This document discusses storage area networks (SANs) and their components. It begins by introducing SAN team members and describing fibre channel concepts like nodes, ports, and topologies. It then provides an overview of SAN components such as servers, storage devices, fibre channel switches, backup devices, and management software. Specific SAN solutions are described like server-free backup and restore using a centralized tape library, clustering for high availability, and disaster recovery across extended fabric links. The document also covers SAN switching, ISL trunking, zoning for security and access control, and compares SANs to network attached storage (NAS).

1. 1
Storage Area Network
SAN
Team Members:
Lee Kwok Chiu, Albert
Tan Kin Hon, Terence
Wong Siu Por, Paul

2. 2
Fibre Channel Tutorial
• Concept of “Nodes” and “Ports”
• Nodes can be Hosts or Devices, the
ports are the bus adapters.
• Nodes communicate via three possible
topologies: Point to point, Loop, and Fabric.
P1 P2 P3
NODE
PORTS
N
Port
N
Port Switch
Point to Point
N
Port
N
Port
N
port
N
Port
NL
Port
NL
Port
NL
Port
NL
Port
Loop
F Port
F Port
F Port
F Port
FL Port
NL
Port
NL
Port
Hub
Fabric
E Port E Port
Switch

3. 3
Storage Area Network (SAN)
IBM SUN
EMC
FC-AL
Hub
HP
SCSI
HP Arrays & JBOD’s
Tape
Libraries
Non-HP
Linux
HP-UX
NT
Servers
HBA: JNI,
Qlogic, etc
OS: Solaris,
AIX, NT, etc
Switches
Storage Arrays
Tapes Libray
Application
Omniback,
Netbackup
Oracle, Sybase
SAN Mgr LM/DM

4. 4
A san configuration
= Fibre Channel
Legend
San
Switches
NT Server
IBM: AIX
HPUX servers
SUN:solaris
Linux servers
SAN
switches
Storage
array
San switches

5. 5
San Components
 Server systems
 IBM(RS6000), SUN(E10000), HP(superdome), DELL)
 Storages Device
EMC(Clarion), HDS(9900), IBM(shark), HP(xp1024)
 Fibre Channel Switches, hubs
Brocade, Mac-data, Cisco
 Backup devices
 tape library (Storage Tech )
 Management & backup software
Veritas backup, HP openview, Legato, CA unicenter

6. 6
San Switches
SilkWorm 2400 (8 ports)
SilkWorm 2800 (16 ports)
Hardware Features
-8 & 16 port Fabric –
Switches.
-Universal ports (E, F, FL)
-1 Gb/s port speeds
( 2 Gb/s now)
-Hardware Port Zoning
-ISL Trunking
-Hot-swappable,
redundant cooling fan,
power supply
Management
- telnet & web browsing
-12000: no single point of
failure
SilkWorm 12000 (128 port core
switches)

7. 7
Switch Management
-using web browsing or telnet

8. 8
Why SAN &
SAN switches ?
 High Speed
 Using of Fibre channel
switching technology.
 Full duplex bandwidth: 1Gb/s,
2 Gb/s, 8 Gb/s using Trunking Servers
Workstations
LAN Clients
Storage
LAN
SAN
SAN
Manager
 Cost effective
 Storage resource share
 Data is readily across the
enterprise
 Improved Return on
Investment (ROI)
 Centralized management
 High expandability, high
scalability
 San Solution, the “market
trend” !!
 Server Free backup and
restore
 Clustering
 Business continuance &
Disaster recovery
 Fulfill business
requirement

9. 9
SAN Solution: Server-free back up &
Restore
 Traditional network with
each server attached its
tape library.
 Using single SAN tape
library for backup.
 Backup is centralized
and effective.
 Online data copies &
snapshot, and server
downtime is minimized.
Tape library
Storage
switches

10. 10
San Solutions:Clustering
 Redundant path available to
storage device.
 No single point of failure.
 Non-disruptive maintenance
and upgrade.
 Advantages:
 Quick application
dynamic failover is
feasible.
 Transparent to users.
 99.9% system
availability.
Dual switches

11. 11
San Solutions:Clustering (cont’d)
T-Class
V-Class V-Class
Brocade 2800
High End Array
e.g. XP 512
= SCSI
= Fibre Channel
Legend

12. 12
SAN Solutions: Business continuity and
disaster Recovery
 Losing Millions of
dollars for hourly
system outage.
(Financial security firms,
Stock Exchange)
 High Data & system
availability is
extremely important !
 Non-stop !

