Documents
Resources
Learning Center
Upload
Plans & pricing Sign in
Sign Out

Introduction of storage area network

VIEWS: 17 PAGES: 14

In this PDF 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 http://www.shopricom.com/375_3356_

More Info
									   INT ROD UCT ION OF
STORAGE AREA NET WORK
 SUMMARY

     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.
              TECHNOLOGIES

 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.
  INIT IATOR 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 drives.
               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 interoperability.
                           NAS

 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.
         SW ITCHING FABRIC
              SERV ICE

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

 Fiber channel standardized by ANSI T11 committee.

 SCSI standardized by T10 committee. URL = www.T10.org

 FCIA is the fiber channel industry association it is not
involved in the standardization process. University of New
Hampshire also involved here.
THANK YOU

								
To top