subsystem 250 can be powered via the power connector 261. Similarly, the storage subsystem 250 can be powered through the power connector 251 in the event of a power failure to the power connector 261. In the event of a connection 252 failure, the storage subsystem 250 can be powered via connection 262. In the event of a connection 262 failure, the storage subsystem 250 can be powered via connection 252.

In the event of a power supply 253 failure, the storage subsystem 250 can be powered by the power supply 263. If the power supply 263 is faulty, The storage subsystem 250 is powered by a power supply 253. Similarly, storage subsystem 250 can be powered via connection 264 when connection 254 fails. Similarly, storage subsystem 250 can be powered via connection 254 when connection 264 fails. Thus, storage subsystem 250 can tolerate various component failures without rendering storage subsystem 250 inoperable.

In one embodiment, the disk controllers 210 and/or 220 may include circuitry to detect if power to the power supplies 253 and 263 is interrupted. In addition, the circuit can provide power to store the state of disk controllers 210 and 220 into storage devices 231-234 to avoid data loss. For example, an interruption of the power supply 253 and/or 263 can be detected.

In this case, power can be supplied to the storage devices 231-234 in response to detecting the interruption of the power supplies 253 and 263. The power supplies 253 and 263 can still supply the storage subsystem 250 with sufficient time after the power of the two power supplies 253 and 263 is interrupted, and complete the writing of the states of the disk controllers 210 and 220 to the storage device 231. -234. Therefore, power can be supplied to the storage devices 231-234 until the time when the data is not lost due to the power interruption of the power supplies 253 and 263. In various embodiments, power supplies 253 and 263 can include a battery, a capacitor, and/or any other component that can provide power to storage subsystem 250 when power supplies 253 and 263 are interrupted.

It should be noted that the storage sub-device 250 can continue to operate without a data loss when a single point of failure of any of the components shown in Figure 2B occurs. It should be noted that in various embodiments, storage devices 231-234 may be mechanical storage devices, non-mechanical storage devices, volatile or non-volatile storage. Storage device. Moreover, in various embodiments, the storage devices 231-234 can include, but are not limited to, a dynamic random access memory or a flash memory storage device (eg, an SLC device, an MLC device, a NOR gateway flash memory device, NAND) Gateway flash memory storage device, etc.).

Moreover, in one embodiment, disk controllers 210 and 220 can be implemented as two separate wafers. In another embodiment, disk controllers 210 and 220 can be implemented on a single wafer or die. For example, such an embodiment can be determined by package considerations.

FIG. 3 shows a disk assembly 300 in accordance with an embodiment. As an option, the disk assembly 300 can be implemented in the functions and architecture of Figures 1-2. However, of course, the disk assembly 300 can also be implemented in any desired environment. It should also be noted that the foregoing definitions may apply to this description.

As shown, the disk assembly 300 includes a printed circuit board 302 including a disk drive (not shown), a power connector including a main port that can be used as part of a SATA (Sequence Advanced Technology Add-on) connector 304, and A power connector having a second port as part of the second SATA connector 306. In a specific embodiment, disk assembly 300 can include a SAS (Sequence Attached SCSI) connector. For example, disk assembly 300 can include a printed circuit board 302 including a disk drive (not shown), a power connector having a primary port as part of SAS connector 304, and a second port as a second SAS. A power connector for a portion of connector 306.

As an option, connectors 304 and 306 can redundantly configure disk assembly 300 as a particular material. For example, a SATA interface can use the disk assembly 300 as a pair of disks set in the RAID 1 mode. In another concrete In the embodiment, the SAS interface can use the disk assembly 300 as a pair of disks set in the RAID 1 mode. In another embodiment, the SATA and SAS interfaces can use the disk assembly 300 as a plurality of disks set in the RAID 0 mode.

FIG. 4 shows a disk assembly 400 in accordance with another embodiment. As an option, the disk assembly 400 can be implemented in the context of the functions and architecture of Figures 1-3. However, of course, the disk assembly 400 can also be implemented in any desired environment. It should also be noted that the foregoing definitions may also apply to this description.

