Introduction of storage area network - PowerPoint PPT Presentation

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Introduction of storage area network


In this PPT we describe the introduction of storage area network. We illustrate this using different points. We also describe the basics, architecture and mechanism of SAN. It is presented by _ – PowerPoint PPT presentation

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Title: Introduction of storage area network


  • 1)What is SAN
  • 2)Basics of SAN
  • 3)Architecture of SAN
  • 4)Basic mechanism of SAN

What is SAN
  • Storage area network is a design to transfer
    data, from server to clients. It is alternative
    to the directly attached targets. It is primarily
    used as the storage device server can access
    this. It is also highly performance storage
    device enabling to communicate with one another.

  • Different of technologies are used for SAN. Most
    popular is the Fiber channel. But IP based
    solutions are also used. Concepts of SAN also
    implemented on the devices those are attached to
    like disk, tapes, RAID, file server etc. We
    frequently used NAS and SAN collaterally.
    Difference between them are SAN is network
    storage sub system NAS is storage subsystem. SAN
    extension of disk channel not connected to server
    but NAS connected to server via IP network.

Basics of san
  • Different technologies can be used to
    interconnect different network nodes. Fiber
    channel is dedicated high performance channel. It
    is used fiber channel protocol. SCSI protocol
    carry IP packet over the network. SCSI is the
    extension of the SCSI bus.

Initiator and target
  • Fiber channel can be source or the destination of
    the information. If the node is initiator then it
    is connected to the network through HBA (Host Bus
    Adapter) it is a physical layer connection. It
    may be electrical or fiber optical. If the node
    is target then it is connected through RAID
    (Redundant Array of Independent Disk) or storage

Hard drives
  • Basic storage is the hard drives. It is composed
    of different disks, platters, cylinders, track
    and sectors. It is metallic disk used for storage
    of data. Logical block address within the disk is
    512 byte. Files can be stored in the sectors so
    they can be stored and retrieved. File system
    deals with clusters of blocks and it uses FAT
    (File Allocation Table) to map the file sectors.

Jbod and raid
  • Jbods are group of disks packaged in a connected
    via FC loop. RAID is more sophisticated device it
    improves the storage disk performance. It
    improves the performance the reading and writing
    from disk at the same time or it mirroring the
    information on the multiple disk array.

Architecture of san
  • RAID array containing the disk array and RAID
    controller . It providing hardware and feature of
    RAID 0- 5. Direct attached storage is an
    architecture is used to storage privately
    attached servers. It is expensive and complex to
    manage. Storage is accessed from block level not
    file level. It is high performance. It uses good
    management tool and storage is shared. It uses

  • Network attached storage is an architecture which
    attached to the server with a multiprocess
    network. This network is a IP process network.
    Transmission Control Protocol can be tuned to
    optimized storage transport.

Mechanism of san
  • Fiber channel act as a transport layer of SCSI.
    Fiber channel is used instead of TCP/IP network
    to connect server to the storage. In the long
    graphical distance IP can be used. It can be used
    in the IP traffic. FC offers layer 2 transport
    service and used layer 3 to map upper layer
    protocols like SCSI, HIPPI and IP.

Switching fabric service
  • FC switching fabric relies upon number of
    software applications and to deliver transport
  • Most relevant ones are Zoning, Alias service,
    domain controller.
  • Those service allow fabric to function without
  • It consist of a set of information distributed
    across the fabric nodes.

Standardization body
  • Fiber channel standardized by ANSI T11 committee.
  • SCSI standardized by T10 committee. URL
  • FCIA is the fiber channel industry association it
    is not involved in the standardization process.
    University of New Hampshire also involved here.

Thank you
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