The concepts about Storage Area Network (SAN)

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 ?