A presentation for FY and SY student about basic knowledge of NAS which includes : 1. Introduction of NAS 2. Applications 3. Benefits 4. Advantages 5. Disadvantages 6. NAS vs SAN 7. Future of NAS

1. Network Attached
Storage (NAS)
BY: VIVEK THORAT
MAYUR GAIKWAD
MAYUR PATIL
MANOJ RATHOD

2. What is NAS ?

3. Definition
 A storage device which attached directly to a network is
called network attached storage(NAS).
 NAS provide file access services to computer system and act
like a storage element.
 NFS (Network File System) is one of the common Network
Protocols implemented on NAS.
 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. Applications
 In the home
 In the enterprise
 NAS is also broadly used in Facebook and YouTube

5. Benefits of NAS
 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.

6.  Easy to use
The process to use NAS as follow:
a. Insert NAS on your network
b. Assign IP address
c. Specify environment setting
d. Ready to use
 Data is protected
Most NAS device support RAID(redundant array of independent disk) which
provide a way to storing the same data in different place, so even one disk fails, user
still can access his or her data

7. DISADVANTAGES
 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.

8. MAINTENANCE
 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 very
easy to maintain.

9. NAS vs DAS
 In Direct Attached Storage, storage devices are directly attached to host
system. In order access the file data storage in DAS, user must have
physical access to the device. The advantage of DAS is it can end user
better performance than NAS. The disadvantage of DAS is, each storage
device is managed separately, so that will be too complicated to manage
whole direct attached storage system.

10. NAS vs SAN
 SAN and NAS seem similar, because both of them using
internet technology to ensure the user can easily excess and
manage their storage data. However, they are two different
storage technologies.
 Differences between both are:

12. DIFFERENCES B/W NAS and SAN
 SAN is divided and allocated to individual servers. Users and
applications can only access storage through allocated
server.
 However, NAS is connected to all the desktop, workstations
and servers on the standard Ethernet.
 The key distinction between SAN and NAS is that the
Storage Area Network manage I/O requests based on block
level, whereas the NAS manage I/O requests based on file
level

13.  SAN uses its specific network standard such as Fibre Channel. SAN
has its own dedicated switches, cables and protocols.
 NAS storage devices uses the standard Ethernet network, instead of
requiring special Fibre Channel network, switches, and cables. NAS is
much cheaper than SAN storage system

14. NAS vs SAN (File level vs Block level)
 BLOCK LEVEL STORAGE
Each block is controlled as a individual hard drive
Each block is managed by the server operating system.
Protocol used is iSCSI and Fibre Channel.
Used in Storage Area Network.

15.  FILE LEVEL STORAGE
Each file and folder can be accessed and managed by the storage system
itself.
Simple to implement.
Protocol used is Network File System (NFS).
Used in Network Attached Storage.

16. FUTURE OF NAS
 HYBRID NAS/SAN
 It is also called as Unified storage that supports both filed
based network and block based storage area network.
 Unified storage allows facilities to consolidate their storage
by using either IP or Fibre Channel Protocol

17. THANK YOU