What's the difference between SAN and NAS?

Created: Jan 13, 2020 13:37:41Latest reply: Jan 23, 2020 02:38:52 103 3 1 0
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Hi team,

Who can tell me the essential difference between SAN(Storage Area Network) and NAS(Network attached Storage)? This is my problem, can anyone help me? Thank you!


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little_fish
Admin Created Jan 13, 2020 13:49:54 Helpful(2) Helpful(2)

Hi Phany,

In my opinion, the basic difference between SAN and NAS is, SAN is Fabric based and NAS is Ethernet based.

SAN - Storage Area Network

It accesses data on block level and produces space to host in form of disk.

SAN is a dedicated network that provides access to consolidated, block level data storage. SANs are primarily used to make storage devices, such as disk arrays, tape libraries, and optical jukeboxesto servers so that the devices appear like locally attached devices to the operating system. Historically, data centers first created "islands" of SCSI disk arrays as direct-attached storage (DAS), each dedicated to an application, and visible as a number of "virtual hard drives" (i.e.). Operating systems maintain their own file systems on their own dedicated, non-shared LUNs, as though they were local to themselves.

NAS - Network attached Storage

It accesses data on file level and produces space to host in form of shared network folder.

NAS, in contrast to, uses file-based protocols such as NFS or SMB/CIFS where it is clear that the storage is remote, and computers request a portion of an abstract file rather than a disk block. The key difference between direct-attached storage (DAS) and NAS is that DAS is simply an extension to an existing server and is not necessarily networked. NAS is designed as an easy and self-contained solution for sharing files over the network.

More content about:

Differences between SCSI, ISCSI, FCP, FCoE, FCIP, NFS, CIFS, DAS, NAS, SAN

Thanks.

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All Answers
little_fish
little_fish Admin Created Jan 13, 2020 13:49:54 Helpful(2) Helpful(2)

Hi Phany,

In my opinion, the basic difference between SAN and NAS is, SAN is Fabric based and NAS is Ethernet based.

SAN - Storage Area Network

It accesses data on block level and produces space to host in form of disk.

SAN is a dedicated network that provides access to consolidated, block level data storage. SANs are primarily used to make storage devices, such as disk arrays, tape libraries, and optical jukeboxesto servers so that the devices appear like locally attached devices to the operating system. Historically, data centers first created "islands" of SCSI disk arrays as direct-attached storage (DAS), each dedicated to an application, and visible as a number of "virtual hard drives" (i.e.). Operating systems maintain their own file systems on their own dedicated, non-shared LUNs, as though they were local to themselves.

NAS - Network attached Storage

It accesses data on file level and produces space to host in form of shared network folder.

NAS, in contrast to, uses file-based protocols such as NFS or SMB/CIFS where it is clear that the storage is remote, and computers request a portion of an abstract file rather than a disk block. The key difference between direct-attached storage (DAS) and NAS is that DAS is simply an extension to an existing server and is not necessarily networked. NAS is designed as an easy and self-contained solution for sharing files over the network.

More content about:

Differences between SCSI, ISCSI, FCP, FCoE, FCIP, NFS, CIFS, DAS, NAS, SAN

Thanks.

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little_fish
little_fish Admin Created Jan 15, 2020 11:09:59 Helpful(0) Helpful(0)

NAS provides a file operation and management system, while SAN does not.
NAS can control the permissions of different users to access different files, while SAN cannot.
NAS supports quota control, while SAN does not.
SAN focuses on high-speed data storage, while NAS emphasizes file sharing.
SAN is an exclusive data storage pool, while NAS can be either a shared or an exclusive data storage pool.
SAN is efficient and scalable, while NAS is simple and flexible.
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Phany
Phany Created Jan 23, 2020 02:38:52 Helpful(0) Helpful(0)

Posted by little_fish at 2020-01-13 13:49 Hi Phany,In my opinion, the basic difference between SAN and NAS is, SAN is Fabric based and NAS is ...
Thanks a lot!
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