2. Outline
Definition
Introduction
NAS Architecture
NAS Framework
Difference Between NAS And SAN
Managing NAS
NAS Security
Benefits And Drawbacks
Future Enrichment
Conclusion
References 2
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3. Definition
A storage device which attached directly to a network,
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called network attached storage(NAS)
NAS provide file access services to computer system and
act like a storage element –SNIA(Storage Network
Industry Association)
NFS (Network File System) is one of the common
Network Protocols implemented on NAS.
NAS is used to access and store different type of data
over a network. It contain one or more hard disks. 3
4. Introduction
Originally NAS have the fixed disks, RAID arrays magnetic
tape drives which are exactly connected to the
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networks(Eg.SAN and other networks).
NAS have its own LAN ip address for RAID configuration
which is attached to the administrator computer that provide
applications to network workplace clients.
Nowadays electronic data rising frequently, so reliable data is a
essential for small business.
NAS device is most efficient way to centralize, share and protect
information. Compared with DAS NAS solutions are easier to
manage and improved performance. 4
6. NAS Framework
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NAS device has a printed circuit board that removes TCP/IP
functions from a microprocessor. This high end version is
able to serving the files in web browsing (e-mail) and huge
file transfers between clients.
RAID Arrays : One or more redundantly aligned independent
hard disks, It will defend you from losing when an entity
hard disk fails in the NAS device.
Operating System : It is configured to present a computing
background for network attached storage device
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7. NAS Components
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Data reception component.
Data interception component.
Intermediate component.
Data identification component.
These are components for configuring the NAS system.
7
9. Managing NAS
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NAS Installation : firstly we need to prepare our
network then install the proper operating system.
Configuration : We can use different type of
interfaces for NAS configuration.
Interfaces : Console, Remote cell(rsh), comand line
interface(CLI), HTTP(hypertext transfer protocol)
and secure shell(ssh).
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10. Managing NAS (cont..)
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Applications : NAS server need some applications for
accessing data. These applications gives easy way to
access their files from everywhere in the network
environment.
Examples :
Home directories
Email
Database
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11. Maintenance
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For the reliable file sharing and access speed , NAS
system need day to day maintenance.
Such as,
Analyzing and monitoring the performance.
Hardware and software failures.
Performance tuning.
Storage management and user support.
However once we configured the NAS system then its
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very easy to maintain.
12. NAS Security
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Every organization and industries mostly depend upon
security feature and NAS device also face some security
challenges as other network components
NAS system uses strong cryptography for data hiding
from unauthorized users.
NAS have some main protection process in these areas
Physical security.
General network security.
Access control lists. 12
13. NAS Security(cont..)
Physical security :
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NAS device should be placed in separate room, where
only authorized access allowed.
General network security :
This is the traditional networking security method where
the system administrator make sure that these devices
are accessed by only companies ip addresses.
Access control list :
Administrators should create a complex password to
secure the access to the NAS device.
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14. Benefits of NAS
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Network attached storage is very simple to share files
anywhere on your network in less time by applying
power and configuring a few settings.
A reliable and efficient network saves your organization
time and money.
It is very low cost to add additional storage drives in to
the NAS system.
The NAS storage is shared by multiple clients and
servers. 14
15. Disadvantages of NAS
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The file transfer speed is not as fast as DAS(direct
attached storage).
For using NAS device people should know some basic
knowledge about computer networking.
System available features depend upon the NAS chip and
firmware.
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16. Future Enrichment
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In high confidential Zone many companies don’t use
NAS system because sharing of data will become a
problem.
A Research & Development team continuously
developing NAS system for future enhancement.
This development makes NAS system more faster,
flexibility and high functionality.
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17. Conclusion
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Nowadays NAS is a new concept for the computer
network. This concept used for development and
growth of computer networks.
This NAS system is becoming a initial part of the
small scale industries and computing environment.
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18. References
Available online at
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www.freepatentsonline.com/y2010/0070466.html
“Using SANs and NAS” W.curtis preston, O‟Reilly
Publisher, First edition 2002,isbn: 0-596-00153.
www.pdl.cmu.edu/pp2-ftp/NASD/cmu-cs-97-185.pdf.
„Mission critical network planning‟ by matthew liotine
www.brighthub.com/computing/smb.security/articales/23
63.aspx
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Notas do Editor
Mission – Critical Network Planning Book by Mathew Liotine.
http://www.bestpricecomputers.co.uk/reviews/advice/network-attached-storage.html(DAS – Direct Attached Storage),(SAN-Storage Area Network)
www.dabs.com/learn-more/components-and-storage/network-attached-srorage--nas--explained-3989The above diagram shows modern Network Attached Storage Architecture. A NAS multimedia storage server is interconnected to several servers and clients through wireless area network. The NAS is places the network between the file client and file system. This connection is far easier to connect and manage and share your multimedia files and other files in one convenient place. Compared with Direct Storage System(DAS) NAS is mush faster. Importantly the NAS devices support effective data sharing between Network File System(NFS) and Common Internet File System(CIFS). In this different machines users can access the same collection of data without any special effort.
www.freepatentsonline.com/y2010/0070466.html
Data Reception Component : It configured to accept multiple data file from several clients systemsb) Data Interception Component :It is used to data transformation from reception component to non-volatile data storage and also it updates the index information.c) Intermediate Component :This is used to tracks the relevant data from index information.d) Data identification Component: It is used to identifies the allocation of the data items using index information.
www.nas-san.com/differ.htmlThe above figures shows NAS and SAN differences. These storage devices are almost same process but in some facts its defer.Mostly both SAN and NAS use RAID arrays for connecting t network.Some major differences between NAS and SAN : NAS Head is connected to servers by using TCP/IP network connection and SAN uses Fiber channel switch to communicate with servers. Protocols : NAS uses TCP/IP, NFS, CIFS, HTTP but SAN used only encapsulated SCSI(small computer system interface) protocols. NAS file System : managed by NAS head unit SAN file system : managed by servers