GGI Computer Science & Engineering Forum
07/07/2015
DAS is a block device from a disk which is physically [directly] attached to the host machine. You must place a filesystem upon it before it can be used. Technologies to do this include IDE, SCSI, SATA, etc.
SAN is a block device which is delivered over the network. Like DAS you must still place a filesystem upon it before it can used. Technologies to do this include FibreChannel, iSCSI, FoE, etc.
NAS is a filesystem delivered over the network. It is ready to mount and use.
Technologies to do this include NFS, CIFS, AFS, etc.
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