Solved

What is the main differences between NAS and SAN?

Posted on 2013-01-19
3
708 Views
Last Modified: 2013-01-20
What is the main differences between NAS and SAN?

When one should be used more than another?

Thanks.
0
Comment
Question by:SAM2009
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 121

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 250 total points
ID: 38797065
The main difference is the access mode in which they are used

NAS - Network Attached Storage it's connected to your network, and access is at the file level, a NAS uses it's own file system. Traditional NAS perform NFS and CIFs (Windows Share/SMB) functions.

SAN - Storage Area Network. Functions are performed at the block level. SAN's can provide iSCSI and Fibre Channel attachment. Traditional SANs provide iSCSI and Fibre Channel.

This is where the area starts to get a little grey, because some devices are sold as NAS, which also offer SAN functions e.g. iSCSI

and some SANs (e.g. NetApp), can offer NFS, iSCSI, Fibre Channel, CIFs (Windows Shares) from the same device.

As for which one should you use, SANs are generally more expensive and performance is superior, that's not to say that you do not get fast performing SANs.

here are the Wiki References

SAN
http://en.wikipedia.org/wiki/Storage_area_network

NAS
http://en.wikipedia.org/wiki/Nas
0
 
LVL 10

Accepted Solution

by:
172pilotSteve earned 250 total points
ID: 38797964
Everything said above is true, but to try to make it more in simpler terms, a SAN provides your computer with what it thinks is a real local hard disk - The SAN "adapter" whether it's a Fiber Channel card, or an iSCSI adapter, simulates a disk controller, and appears to your system as a raw disk.  On that raw disk, you can create partitions, format the drive, etc, just like a physical hard drive connected to your machine.

A NAS (Network Attached Storage) is a drive that belongs to a different computer (sometimes a dedicated NAS appliance, but that's still a computer), and from your perspective on your computer is a pre-formatted  drive that typically already has a drive letter (or mountpoint in the case of Linux) and is "mapped" to your machine as a formatted drive.  "NAS" is basically the same as a traditional network share, and when you're mapping drives with UNC  (\\server\share) you are connecting to that device as a "NAS"

Are you trying to decide which one you need for a particular purpose?
0
 
LVL 1

Author Closing Comment

by:SAM2009
ID: 38798324
Thanks!
0

Featured Post

Secure Your WordPress Site: 5 Essential Approaches

WordPress is the web's most popular CMS, but its dominance also makes it a target for attackers. Our eBook will show you how to:

Prevent costly exploits of core and plugin vulnerabilities
Repel automated attacks
Lock down your dashboard, secure your code, and protect your users

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
Compliance and data security require steps be taken to prevent unauthorized users from copying data.  Here's one method to prevent data theft via USB drives (and writable optical media).
This video shows you how to use a vSphere client to connect to your ESX host as the root user. Demonstrates the basic connection of bypassing certification set up. Demonstrates how to access the traditional view to begin managing your virtual mac…
This video shows you how easy it is to boot from ISO images for virtual machines with the ISO images stored on a local datastore on the ESXi host.
Suggested Courses

617 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question