Untitled: White board for stacking my life

Port zoning (Multipath zoning)

Granting storage access authority to the servers with WWN(World Wide Name) and SAN switch port in SAN network

ref: IBM Knowledge Center

Storage building methods

1. DAS (Direct-Attached Storage)

 - Directly connect the server and data storage with interfaces:

SCSI, IDE, FC, etc.

 - Goods

= Traditional and popular building method of storage

= Directly connected for performance and safety

 - Bads

= Sharing and accessing differences between each interfaces

= Low scalability

2. NAS (Network Attached Storage)

 - Use network to access server to storage (NFS, CIFS)

 - The file server has DAS and communicate via TCP/IP

 - Goods

= File system sharing

= Independent data with accessing server

 - Bads

= The bottle neck could be occurred with data request

= If the file server dead, can not access to the storage

3. SAN (Storage Area Network)

 - Using SAN switch to connect with storage (iSCSI)

 - N : M accesses between servers and storages

 - Goods

= High speed disk I/O with fiber channel

= Sharing storage with multiple servers

= Scalability

 - Bads

= FC limited distance

= Need network devices