Storage Area Networks, Networks, Networking, Computer Networks

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Storage Area Networks, Networks, Networking, Computer Networks

  1. 1. Presented by:Nazir AhmadEnrollment No.: 110215Storage Area NetworksAn Introduction
  2. 2. NetworkA group or a collection of two or more computers, printers,routers, switches, systems linked together so that they areable to communicate with each other using sometransmission media such as wires, cables, fibre, etc.Types:- LAN, MAN, WAN
  3. 3. Storage in Consideration !!!3-technologies :- DAS, NAS and SANDAS (Direct Attached Storage) : Data Storage resides onhard disks that are locally attached to individual servers.NAS (Network Attached Storage) : Storage that sits onthe ordinary network (or LAN) and is accessible bydevices (servers and workstations) attached to that LAN .
  4. 4. SAN- Storage Area Network A SAN is a separate “network” dedicated to storagedevices and at minimum consists of one (or more) largebanks of disks mounted in racks that provide for ‘shared’storage space which is accessible by many servers/systems.
  5. 5.  SAN can be local or can be extended overgeographical distances. facilitates the high speed data transfer between theservers and the storage in three ways:1. Sever to Server2. Server to Storage3. Storage to Storage
  6. 6. What makes a SAN ?StorageDevicesHigh SpeedConnectivitySANManagementSANSoftware
  7. 7. SAN Environment
  8. 8. SAN Components SAN Servers SAN Storage SAN Interconnect- 3 levelsi. low level- consist of Physical, data Link and the networklayer, includes ethernet, FC, and SCSI interfaces.ii. Middle level- consist of transport and the session layer,includes Protocols.iii. High level- consist of presentation and the applicationlayer.
  9. 9. SAN- TopologiesThe three Fibre Channel topologies are:• Point-to-point- simplest, used when there are exactly two nodes,and future expansion is not predicted.•Arbitrated loop- applies to hubs, a loop of 126 devices, traffic flowsin one direction only around the loop.• Switched fabric- applies to switches allows to have multiple,dedicated data paths
  10. 10. SAN Management consists of a management layer, which organizes theconnections, storage elements, and computer systems sothat data transfer is secure and robust. needed to actually configure, monitor, control, diagnoseand troubleshoot the SAN Components to enable them allto function together..
  11. 11. i. Storage level : is comprised of the storage devices thatintegrate the SAN, such as disks, disk arrays, tapes, andtape libraries.ii. Network level: is comprised by all the componentsthat provide connectivity, such as cables, switches,inter-switch links, gateways, routers.iii. Enterprise Level: comprises all devices andcomponents present in a SAN environment, as well asthe workstations indirectly connected to itSAN Management – 3 levels
  12. 12. SAN SecurityMost important entities which are given consideration are: Access Control- performed by both means ofauthentication and authorization. Data Security- includes both data confidentiality anddata integrity. Encryption. Auditing and Accounting.
  13. 13. SAN- Applications Shared Repository and Shared Data Data Vaulting and Data Backup Data Interchange Data Protection and Disaster Recovery.
  14. 14. SAN Issues Procurement, installation and configuration of SANs is still ahighly complex and lengthy exercise. An inadequately resourced or poorly designed SAN can itself be asingle point of failure for a large volume of data. SANs are relatively complicated to implement and requiresignificant training needs for both server/storage support teamsand operations support staff that carry out backups andmonitoring etc. Still there are many interoperability issues between the variouscomponents of a SAN.
  15. 15. Thank You !

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