Nas, short for networkattached storage is a file level computer data storage connected to a computer network that provides access to clients. Difference between storage area network and network attached storage. First it is best to define the difference between a block device and filesystem. San, short for storagearea network, is a dedicated network that allows multiple users to access block level data storage. Storage systems play a crucial part in any organizations computers. The differences between nas and san can be seen when comparing their cabling and how theyre connected to the system, as well as how other devices communicate with them. There are currently three basic concepts for addressing storage.
If your organization deals with large amounts of unstructured data, nas might be a better option. But dont let the rearranged letters also known as a semordnilap confuse youthere are major differences, pros, and cons to each solution. Virtualization what is the difference between a virtual and physical build computer. Under the osn initiative, many vendors such as amdahl, network appliance, cisco.
Both nas and san share the common objectives of providing cost efficient and centralized management of all enterprise data with full sharing of any data by any computer to a single lock protected data image. Storage area network san is used for transferring the data between the servers and the storage devices fiber channel and switches. Io requests also called protocols or commands access. Types of storage the three fundamental types of storage are. Nas is reflected in how each type of storage appears to the user. Nas works as a remote system, where file requests are redirected over a network to a nas device.
Nas and san will continue to butt heads for the next few months, but as time goes on, the boundaries between nas and san are expected to blur, with developments like scsi over ip and open storage networking osn, the latter recently announced at networld interop. View notes san vs nas difference between a storage area network and network attached storage. San vs nas difference between a storage area network and. Networkattached storage nas is a filelevel data storage server connected to a computer network providing data access to a heterogeneous group of clients a storage area network san is a dedicated network that provides access to. Today you will find out whether it is nas or san that fits your needs. Storage usually disk or tape is directly attached by a cable to the computer processor. From this abstraction comes one of nas biggest advantages. Some disk systems allow the aggregate disk capacity to be carved into partitions subsets of capacity. Differences between san and nas its easy to confuse the terms storage area network san and network attached storage nas.
A nas is a single storage device that operates on data files, while a san is a local network of several devices. A storage area network san provides a pool of storage resources that can be centrally managed and allocated as needed, but how is a san. This is easier grasped if you are familiar with unix because it makes an objective. Both refer to relatively new network technologies that let you manage the disk storage on your network. Instead of blocks, data lives in volumes that are made up files and folders. Nas can be accesses across multiple operating systems but not san 5. Nas manages its own file system while san does not 4. Difference between san and nas with comparison chart. Nas has always been used traditionally to refer to a dedicated appliance that shares filesystems using nfs, cifs etc. When you are looking for a local storage for business, there come two options.
San storage area network is a blocklevel storage protocol, meaning data is stored and accessed in blocks. A storage area network is a network that includes only storage devices. Well start with a brief description of the major storage. San april 6, 2015 by chelsea shettler 0 comments the convergence of mobile devices and government and industry regulations have left companies reeling with data that needs to be securely stored to ensure integrity, compliance and protection against costly outages. Navigating the storage landscape can be tricky especially if youve never purchased storage at the business level or if your business storage needs have recently changed and youre not sure what to do next. San vs nas difference between a storage area network. A san storage area network is a dedicated high performance network to move data between. Nas and san are similar enterprise level storage implementations.
Ein raid redundant array of independent disks ist eine anzahl gewohnlicher. A storage area network san is a highspeed network with the sole purpose of providing storage to other servers to which it is attached. The easy difference between san and nas data storage. The differences between nas and san can be seen when comparing their cabling and how theyre connected to the system, as. This post will focus on the difference between nas and san and. Learn how you can help your company choose from a variety of storage options, from directattached storage, to networkattached storage and. Learn how you can help your company choose from a variety of storage options, from direct attached storage, to networkattached storage and storage area networks.
Nas network attached storage, using that definition and your loose definitions, san is and nas are equivalent. Almost every form of data exchange you make on a daily basis can be broken. Everyone is familiar with a physical computer, lets take a look we all know what this is though we may not know the name, so heres a video to refresh your memory san a storage area network. The number one difference in between a san and a nas is how they deal with data. In summary, there are many types of storage solutions that can be used in a windows environment. Difference between storage area network san and network attached storage nas storage area network san. San is generally either high end fibrechannel or can also be iscsi. Whereas cdn is generally used for delivering data closer to the requested source. While network attached storage nas device is a server connected to a network with the sole purpose of providing storage. San and nas are two of the leading storage solutions that are commonly compared and confused because of their similar acronyms.
However, even enterprise it budgets are not infinite, and organizations need to optimize their storage expenditures to suit their priority requirements. Nas network attached storage network attached storage, compared to server attached storage on the other hand is. Difference between san and nas compare the difference. What is the difference between san and nas san vs nas. One way to loosely conceptualise the difference between a nas and a san is that a nas appears to the client os operating system as a file server the client can map network drives to shares on that server whereas a disk available through a san still appears to the client os as a disk, visible in disk and volume management utilities along clients local disks, and available to be. What is the difference between san vs nas server fault. Network storage and its future international journal of. If you click on the specifications, they will actually list the processors within. Nas provides file level access while san provides access to the individual blocks on the drives.
Difference between storage area network san and network. These can be differentiated by the fact that san storage area network shares the storage to the dedicated network whereas nas network attached storage share the storage over a shared network. Network attached storage nas is more abstracted than san storage. At the initial instance san and nas might seem to be mirror images of each other, infact in most cases any would work in a given situation as both usually use raid connected to a network which is later backedup.
Tivoli that provides nas like file sharing, with data sent over the san rather than the lan for improved performance. The user connects to the nas to access files on it. San is generally either high end fibrechannel or can also be. A nas system or device is attached to a network via a standard ethernet connection, so it appears to users like any other networkconnected device.
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