When it comes to enterprise data storage systems, the main options are direct-attached storage (DAS), network-attached storage (NAS) and storage area networks (SANs). Deciding which is right for your business depends on the following factors.
DAS Image

Direct Attached Storage (DAS)

The storage server is connected to another server with a cable (e.g. SAS cable) another server (point-to-point).
-  Fast Connection
- Spatial
- Limited by the physical cable length

NAS Image

Network Attached Storage (NAS)

​​​​​​​Software sharing of storage (whether it consists of local hard disks, DAS or SAN) on the network via file protocol: NFS, SMB, AFP, FTP, SFTP, etc.
- Easy to administer
- Relatively slow  (1GB / 2GbE / 10 GbE)
- Arbitrarily expandable
- File sharing
​​​​​​​- Higher security standards

SAN Image

Storage Area Network (SAN)

Storage server is integrated via network protocol (e.g. ISCSI, FC)
- Flexible
- spatial separation possible
- Multi-pathing against overload
- Redundancy