13. 13
SAN Solution: Business continuity and
disaster Recovery (cont.d)
 Mirror site set up using
extended fabric (120
KM), using:
DWDM (Dense-Wave
Division Multiplexing)
Extend wavelength
GBIC
SFP (small form Factor
Pluggable interfaces)
Using existing WAN
Technology like ATM
for long distance.
 Business operation
resume within a short
time during disaster.
ATM
DWDM

14. 14
ISL Trunking:
What is ISL?
ISL is link between 2
san switches, so call
inter switching links.
What is ISL Trunking?
Combine 4 pyhsical
ISLs into one single
logical links.
Advantages:
High bandwidth (8Gb/s)
Load sharing
In order frame delivery
Link redundancy on need
for re-routing if one link
failure
Simpler management
• Only one logical link
between 2 switches.
Use in between core switch
in large scale SAN.

15. 15
ISL Trunking:
Throughput of ISL no (trunking)=(1+1.5+0.5+1+1)Gb/s = 5 Gb/s
Throughput of ISL trunking =(1.5+1.5+0.5+1+2)Gb/s = 7 Gb/s

16. 16
SAN Security- Zoning
Storage Area network devices arranged into specified
logical groups.

17. 17
SAN Security- Zoning(cont’d)
 What is san zoning?
Fabric-connected devices
arranged into specified logical
groups, devices can be
members of multiple zone.
 Types zoning:
 Port Zoning – base on switch
port (domain ID, number)
 WWN Zoning– base on fibre
channel card’s World wide
name which is similar to Mac
address of Ethernet card.
 Mixed Zoning – base on port
& WWN.
 Advantages of zoning:
 Partition storage area networks
into logical groupings of
devices.
 Flexible: device can be member
of more than one zone, like tape
library.
 Controlled access: barrier
between different operating
environment – AIX, Solaris,
hpux, win2000, Linux.
 Ease of monitoring:
 Can telnet into san switches
 Using web browser.

18. 18
SAN Security- Zoning example (with ISL trunking)

19. 19
SAN(storage area network) & NAS (network attached
storage)
Clients
Network
Attached
Storage
Network
Printers
LAN
Application
Servers
Database
Servers
File &
Print
Servers
High-end
Storage
Arrays
Mid-range
Arrays &
JBOD
Secondary
Storage
(DLTs, etc.)
SAN
Fibre
Channel
Traditional
Servers
w/ attached
Storage
Fibre Channel
Switches, Hubs, etc.

20. 20
SAN &NAS (cont’d)
SAN Nas
Protocol a)Fibre Channel
b)Fibre Channel Scsi
TCP/IP
Applications -Mission-critical transaction-
based database application
-High Availability
-Backup & Restore
-Business Continuance
-Storage Consolidation
-Server Consolidation
-Limited read only data
base access
-File Sharing in NFS and
CIFS
-Small-block of data
transfer over long
distances
Advantages -Large, heterogeneous
block data transfer
-Data transfer reliability
-Reduces LAN traffic
-Configuration flexibility
-High Performance
-High Scalability
-Centralized Management
-Multiple Vendor offerings
-Resilience to failure
- Simpilied addition of
files sharing capacity
- Easy deployment and
maintenance
- Best for low-volume file
sharing between multiple
peer clients which are
less sensitive to response
times

21. 21
Thank You !!
Questions if any ?