KR100986131B1 - Solid state disk with function of raid - Google Patents

Solid state disk with function of raid Download PDF

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Publication number
KR100986131B1
KR100986131B1 KR1020080031661A KR20080031661A KR100986131B1 KR 100986131 B1 KR100986131 B1 KR 100986131B1 KR 1020080031661 A KR1020080031661 A KR 1020080031661A KR 20080031661 A KR20080031661 A KR 20080031661A KR 100986131 B1 KR100986131 B1 KR 100986131B1
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KR
South Korea
Prior art keywords
interface
raid
control unit
solid state
data
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Application number
KR1020080031661A
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Korean (ko)
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KR20090106139A (en
Inventor
이준오
Original Assignee
주식회사 셀픽
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Priority to KR1020080031661A priority Critical patent/KR100986131B1/en
Publication of KR20090106139A publication Critical patent/KR20090106139A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/06Digital input from or digital output to record carriers, e.g. RAID, emulated record carriers, networked record carriers
    • G06F3/0601Dedicated interfaces to storage systems
    • G06F3/0668Dedicated interfaces to storage systems adopting a particular infrastructure
    • G06F3/0671In-line storage system
    • G06F3/0683Plurality of storage devices
    • G06F3/0688Non-volatile semiconductor memory arrays
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/06Digital input from or digital output to record carriers, e.g. RAID, emulated record carriers, networked record carriers
    • G06F3/0601Dedicated interfaces to storage systems
    • G06F3/0668Dedicated interfaces to storage systems adopting a particular infrastructure
    • G06F3/0671In-line storage system
    • G06F3/0683Plurality of storage devices
    • G06F3/0689Disk arrays, e.g. RAID, JBOD

Abstract

The solid state disk supporting the RAID function of the present invention includes a flash memory unit divided into a plurality of disks for a RAID configuration, multiple host interfaces for simultaneously executing multiple data processing commands from a host, and a logical form of the host interface. And a control unit for simultaneously controlling the mutual conversion between the data in the physical form and the data between the respective disks.
The invention as described above has the effect of implementing the RAID function in a small device such as a notebook by mounting a plurality of S-ATA interface to support the RAID function in one solid state disk.
Solid State Disk, Raid, Flash Memory, Interface, S-ATA

Description

SOLID STATE DISK WITH FUNCTION OF RAID}

The present invention relates to a solid state disk, and more particularly, to a solid state disk equipped with a plurality of interfaces to support the RAID function.

Generally, RAID (Redundant Array of Inexpensive Disks) is a technology that divides and stores data in parallel in multiple storage devices, and there are largely RAID-0 and RAID-1 methods depending on how the data is divided and stored. These methods are used independently or in combination.

As shown in FIG. 1, RAID-0 10 is commonly referred to as striping, and serves to store data divided into two or more storage devices. Thus, such a RAID-0 (10) has the advantage that the read, write and transfer speed is fast. In addition, RAID-1 20 is commonly referred to as mirroring, and serves to store the same data in two or more storage devices. Therefore, there is an advantage that data can be stored as safely as possible without data loss.

This RAID method divides and stores the data in several storage devices, so that even if one storage device is damaged, the data can be loaded through the other storage device. Increase it. In addition, since a plurality of data are stored in parallel in the storage device, the stored data can be quickly loaded and thus the overall performance can be improved.

However, since at least two storage devices are required to implement the above-described RAID, the RAID cannot be implemented in a small device such as a notebook, which has a very small internal space and cannot be equipped with a plurality of storage devices. Has

In addition, when performing a raid on a large capacity server equipped with a plurality of storage devices, the number of storage devices for performing the raid increases significantly, which causes a problem that the size of the large capacity server becomes larger.

In order to solve the above problems, an object of the present invention is to provide a solid state disk for supporting a RAID function by mounting multiple interfaces to a solid state disk mounted on a notebook.

In addition, an object of the present invention is to provide a solid state disk that supports a RAID function that can reduce the size of a large server by reducing the number of solid state disk to perform the RAID.

In order to achieve the above object, a solid state disk supporting the RAID function of the present invention includes a flash memory unit divided into a plurality of disks for a RAID configuration, and multiple hosts for simultaneously executing multiple data processing commands from a host. An interface and a control unit for controlling mutual conversion between the logical data of the host interface and the physical data between each disk at the same time.

The controller may include a host interface for performing a plurality of data processing commands, a logic unit for physical communication of a plurality of flash memories, and a central controller controlling the logic unit.

The logic unit includes a P-ATA interface for converting multiple data processing commands and data input / output in parallel, a flash memory interface for physical control of a plurality of flash memories, and a P-ATA interface and a flash memory interface. It may include a central control interface in charge of the interface with the central control for control.

