Network-attached storage ( NAS ), in contrast to SAN, High-speed block-level access to the hard drives such as email servers,
Include provision of transactionally accessed data that require Storage space onto the disk arrays. Common uses of a SAN Planned sharing of data on different computers within a LUN requires advanced solutions, such as SAN file systemsor clustered computing.ĭespite such issues, SANs help to increase storageĬapacity utilization, since multiple servers consolidate their private These would interfere with each other and quickly corrupt the data. If multiple systems were simply to attempt to share a LUN, Operating systems maintain their own file systems on their own dedicated, non-shared LUNs, as though they were local to themselves. Essentially, a SAN consolidates such storage islands together using a high-speed network. External Chassis connected to more than one Server via a Cable.ĭata centers first created “islands” of SCSI diskĪrrays as direct-attached storage (DAS), each dedicated to anĪpplication, and visible as a number of “virtual hard drives” (i.e. External Chassis of Disks connected to a Server via a Cable (SCSI or Fiber Channel) Libraries, and optical jukeboxes, accessible to servers so that theĭevices appear like locally attached devices to the operating system. SANsĪre primarily used to make storage devices, such as disk arrays, tape SAN (Storage Area Network) is storage product of IBM which provides dedicated network to block level data storage.
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