Difference between Storage Area Network (SAN) and Network Attached Storage (NAS)

Computer NetworkInternetHardware

Storage Area Network (SAN)

Storage Area Network (SAN) is used to transfer data between a server and storage devices using fiber channels and switches. Data is denoted by disk blocks. SAN uses SCSI, SATA protocols. Following are important components of SAN.

  • Node ports

  • Cables

  • Hubs, switches, directors as interconnect devices.

  • Storage arrays

  • SAN management Software

Network Attached Storage (NAS)

Network Attached Storage (NAS) uses files to store data block. Here data is identified by file name as well as byte offset. Here file system is mananged by CPU and memory as Head Unit. Following are important components of NAS.

  • Head Unit: CPU, Memory

  • NIC, Network Interface Card

  • Optimized operating system.

  • File System Protocols

  • Other protocols like ATA, SCSI and FC.

Following are some of the important differences between Storage Area Network (SAN) and Network Attached Storage (NAS).

Sr. No.KeyStorage Area Network (SAN)Network Attached Storage (NAS)
1Stands forSAN stands for Storage Area Network.NAS stands for Network Attached Storage.
2Data IdentificationIn SAN, data identification is done by disk blocks.In NAS, data identification is done by file name as well as byte offset.
3Managed byIn SAN, file system is managed by servers.In NAS, file system is managed by head unit like CPU.
4CostSAN is more expensive than NAS.NAS is less expensive than SAN.
5ProtocolsSAN uses SCSI, SATA etc protocols.NAS uses File Server, CIFS etc. protocols.
6Backup and RecoveryIn SAN, block by block copying technique is used for backup and recovery.In NAS, files are used for backup and recovery.
raja
Published on 15-Apr-2020 10:41:28
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