Question

目前有哪些主流存储技术？

The traditional storage technology is DAS, it is a storage device connected directly with the server, the server is completely to the
Heart, as part of the server. DAS for storage device can be tape, disk, disk display and
Tape library, the typical DAS storage equipment of all kinds of disk is displayed.
The current network storage technology have NAS, SAN, ISCSI. NAS is in the TCP/IP protocol based on carry
For file storage services; SAN is mainly based on the fiber channel, the block data storage, can be regarded as
The expansion of the traditional bus; ISCSI is in front of two kinds of technology in the TCP/IP network convergence, the number of oriented
According to the piece of SCSI protocol encapsulated in the TCP/IP packet to in the TCP/IP network transmission technology.
All kinds of storage technology characteristics analysis and introduce:
Since always, used to store data storage area network (SAN) are based on optical fiber channel (FC, namely
Fibre - Clannel) based on technology, this technology to the application of storage area

Answer 1

存储区域网络 (Storage Area Network, SAN)是一种连接外接存储设备和服务器的架构。人们采用包括光纤通道技术、磁盘阵列、磁带柜、光盘柜(en)的各种技术进行实现。该架构的特点是，连接到服务器的存储设备，将被操作系统视为直接连接的存储设备（英语：Direct-attached_storage）。尽管SAN的复杂度和价格已经下降，但目前在大型企业级存储方案（英语：Enterprise_storage）以外还应用不甚广泛。
与SAN相比较，网络储存设备(NAS, Network Attached Storage)使用的是基于文件的通信协议，例如NFS或SMB/CIFS通信协议就被明确滴定义为远程存储设备，计算机请求访问的是抽象文件的一段内容，而非对磁盘进行的块设备操作。