As shown, disk assembly 400 includes one or more disk assemblies 410 and 420. As an option, disk assemblies 410 and 420 can include disk assembly 300 of FIG. 3, in which case each disk assembly 410 and 420 can include a printed circuit board and connector 430.

Alternatively, each of the disk assemblies 410 and 420 can be interconnected by an electrical connection 401. In this case, the electronic connection 401 can provide a disk controller bus, for example, the disk controller bus 203 of FIG. 2B. In operation, the disk assembly can increase system storage performance by allowing more than one disk (e.g., disk assemblies 410 and 420) to occupy space in a conventional or primary storage device (e.g., a disk drive).

FIG. 5 shows a method 500 of operating a redundant disk controller in accordance with an embodiment. As an option, method 500 can be implemented in the functions and architecture of Figures 1-4. However, of course, method 500 can also be implemented in any desired environment. It should also be noted that the foregoing definitions may also apply to this description.

As shown, a storage system (eg, a disk assembly, etc.) is activated, see operation 510. The disk controller of a storage system is monitored, see operation 520. As an option, the disk controller can be monitored by another disk controller. The monitoring may include monitoring the disk controller through a bus bar between the two disk controllers (eg, the disk controller bus bar 203 of FIG. 2B, etc.), and/or monitoring the sink corresponding to the storage device of the storage system. Activities (eg, busbars 241-244 of the corresponding storage devices 231-234, etc.).

The storage system continues to operate and monitor the disk controller until it is determined that the monitored disk controller is faulty, see operation 530. If the monitored disk controller fails, the monitored disk controller will be interrupted, see operation 540.

In one embodiment, the interrupt of the disk controller can be implemented by issuing an interrupt command through a bus bar between two disk controllers (e.g., disk controller bus 203 of FIG. 2B). In this case, the interrupt instruction may include interrupting the busbar of the connected monitoring disk controller to the storage device (e.g., the wires 211-214 or 221-224 of FIG. 2B, etc.). In one embodiment, multiple disk controllers can be monitored by other disk controllers. In this case, each of the plurality of disk controllers can be considered a monitored disk controller.

FIG. 6 shows a method 600 of operating a redundant disk controller in accordance with another embodiment. As an option, method 600 can be implemented in the functions and architecture of Figures 1-5. However, of course, the method 600 can also be implemented in any desired environment. It should also be noted that the foregoing definitions may also apply to this description.

As shown, a storage system (eg, a disk assembly, etc.) is activated, see operation 610. The connection between at least two disk controllers in the storage system is monitored, see operation 620. In one embodiment, the connection between the disk controllers can include the disk controller bus 203 of FIG. 2B. Additionally, the connections between the disk controllers can be monitored by at least one disk controller (eg, the first and second disk controllers 210 and 220 of FIG. 2B, etc.).

The storage system continues to operate and monitor the connection until it is determined that the connection is faulty, please refer to operation 630. If the link fails, a disk controller is interrupted, see operation 640.

In one embodiment, the interrupting may include interrupting the bus controller connection to the storage device (eg, wires 211-214 or 221-224 of FIG. 2B, etc.). In this case, the instructions received by the connection associated with the interrupted controller will not be processed. For example, a second of the two disk controllers can be interrupted when the connection between the first and second disk controllers fails. In this case, the first controller can continue to operate, and the instructions from the second disk controller interface will not be processed.

FIG. 7 shows a system 700 for operating a redundant disk controller in accordance with another embodiment. As an option, the system 700 can be implemented in the functions and architecture of Figures 1-6. However, of course, the system 700 can also be implemented in any desired environment. It should also be noted that the foregoing definitions may also apply to this description.

As shown, at least one computer 702-706 is provided. Computers 702-706 are coupled to a plurality of RAID controllers 712-714, and controllers 712-714 are associated with A plurality of storage devices 716-722 communicate, which may include the use of ports associated with storage devices 716-722.

The reliability of system 700 can be achieved by using storage devices 716-722 having internal disk redundancy (e.g., storage system 250 of Figure 2B). In addition, all connections (eg, bus bars, etc.) can be replicated to ensure system 700 reliability. As an option, each of the storage devices 716-722 can include two ports that provide twice the bandwidth compared to a storage device that uses a single port. In addition, each storage device 716-722 can emulate two disks by utilizing a redundant system, such as RAID 5, RAID 6, RAID 10, RAID 50, RAID 60, square parity check redundancy architecture, and the like.