The control unit may further include a master central control unit for setting and monitoring the environment and operation characteristics of the plurality of central control units.

The host interface may be an S-ATA interface.

In order to implement this, a solid state disk used as a storage device in a notebook will be described as an embodiment.

According to the present invention, by mounting a plurality of S-ATA interfaces to support a RAID function in one solid state disk, the RAID function can be implemented in a small device such as a notebook.

In addition, by providing an interface for parallel processing of data on the solid state disk according to the present invention, the bus bandwidth is increased to increase the transmission speed.

In addition, the present invention has the effect of reducing the size of a large server that requires a large number of disks by reducing the number of solid state disks for the RAID implementation.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram illustrating a RAID system having a solid state disk according to the present invention, and FIG. 3 is a block diagram illustrating a process of implementing a solid state disk supporting RAID according to the present invention.

Referring to FIG. 2, a RAID system having a solid state disk according to the present invention includes a host 100 having a RAID controller 110 embedded therein, and a solid state disk capable of performing a RAID function by operating as a plurality of disks ( 200).

The RAID controller 110 configures data transmitted from the host 100 according to the RAID level, and the RAID controller 110 may be embedded in the host 100.

The solid state disk 200 capable of raid processing by a data processing command provided from the host 100 may include a flash memory unit 300 divided into a plurality of disks 310 constituting the RAID, and an interface with the host 100. And the host interface 400 for converting the data processing commands provided from the host 100 in parallel, and simultaneously processing the data processing commands converted in parallel with the host interface 400 according to the RAID level. And a controller 500 for controlling input and output between the disk 310 regions of the apparatus.

The flash memory unit 300 is composed of a plurality of flash memories, which are nonvolatile memory devices for storing data, and may form a single disk 310 by grouping some flash memories.

When the RAID level is determined by the RAID controller 110, a host interface 400 is provided to perform an interface with the host 100, and the host interface 400 performs multiple data processing from the host 100. The controller 500 receives a command for controlling the multi-processing. To this end, the host interface 400 may be divided into a plurality, and the divided host interfaces 410 are formed to correspond to the number of disks. In this case, as the divided host interface 410, an S-ATA interface 410 having a high data processing speed may be used.

The control unit 200 controls the operation of the logic unit 510 and the logic unit 510 to physically simultaneously process the multiple data processing commands converted in parallel form through the central control unit interface 514 P- The central control unit 520 serves to optimize and speed up the ATA interface 512 and the flash memory interface 516.

The logic unit 510 is provided with a P-ATA interface 512 for interfacing data processing commands converted in parallel from the host interface 400, and such a P-ATA interface 512 is parallel from the host interface 400. Receive the data processing commands sent to the server in parallel so that they can be processed simultaneously.

The central controller 520 controls the data set in the form of a logical address and the flash memory interface 516 through the central controller interface 514 from the multiple data processing commands provided from the P-ATA interface 512 to match the flash characteristics. An FTL algorithm (not shown) for mapping a data set in the form of a physical address is mounted.

In addition, the control unit 200 may be further provided with a master central control unit 600 to be described later to set and monitor the environment and operation characteristics of each of the central control unit 520, and the master central control unit flash The number of disks 310 divided from the memory unit 300 is set.

The logic unit 510 further includes a flash memory unit interface 516 that is controlled by the central control unit 520 through the central control unit interface 514 and is responsible for physical communication and control of the flash memory unit 300. As a result, the data set in the logical form laid by the RAID controller 110 is converted into the data set in the physical form on each disk 310 of the flash memory unit 300.

Accordingly, when a request for processing multiple logical data in parallel form is generated according to a command of the host 100 from the host interface 400, the control unit 500 simultaneously processes them to process each disk of the flash memory unit 300 ( 310 to process the physical data.

Hereinafter, a process of implementing a solid state disk supporting a RAID function according to the present invention will be described.

As illustrated in FIG. 3, when two disks of the flash memory unit 300 are implemented, the flash memory unit 300 may be divided into a first disk 312 and a second disk 314. Eight flash memories 316 are mounted on the first disk 312 and the second disk 314, respectively. The host interface is implemented with a first S-ATA interface 412 and a second S-ATA interface 414 to perform data processing and commands on the first disk 312 and the second disk 314.

The central control unit is configured to perform data processing commands from the first S-ATA interface 412 and the second S-ATA interface 414 to the first disk 312 and the second disk 314. 522 and a second central control unit 524 are provided. Here, the first central control unit 522 and the second central control unit 524 may include a ROM 526 in which a program necessary for input / output is stored and a RAM 528 as a temporary storage buffer of data. Here, the master central control unit 600 for setting and monitoring the environment and operation characteristics of the first central control unit 522 and the second central control unit 524 may be further provided.

