存储区域网络 (SAN)：
存储区域网络 (SAN) 用于在服务器和存储设备光纤通道和交换机之间传输数据。在 SAN(存储区域网络)中，数据由磁盘块标识。 SAN 中使用的协议有：SCSI、SATA 等。
存储区域网络 (SAN) 的组成部分：
1. Node ports
2. Cables
3. Interconnect device such as: Hubs, switches, directors
4. Storage arrays
5. SAN management Software 网络附加存储 (NAS)：
在网络附加存储 (NAS) 中，数据由文件名和字节偏移量标识。在网络附加存储中，文件系统由 CPU 和内存等 Head 单元管理。在备份和恢复中，使用文件而不是逐块复制技术。
网络附加存储 (NAS) 的组件：
1. Head unit: CPU, Memory
2. Network Interface Card (NIC)
3. Optimized operating system
4. Protocols
5. Storage protocols: ATA, SCSI,FC 存储区域网络 (SAN) 和网络附加存储 (NAS) 之间的区别：
| S.NO | SAN | NAS |
|---|---|---|
| 1. | SAN stands for Storage Area Network. | NAS stands for Network Attached Storage. |
| 2. | In SAN (Storage Area Network), data is identified by disk block. | In NAS (Network Attached Storage), data is identified by file name as well as byte offset. |
| 3. | In SAN (Storage Area Network), file system is managed by servers. | In NAS (Network Attached Storage), file system is managed by Head unit. |
| 4. | SAN (Storage Area Network) is more costly. | NAS (Network Attached Storage) is less expensive than SAN. |
| 5. | SAN(Storage Area Network) is more complex than NAS. | NAS (Network Attached Storage) is less complex than SAN. |
| 6. | Protocols used in SAN are: SCSI, SATA etc. | Protocols used in NAS are: File server,CIFS etc. |
| 7. | For backups and recovery in SAN, Block by block copying technique is used. | For backups and recovery in NAS, Files are used. |
| 8. | SAN gives high performance in high speed traffic systems. | While NAS is not suitable for that environment which has high speed traffic. |
| 9. | SAN needs more time and efforts in organizing and controlling. | NAS is easy to manage and provides a simple interface for organizing and controlling. |
| 10. | SAN needs TCP/IP networks and depends on the LAN. | NAS not depends on the LAN and uses high speed fiber channel network. |