As an option, write reduction logic 708-710 can be utilized to reduce the number of writes to storage devices 716-722. In this case, the translation save instruction to provide data redundancy can be executed after the reduction. For example, storage instructions may be received in accordance with the first data redundancy architecture of controllers 712-714 (eg, RAID 5, RAID 6, RAID 10, RAID 50, RAID 60, square parity check redundancy architecture, etc.) to provide data redundancy. I.

The write reduction logic 708-710 is then utilized to reduce the number of writes to the storage devices 716-722, and then the storage instructions are translated (eg, by a circuit) in accordance with a second data redundancy architecture associated with the storage devices 716-722, To provide data redundancy. In one embodiment, the second data redundancy architecture can be the same as the first data redundancy architecture (eg, RAID 5, RAID 6, RAID 10, RAID 50, RAID 60, square parity check redundancy architecture, etc.) . In another embodiment, the second data redundancy architecture can be redundant with the first data. Different architectures (for example, RAID 1, RAID 6, RAID 10, RAID 50, RAID 60, square parity check redundancy architecture, etc.).

In one embodiment, the received data storage instructions may be formatted using write reduction logic 708-710 to provide data redundancy in accordance with the first data redundancy architecture and into a second data redundancy architecture compatible format. As an option, RAID controllers 712-714 can include an internal drive redundancy as described by storage devices 716-722, in such a manner that the number of writes to storage devices 716-722 can be reduced. Thus, after reducing the number of writes, the store instructions are translated to provide data redundancy in accordance with a second data redundancy architecture associated with storage devices 716-722. In this way, irregular distribution of data can be avoided.

FIG. 8 illustrates an exemplary system 800 in which various architectures and/or functions of various prior embodiments may be implemented. As shown, system 800 includes at least one host processor 801 coupled to a communication bus 802. System 800 also includes a main memory 804. The control logic (software) and data can be stored in the main memory 804 in the form of random access memory (RAM).

System 800 also includes a graphics processor 806 and a display 808, a computer screen. In a specific embodiment, the graphics processor 806 can include multiple shader modules, rasterization modules, and the like. Each of the aforementioned modules can even be mounted on a single semiconductor platform to form a graphics processing unit (GPU).

In the present description, a single semiconductor platform can be an integrated circuit or wafer of a single semiconductor substrate. It should be noted that a single semiconductor platform may also refer to a multi-chip that has the ability to increase connectivity by analog single-chip operation and achieve substantial improvements through the use of conventional central processing units (CPUs) and busbars. Module. Of course, various modules can be placed individually, or a plurality of different semiconductor platforms can be combined according to user needs.

System 800 can also include a secondary storage device 810. The secondary storage device 810 includes, for example, a hard disk drive and/or a removable storage disk, that is, a floppy disk drive, a tape drive, an optical disk drive, and the like. The removable disk drive can read or write a removable storage element in a well known manner.

The computer program or computer control logic algorithm can be stored in the main memory 804 and/or the secondary storage device 810. When the computer program is executed, the system 800 can be caused to perform various functions. Memory 804, storage device 810, and/or other storage devices can be implemented as embodiments of computer-readable media.

In a specific embodiment, the architecture and/or functions of the various previous figures may be implemented in a host processor 801, a graphics processor 806, a secondary storage device 810, and at least a host processor 801 and a graphics processor 806. Part of the functional integrated circuit (not shown), a chipset (ie, designed to operate and sell components to perform functional groupings, etc.), and/or any other integrated circuit.

In addition, the architecture and/or functionality of the various various figures may be implemented in a general computer system, a circuit board system, a game console system for entertainment, a particular application system, and/or any other desired system. For example, system 800 can take the form of a desktop computer, a laptop, and/or other types of logic. Moreover, system 800 can take a variety of other forms of devices including, but not limited to, personal digital assistant (PDA) devices, mobile telephone devices, televisions, and the like.