When the host 100 transmits and requests data laid out through two S-ATA interfaces 412 and 414 and a command therefor is transmitted in parallel to the P-ATA interface 512 of the logic unit 510, P The -ATA interface 512 allows this to be handled simultaneously.

Subsequently, the first central control unit 522 and the second central control unit 524 transmit logical data to the flash memory unit interface 516 according to a command transmitted to the P-ATA interface 512 through the central control unit interface 514. By converting the data into physical data, the read and write operations are performed on the first disk 312 and the second disk 314, respectively.

Here, the first disk 312 and the second disk 314 may be implemented such that the mirroring function or the pariting function, or the mirroring and the pariting function are combined according to the RAID level specified by the RAID controller 110. Of course, when the flash memory unit is divided into three or more disks, various raid levels may be used.

As described above, the solid state disk according to the present invention is composed of a plurality of disks using a flash memory, and by mounting a plurality of host interfaces, one solid state disk can be implemented to perform a RAID function.

As a result, even in a notebook in which the space was difficult to implement a raid, by providing the solid state disk according to the present invention, the raid function can be implemented.

In addition, by providing a plurality of interfaces to the solid state disk according to the present invention and to implement a simultaneous processing, there is an effect that can increase the transmission speed by increasing the bus band.

In addition, there is an effect of innovatively reducing the space in a large server that requires a large number of disks to implement a raid.

Although described above with reference to the drawings and embodiments, those skilled in the art that the present invention can be variously modified and changed within the scope without departing from the spirit of the invention described in the claims below I can understand.

1 is a diagram illustrating a raid system according to a conventional raid level.

2 is a block diagram illustrating a RAID system having a solid state disk according to the present invention.

3 is a block diagram illustrating a process of implementing a solid state disk supporting a RAID according to the present invention;

<Description of the code | symbol about the principal part of drawings>

100: host 110: RAID controller

200: solid state disk 300: flash memory portion

400: host interface unit 410: S-ATA interface

500: control unit 600: master central control unit

Claims (5)

  1. A host interface composed of a flash memory unit 300 divided into a plurality of disks 310 for a RAID configuration, and multiple S-ATA interfaces 410 for simultaneously executing multiple data processing commands from the host 100. 400 and a control unit 500 for simultaneously controlling mutual conversion between the logical form of data of the host interface 400 and the physical form of data between each disk 310;
    The control unit 500 includes a logic unit 510 for physical communication of a plurality of disks 310 and a central control unit 520 for controlling the logic unit 510;
    The logic unit 510 includes a P-ATA interface 512 that is responsible for multiple converted data processing commands and data input / output in parallel, and a flash memory interface 516 that is responsible for physical control of a plurality of disks 310. And a central controller interface 514 for interfacing with the central controller 520 for controlling the P-ATA interface 512 and the flash memory interface 516. Solid state disk.
  2. delete
  3. delete
  4. The method according to claim 1,
    The control unit 500 further includes a master central control unit 600 for setting and monitoring the environment and operation characteristics of the central control unit 520.
  5. delete
KR1020080031661A 2008-04-04 2008-04-04 Solid state disk with function of raid KR100986131B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013176306A1 (en) * 2012-05-23 2013-11-28 Taejin Info Tech Co., Ltd. System architecture based on flash memory
KR20150121502A (en) 2014-04-21 2015-10-29 삼성전자주식회사 Storage controller, storage system and method of operation of the storage controller

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5680579A (en) 1994-11-10 1997-10-21 Kaman Aerospace Corporation Redundant array of solid state memory devices
US6467022B1 (en) 1998-04-16 2002-10-15 International Business Machines Corporation Extending adapter memory with solid state disks in JBOD and RAID environments
KR20030045842A (en) * 2000-10-30 2003-06-11 인터내셔널 비지네스 머신즈 코포레이션 System and method to coordinate data storage device management operations in a data storage subsystem
US20060004657A1 (en) * 2004-06-30 2006-01-05 Menke Robert M Method for establishing and administering a benefits program

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5680579A (en) 1994-11-10 1997-10-21 Kaman Aerospace Corporation Redundant array of solid state memory devices
US6467022B1 (en) 1998-04-16 2002-10-15 International Business Machines Corporation Extending adapter memory with solid state disks in JBOD and RAID environments
KR20030045842A (en) * 2000-10-30 2003-06-11 인터내셔널 비지네스 머신즈 코포레이션 System and method to coordinate data storage device management operations in a data storage subsystem
US20060004657A1 (en) * 2004-06-30 2006-01-05 Menke Robert M Method for establishing and administering a benefits program

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