1. An Introduction to STORAGE NETWORKS

2. Agenda
 Introduction to Storage
 Overview of DAS, NAS & SAN
 Communication Model
 Comparison of storage Networks
 Core Technologies & Market Players

3. Introduction-Storage
 What is storage?
 A storage is a bulk system (Disk Array) where we can save / share the data for
centralized access and management
 Evaluation of Storage
 DAS - Direct Attached Storage
 NAS - Network Attached Storage
 SAN - Storage Area Network
 Advantage of Storage Networks
 Consolidation of Storage
 Centralized / flexible Administration
 High Availability (Improved RAID performance)
 Mission critical
 Centralized backup control
 Avoid Unscheduled Downtime
 Business Continuity services

4. Overview of DAS, NAS & SAN
 DAS
 Interface Technologies – PATA,SATA,SCSI, SAS
 File System Protocol - NTFS,FAT (16,32), HFS, JFS, UFS , UDF
 NAS
 Interface Technologies –TCP / IP
 File System Protocol – NFS, SMB / CIFS & also it can support all file based protocol (Vendor dependant)
 SAN
 Interface Technologies – Fibre Channel Protocol (FCP), Internet SCSI (iSCSI), Fibre Channel IP
(FCIP),InfiniBand
 File System Protocol – OS / Application Dependant
Application / SW File system Storage
Application / SW File system StorageN/W
Application / SW StorageFile system FC/GbE

5. Communication Model

6. Comparison of Storage Networks
Storage Feature DAS NAS SAN
Terminology
A traditional way of storage system
Physically connected to a single host
machine
Shares network bandwidth
User can access at file level over a LAN, a
WAN, or over the Internet
Shares data at block level.
Commonly associated with Fibre
Channel networks
Interface Technologies
IDE (PATA, SATA) SCSI (SCSI,
SAS)
TCP / IP
FCP, iSCSI, FCoE , FCIP, InfiniBand,
HyperSCSI, FICON
File System NTFS, FAT, JFS, HFS, UFS, UDF NFS, SMB / CIFS OS / Application decides
Capacity Limited to ports on the local server Not limited (Expandable) Not limited (Expandable)
Speed of accessing
storage
Fast Somewhat slow
Very fast (In the speed of Gb’s., Latest
one is 10Gb
Ease of adding storage
Might require shutting down servers to
add storage
Easy (Hot – Swap) Easy (Hot-Swap)
Redundant connectivity No No Yes
Centralized management No No Yes
Ease of expansion Limited to host’s physical ports Allow modest expansion Quick and easy
Suited for databases Yes No Yes
Cost In expensive Moderately expensive Moderately expensive
Distance between server
and storage
Must be close under (6 feet) Distance doesn’t matter Distance doesn’t matter
Backup
Each volume copied separately from
server tape
Each volume copied separately from server tape
Can back up multiple volumes without
server interaction
Major Player Seagate Technologies NetApp, EMC Corp
Brocade ( SAN Equipments),
EMC(Storage Equipments)

7. Core Technologies & Market Players
Technologies Market Players Product
Networking Solutions
Brocade (McData)
Cisco
Qlogic
FC Switch
IP Switch
HBAs, SAN Directors
Storage Solutions
EMC, Hitachi Data Systems
HP, IBM
Legato Systems Inc
Disk Arrays
Territory storage
JBODs
Backup Technologies
Symantec (VERITAS) NetBackup
HP OV Data Protector
IBM Tivoli
SAN Manger
Brocade Fabric OS
IBM Tivoli Storage Manager
HP OV SAN Manger
Symantec (VERITAS) CommandCentral Storage
High Availability / Cluster
management
Symantec (VERITAS) Global Cluster Manager
HP OpenVMS, M/C Service Guard
SUN Solaris Cluster
Disaster Recovery Solutions
EMC SRDF
IBM PPRC
HDS TrueCopy
NSI Software's DoubleTake
HP SW BusinessCopy

8. Storage SIG in Future
 Separate sessions on the Storage Networks
 Strong focus on SAN & Interface technologies
 Introduction to the emerging technology FAN
 Detail discussion on HA Clusters & Load sharing
 Detail discussion on Disaster Recovery Plans
 Discussion about Fault Tolerant Architecture
 Discussion on Associate technologies with Virtual training enabled
 In plant training on SAN designing with SAN Simulator