Additionally, although not shown, system 800 can also be connected to a network for communication purposes [eg, telecommunications networks, regional networks (LANs), wireless networks, wide area networks (WANs), such as the Internet, peer-to-peer networks, Cable network, etc.].

While the specific embodiments have been described above, it is to be understood that Therefore, the breadth and scope of the preferred embodiments are not to be construed as limited

100‧‧‧System based on prior art

102‧‧‧ computer

104‧‧‧ computer

106‧‧‧ computer

108‧‧‧ computer

110‧‧‧Host Controller

112‧‧‧Host controller

114‧‧‧Disk

116‧‧‧Disk

118‧‧‧Disk

120‧‧‧Disk

201‧‧‧Links

202‧‧‧Links

203‧‧‧Disk controller bus

210‧‧‧First disk controller

211‧‧‧Internal connection

212‧‧‧Internal connection

213‧‧‧Internal connection

214‧‧‧Internal connection

220‧‧‧Second disk controller

221‧‧‧Internal connection

222‧‧‧Internal connection

223‧‧‧Internal connection

224‧‧‧Internal connection

231‧‧‧Storage device

232‧‧‧Storage device

233‧‧‧Storage devices; redundant storage devices

234‧‧‧Storage device; redundant storage device

241‧‧‧ busbar

242‧‧‧ busbar

243‧‧ ‧ busbar

244‧‧ ‧ busbar

250‧‧‧Storage subsystem

251‧‧‧Power connector

252‧‧‧Electronic connection

253‧‧‧Power supply components; power supply

254‧‧‧Connected

261‧‧‧Second power connector

262‧‧‧Connected

263‧‧‧Power supply components; power supply

264‧‧‧Connected

270‧‧‧Power Distribution Network

271‧‧‧Connected

272‧‧‧Connected

273‧‧‧Connected

274‧‧‧Connected

275‧‧‧Power supply connection

276‧‧‧Power supply connection

280‧‧‧ Provide data redundancy system in multiple storage devices

285‧‧‧ computer

286‧‧‧ computer

287‧‧‧ computer

288‧‧‧ computer

290‧‧‧ Controller

291‧‧‧ Controller

292‧‧‧Storage system

293‧‧‧Disk controller

294‧‧‧Disk controller

296‧‧‧Storage device

297‧‧‧Storage device

298‧‧‧Storage device

299‧‧‧Storage device

300‧‧‧Disk components

302‧‧‧Printed circuit board

304‧‧‧Connector

306‧‧‧Connectors

400‧‧‧Disk components

401‧‧‧Electronic connection

410‧‧‧Disk components

420‧‧‧Disk components

430‧‧‧Connector

500‧‧‧How to operate a redundant disk controller

510‧‧‧Operation-storage system startup

520‧‧‧Operation-Monitor Disk Controller

530‧‧‧Operation-Monitoring whether the disk controller is faulty?

540‧‧‧Operation-Monitor Disk Controller

600‧‧‧How to operate a redundant disk controller

610‧‧‧Operation-storage system startup

620‧‧‧Operation-Monitor Disk Controller Link

630‧‧‧Operation-link is faulty?

640‧‧‧Operation-Interrupted Disk Controller

700‧‧‧System for operating redundant disk controllers

702‧‧‧ computer

704‧‧‧ computer

706‧‧‧ computer

708‧‧‧Write reduction logic

710‧‧‧Write reduction logic

712‧‧‧RAID controller; controller

714‧‧‧RAID controller; controller

716‧‧‧ storage device

718‧‧‧Storage device

720‧‧‧ storage device

722‧‧‧ storage device

800‧‧‧ system

801‧‧‧host processor; central processor

804‧‧‧ main memory

806‧‧‧Drawing Processor

808‧‧‧ display

810‧‧‧Secondary storage device

Figure 1 illustrates a system in accordance with the prior art.

2A shows a system for providing data redundancy in a plurality of storage devices, in accordance with an embodiment.

2B illustrates a storage system that provides data redundancy in a plurality of storage devices, in accordance with an embodiment.

Figure 3 shows a disk assembly in accordance with an embodiment.

Figure 4 illustrates a disk assembly in accordance with another embodiment.

Figure 5 illustrates a method of operating a redundant disk controller in accordance with an embodiment.

Figure 6 illustrates a method of operating a redundant disk controller in accordance with another embodiment.

Figure 7 illustrates a system for operating a redundant disk controller in accordance with another embodiment.

FIG. 8 illustrates an exemplary system in which various architectures and/or functions of various prior embodiments may be implemented.

280‧‧‧ system

285‧‧‧ computer

286‧‧‧ computer

287‧‧‧ computer

288‧‧‧ computer

290‧‧‧ Controller

291‧‧‧ Controller

292‧‧‧Storage system

293‧‧‧Disk controller

294‧‧‧Disk controller

296‧‧‧Storage device

297‧‧‧Storage device

298‧‧‧Storage device

299‧‧‧Storage device

Claims (20)

A method for providing data redundancy in a plurality of storage devices, comprising: receiving a first storage instruction including a write from a computer and through a standard storage subsystem interface; reducing the number of received writes to generate a second a storage instruction; receiving, by a disk controller, the second storage instruction to generate a third storage instruction according to the first data redundancy architecture; and translating the third storage instruction according to the second data redundancy architecture, And outputting the translation storage instruction to a plurality of flash memories. The method of claim 1, wherein the first data redundancy architecture comprises a Redundant Array of Independent Disks (RAID)-1 data redundancy architecture. The method of claim 1, wherein the second data redundancy architecture comprises a Redundant Array of Independent Disks (RAID)-5 data redundancy architecture. The method of claim 1, wherein the second data redundancy architecture comprises a Redundant Array of Independent Disks (RAID)-6 data redundancy architecture. The method of claim 1, wherein the standard storage subsystem interface comprises a sequence of Advanced Technology Attachment (SATA) interfaces. The method of claim 5, wherein the disk controller is contained within a disk assembly. The method of claim 1, wherein the standard storage subsystem interface comprises a sequence of additional SCSI (SAS) interfaces. The method of claim 7, wherein the disk controller is contained within a disk assembly. The method of claim 1, wherein at least one of the flash memories comprises NAND flash memory. The method of claim 9, wherein the NAND flash memory comprises a single layer cell (SLC) NAND flash memory. The method of claim 9, wherein the NAND flash memory comprises a multi-level cell (MLC) NAND flash memory. The method of claim 1, wherein the flash memory is contained within a disk assembly. The method of claim 1, wherein the method further comprises executing, by a processor included in a disk assembly, a computer program code including a function of reducing the number of writes. The method of claim 1, wherein one of the first data redundancy architecture or the second redundancy architecture may include a Redundant Array of Independent Disks (RAID)-10 data redundancy architecture, Independent Disk Redundant Array (RAID)-50 Data Redundancy Architecture, Redundant Array of Independent Disks (RAID)-60 Data Redundancy Architecture, and one of the square parity check redundancy architectures. A storage system for use with a plurality of flash memories, comprising: a standard storage subsystem interface component for receiving a first storage instruction containing a write from a computer; a processing component for reducing a number of received writes by the program to generate a second storage instruction; receiving And a generating component for receiving the second storage instruction through a disk controller and generating a third storage instruction according to the first data redundancy architecture; and a translation component for redundancy according to the second data The architecture translates the third storage instruction; and a storage device interface component for outputting the translated storage instruction to the plurality of flash memories. The storage system of claim 15 wherein the standard storage subsystem interface comprises a sequence of Advanced Technology Attachment (SATA) interfaces. The storage system of claim 15 wherein the standard storage subsystem interface comprises a sequence of additional SCSI (SAS) interfaces. The storage system of claim 15, wherein the first data redundancy architecture comprises a Redundant Array of Independent Disks (RAID)-1 data redundancy architecture. The storage system of claim 15, wherein the second data redundancy architecture comprises a Redundant Array of Independent Disks (RAID)-5 data redundancy architecture. The storage system of claim 15, wherein the second data redundancy architecture comprises a Redundant Array of Independent Disks (RAID)-6 data redundancy architecture.